summaryrefslogtreecommitdiffstats
path: root/configure.vbs
blob: 19c0172765965851f6221ad0465b781fdc8b7b0d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
' $Id: configure.vbs $
'' @file
' The purpose of this script is to check for all external tools, headers, and
' libraries VBox OSE depends on.
'
' The script generates the build configuration file 'AutoConfig.kmk' and the
' environment setup script 'env.bat'. A log of what has been done is
' written to 'configure.log'.
'

'
' Copyright (C) 2006-2023 Oracle and/or its affiliates.
'
' This file is part of VirtualBox base platform packages, as
' available from https://www.virtualbox.org.
'
' This program is free software; you can redistribute it and/or
' modify it under the terms of the GNU General Public License
' as published by the Free Software Foundation, in version 3 of the
' License.
'
' This program is distributed in the hope that it will be useful, but
' WITHOUT ANY WARRANTY; without even the implied warranty of
' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
' General Public License for more details.
'
' You should have received a copy of the GNU General Public License
' along with this program; if not, see <https://www.gnu.org/licenses>.
'
' SPDX-License-Identifier: GPL-3.0-only
'


''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'  Header Files
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

''
' Includes a vbscript file relative to the script.
sub IncludeFile(strFilename)
   dim objFile, objFileSys
   set objFileSys = WScript.CreateObject("Scripting.FileSystemObject")
   dim strPath : strPath = objFileSys.BuildPath(objFileSys.GetParentFolderName(Wscript.ScriptFullName), strFilename)
   set objFile = objFileSys.openTextFile(strPath)
   executeglobal objFile.readAll()
   objFile.close
   set objFileSys = nothing
end sub

IncludeFile "tools\win\vbscript\helpers.vbs"


''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'  Global Variables                                                                                                              '
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
dim g_strPath, g_strEnvFile, g_strLogFile, g_strCfgFile
g_strPath = Left(Wscript.ScriptFullName, Len(Wscript.ScriptFullName) - Len("\configure.vbs"))
g_strEnvFile = g_strPath & "\env.bat"
g_strCfgFile = g_strPath & "\AutoConfig.kmk"
g_strLogFile = g_strPath & "\configure.log"
'g_strTmpFile = g_strPath & "\configure.tmp"


' kBuild stuff.
dim g_strPathkBuild, g_strPathkBuildBin, g_strPathDev, g_arrPathDev
g_strPathkBuild = ""
g_strPathkBuildBin = ""
g_strPathDev = ""
g_arrPathDev = Array(":placeholder:")

dim g_strTargetArch, g_StrTargetArchWin
g_strTargetArch = ""
g_StrTargetArchWin = ""

dim g_strHostArch, g_strHostArchWin
g_strHostArch = ""
g_strHostArchWin = ""

' Visual C++ info.
dim g_strPathVCC, g_strVCCVersion
g_strPathVCC = ""
g_strVCCVersion = ""

' SDK and DDK.
dim g_strPathSDK10, g_strPathPSDK, g_strVerPSDK, g_strPathDDK
g_strPathSDK10 = ""
g_strPathPSDK = ""
g_strVerPSDK = ""
g_strPathDDK = ""

' COM disabling.
dim g_blnDisableCOM, g_strDisableCOM
g_blnDisableCOM = False
g_strDisableCOM = ""

' Whether to try the internal stuff first or last.
dim g_blnInternalFirst
g_blnInternalFirst = True

' List of program files locations.
dim g_arrProgramFiles
if EnvGet("ProgramFiles(x86)") <> "" then
   g_arrProgramFiles = Array(EnvGet("ProgramFiles"), EnvGet("ProgramFiles(x86)"))
else
   g_arrProgramFiles = Array(EnvGet("ProgramFiles"))
end if



''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'  Helpers: Logging and Logged operations                                                                                        '
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

''
' Write a log header with some basic info.
sub LogInit
   FileDelete g_strLogFile
   LogPrint "# Log file generated by " & Wscript.ScriptFullName
   for i = 1 to WScript.Arguments.Count
      LogPrint "# Arg #" & i & ": " & WScript.Arguments.Item(i - 1)
   next
   if Wscript.Arguments.Count = 0 then
      LogPrint "# No arguments given"
   end if
   LogPrint "# Reconstructed command line: " & GetCommandline()

   ' some Wscript stuff
   LogPrint "# Wscript properties:"
   LogPrint "#   ScriptName: " & Wscript.ScriptName
   LogPrint "#   Version:    " & Wscript.Version
   LogPrint "#   Build:      " & Wscript.BuildVersion
   LogPrint "#   Name:       " & Wscript.Name
   LogPrint "#   Full Name:  " & Wscript.FullName
   LogPrint "#   Path:       " & Wscript.Path
   LogPrint "#"


   ' the environment
   LogPrint "# Environment:"
   dim objEnv
   for each strVar in g_objShell.Environment("PROCESS")
      LogPrint "#   " & strVar
   next
   LogPrint "#"
end sub


''
' Append text to the log file.
sub LogPrint(str)
   FileAppendLine g_strLogFile, str
   'Wscript.Echo "dbg: " & str
end sub

''
' Debug output.
sub DbgPrint(str)
   'FileAppendLine g_strLogFile, str
   'Wscript.Echo "dbg: " & str
end sub


''
' Checks if the file exists and logs failures.
function LogFileExists(strPath, strFilename)
   LogFileExists = FileExists(strPath & "/" & strFilename)
   if LogFileExists = False then
      LogPrint "Testing '" & strPath & "': " & strFilename & " not found"
   end if
end function


''
' Checks if the file exists and logs failures.
function LogFileExists1(strPath)
   LogFileExists1 = FileExists(strPath)
   if LogFileExists1 = False then
      LogPrint "Testing '" & strPath & "': file not found"
   end if
end function


''
' Checks if the directory exists and logs failures.
function LogDirExists(strPath)
   LogDirExists = DirExists(strPath)
   if LogDirExists = False then
      LogPrint "Testing '" & strPath & "': not found (or not dir)"
   end if
end function


''
' Finds the first file matching the pattern.
' If no file is found, log the failure.
function LogFindFile(strPath, strPattern)
   dim str, strOutput

   '
   ' Yes, there are some facy database kinda interface to the filesystem
   ' however, breaking down the path and constructing a usable query is
   ' too much hassle. So, we'll do it the unix way...
   '
   if Shell("dir /B """ & DosSlashes(strPath) & "\" & DosSlashes(strPattern) & """", True, strOutput) = 0 _
    And InStr(1, strOutput, Chr(13)) > 1 _
      then
      ' return the first word.
      LogFindFile = Left(strOutput, InStr(1, strOutput, Chr(13)) - 1)
   else
      LogPrint "Testing '" & strPath & "': " & strPattern & " not found"
      LogFindFile = ""
   end if
end function


''
' Finds the first directory matching the pattern.
' If no directory is found, log the failure,
' else return the complete path to the found directory.
function LogFindDir(strPath, strPattern)
   dim str, strOutput

   '
   ' Yes, there are some facy database kinda interface to the filesystem
   ' however, breaking down the path and constructing a usable query is
   ' too much hassle. So, we'll do it the unix way...
   '

   ' List the alphabetically last names as first entries (with /O-N).
   if Shell("dir /B /AD /O-N """ & DosSlashes(strPath) & "\" & DosSlashes(strPattern) & """", True, strOutput) = 0 _
    And InStr(1, strOutput, Chr(13)) > 1 _
      then
      ' return the first word.
      LogFindDir = strPath & "/" & Left(strOutput, InStr(1, strOutput, Chr(13)) - 1)
   else
      LogPrint "Testing '" & strPath & "': " & strPattern & " not found"
      LogFindDir = ""
   end if
end function


''
' Wrapper around RegGetString that logs successes.
function LogRegGetString(strName)
   LogRegGetString = RegGetString(strName)
   if LogRegGetString <> "" then LogPrint "RegGetString(" & strName & ") -> " & LogRegGetString
end function


''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'  Helpers: Configuration and Batch Script Writers                                                                               '
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

''
' Initializes the config file.
sub CfgInit
   FileDelete g_strCfgFile
   CfgPrint "# -*- Makefile -*-"
   CfgPrint "#"
   CfgPrint "# Build configuration generated by " & GetCommandline()
   CfgPrint "#"
   CfgPrintAssign "VBOX_OSE", "1"
   CfgPrintAssignRecursive "VBOX_VCC_WERR", "$(NO_SUCH_VARIABLE)"
end sub


''
' Prints a string to the config file.
sub CfgPrint(str)
   FileAppendLine g_strCfgFile, str
end sub

''
' Prints a simple assignment to the config file.
sub CfgPrintAssign(strVar, strValue)
   if strValue = "" then
      FileAppendLine g_strCfgFile, RightPad(strVar, 23) & " :="
   else
      FileAppendLine g_strCfgFile, RightPad(strVar, 23) & " := " & strValue
   end if
end sub

''
' Prints a recursive assignment to the config file.
sub CfgPrintAssignRecursive(strVar, strValue)
   FileAppendLine g_strCfgFile, RightPad(strVar, 23) & "  = " & strValue
end sub


''
' Initializes the environment batch script.
sub EnvInit
   FileDelete g_strEnvFile
   EnvPrint "@echo off"
   EnvPrint "rem"
   EnvPrint "rem Environment setup script generated by " & GetCommandline()
   EnvPrint "rem"
end sub


''
' Prints a string to the environment batch script.
sub EnvPrint(str)
   FileAppendLine g_strEnvFile, str
end sub


''
' Helper for EnvPrintPrepend and EnvPrintAppend.
sub EnvPrintCleanup(strEnv, strValue, strSep)
   dim cchValueAndSep
   FileAppendLine g_strEnvFile, "set " & strEnv & "=%" & strEnv & ":" & strSep & strValue & strSep & "=" & strSep & "%"
   cchValueAndSep = Len(strValue) + Len(strSep)
   FileAppendLine g_strEnvFile, "if ""%" & strEnv & "%""==""" & strValue & """ set " & strEnv & "="
   FileAppendLine g_strEnvFile, "if ""%" & strEnv & ":~0," & cchValueAndSep & "%""==""" & strValue & strSep & """ set " & strEnv & "=%" & strEnv & ":~" & cchValueAndSep & "%"
   FileAppendLine g_strEnvFile, "if ""%" & strEnv & ":~-"  & cchValueAndSep & "%""==""" & strSep & strValue & """  set " & strEnv & "=%" & strEnv & ":~0,-" & cchValueAndSep & "%"
end sub


'' Use by EnvPrintPrepend to skip ';' stripping.
dim g_strPrependCleanEnvVars

''
' Print a statement prepending strValue to strEnv, removing duplicate values.
sub EnvPrintPrepend(strEnv, strValue, strSep)
   ' Remove old values and any leading separators.
   EnvPrintCleanup strEnv, strValue, strSep
   if InStr(1, g_strPrependCleanEnvVars, "|" & strEnv & "|") = 0 then
      FileAppendLine g_strEnvFile, "if ""%" & strEnv & ":~0,1%""==""" & strSep & """ set " & strEnv & "=%" & strEnv & ":~1%"
      FileAppendLine g_strEnvFile, "if ""%" & strEnv & ":~0,1%""==""" & strSep & """ set " & strEnv & "=%" & strEnv & ":~1%"
      g_strPrependCleanEnvVars = g_strPrependCleanEnvVars & "|" & strEnv & "|"
   end if
   ' Do the setting
   FileAppendLine g_strEnvFile, "set " & strEnv & "=" & strValue & strSep & "%" & strEnv & "%"
end sub


'' Use by EnvPrintPrepend to skip ';' stripping.
dim g_strAppendCleanEnvVars

''
' Print a statement appending strValue to strEnv, removing duplicate values.
sub EnvPrintAppend(strEnv, strValue, strSep)
   ' Remove old values and any trailing separators.
   EnvPrintCleanup strEnv, strValue, strSep
   if InStr(1, g_strAppendCleanEnvVars, "|" & strEnv & "|") = 0 then
      FileAppendLine g_strEnvFile, "if ""%" & strEnv & ":~-1%""==""" & strSep & """ set " & strEnv & "=%" & strEnv & ":~0,-1%"
      FileAppendLine g_strEnvFile, "if ""%" & strEnv & ":~-1%""==""" & strSep & """ set " & strEnv & "=%" & strEnv & ":~0,-1%"
      g_strAppendCleanEnvVars = g_strAppendCleanEnvVars & "|" & strEnv & "|"
   end if
   ' Do the setting.
   FileAppendLine g_strEnvFile, "set " & strEnv & "=%" & strEnv & "%" & strSep & strValue
end sub


''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'  Feature disabling                                                                                                             '
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

''
' No COM
sub DisableCOM(strReason)
   if g_blnDisableCOM = False then
      LogPrint "Disabled COM components: " & strReason
      g_blnDisableCOM = True
      g_strDisableCOM = strReason
      CfgPrintAssign "VBOX_WITH_MAIN", ""
      CfgPrintAssign "VBOX_WITH_QTGUI", ""
      CfgPrintAssign "VBOX_WITH_VBOXSDL", ""
      CfgPrintAssign "VBOX_WITH_DEBUGGER_GUI", ""
   end if
end sub


''
' No UDPTunnel
sub DisableUDPTunnel(strReason)
   if g_blnDisableUDPTunnel = False then
      LogPrint "Disabled UDPTunnel network transport: " & strReason
      g_blnDisableUDPTunnel = True
      g_strDisableUDPTunnel = strReason
      CfgPrintAssign "VBOX_WITH_UDPTUNNEL", ""
   end if
end sub


''
' No SDL
sub DisableSDL(strReason)
   if g_blnDisableSDL = False then
      LogPrint "Disabled SDL frontend: " & strReason
      g_blnDisableSDL = True
      g_strDisableSDL = strReason
      CfgPrintAssign "VBOX_WITH_VBOXSDL", ""
   end if
end sub


''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'  Tool/Library Locating and Checking                                                                                            '
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

''
' Generic helper for looking for a tools under g_strPathDev.
'
' The callback function takes the '.../tools/win.arch/tool/version' dir and
' varUser as arguments, returning an non-empty string if it was found suitable.
'
function SearchToolsEx(strTool, strVerPrefix, ByRef fnCallback, ByRef varUser, ByRef arrToolsDirs)
   dim strToolsDir, arrDirs, strDir
   SearchToolsEx = ""
   for each strToolsDir in arrToolsDirs
      arrDirs = GetSubdirsStartingWithRVerSorted(strToolsDir, strVerPrefix)
      for each strDir in arrDirs
         SearchToolsEx = fnCallback(strToolsDir & "/" & strDir, varUser)
         if SearchToolsEx <> "" then
            exit function
         end if
      next
   next
end function

'' Search under g_strPathDev for a tool, target arch only.
function SearchTargetTools(strTool, strVerPrefix, ByRef fnCallback, ByRef varUser)
   dim i
   redim arrToolsDirs(ArraySize(g_arrPathDev) - 1)
   for i = 0 to UBound(g_arrPathDev)
      arrToolsDirs(i) = g_arrPathDev(i) & "/win." & g_strTargetArch & "/" & strTool
   next
   SearchTargetTools = SearchToolsEx(strTool, strVerPrefix, fnCallback, varUser, arrToolsDirs)
end function

'' Search under g_strPathDev for a tool, target arch and alternative arches.
function SearchTargetPlusTools(strTool, strVerPrefix, ByRef fnCallback, ByRef varUser)
   dim i
   redim arrToolsDirs(ArraySize(g_arrPathDev)*3 - 1)
   for i = 0 to UBound(g_arrPathDev)
      arrToolsDirs(i*3 + 0) = g_arrPathDev(i) & "/win." & g_strTargetArch & "/" & strTool
      arrToolsDirs(i*3 + 1) = g_arrPathDev(i) & "/win.x86/" & strTool
      arrToolsDirs(i*3 + 2) = g_arrPathDev(i) & "/win.amd64/" & strTool
   next
   SearchTargetPlusTools = SearchToolsEx(strTool, strVerPrefix, fnCallback, varUser, arrToolsDirs)
end function

'' Search under g_strPathDev for a tool, host arch first.
function SearchHostTools(strTool, strVerPrefix, ByRef fnCallback, ByRef varUser)
   dim i
   redim arrToolsDirs(ArraySize(g_arrPathDev) * 3 - 1)
   for i = 0 to UBound(g_arrPathDev)
      arrToolsDirs(i*3 + 0) = g_arrPathDev(i) & "/win." & g_strHostArch & "/" & strTool
      arrToolsDirs(i*3 + 1) = g_arrPathDev(i) & "/win.x86/" & strTool
      arrToolsDirs(i*3 + 2) = g_arrPathDev(i) & "/win.amd64/" & strTool
   next
   SearchHostTools = SearchToolsEx(strTool, strVerPrefix, fnCallback, varUser, arrToolsDirs)
end function

'' Search under g_strPathDev for a tool, common dir first.
function SearchCommonTools(strTool, strVerPrefix, ByRef fnCallback, ByRef varUser)
   dim i
   redim arrToolsDirs(ArraySize(g_arrPathDev) * 4 - 1)
   for i = 0 to UBound(g_arrPathDev)
      arrToolsDirs(i*4 + 0) = g_arrPathDev(i) & "/win.common/" & strTool
      arrToolsDirs(i*4 + 1) = g_arrPathDev(i) & "/win." & g_strTargetArch & "/" & strTool
      arrToolsDirs(i*4 + 2) = g_arrPathDev(i) & "/win.x86/" & strTool
      arrToolsDirs(i*4 + 3) = g_arrPathDev(i) & "/win.amd64/" & strTool
   next
   SearchCommonTools = SearchToolsEx(strTool, strVerPrefix, fnCallback, varUser, arrToolsDirs)
end function

''
' Checks the the path doesn't contain characters the tools cannot deal with.
'
sub CheckSourcePath
   dim sPwd

   sPwd = PathAbsLong(g_strPath)    ' Must check the long version.
   if InStr(1, sPwd, " ") > 0 then
      MsgError "Source path contains spaces! Please move it. (" & sPwd & ")"
   end if
   if InStr(1, sPwd, "$") > 0 then
      MsgError "Source path contains the '$' char! Please move it. (" & sPwd & ")"
   end if
   if InStr(1, sPwd, "%") > 0 then
      MsgError "Source path contains the '%' char! Please move it. (" & sPwd & ")"
   end if
   if  InStr(1, sPwd, Chr(10)) > 0 _
    or InStr(1, sPwd, Chr(13)) > 0 _
    or InStr(1, sPwd, Chr(9)) > 0 _
   then
      MsgError "Source path contains control characters! Please move it. (" & sPwd & ")"
   end if
   Print "Source path: OK"
end sub


''
' Checks for kBuild - very simple :)
'
sub CheckForkBuild(strOptkBuild)
   dim blnNeedEnvVars, strOutput
   PrintHdr "kBuild"

   '
   ' Check if there is a 'kmk' in the path somewhere without
   ' any KBUILD_*PATH stuff around.
   '
   blnNeedEnvVars = True
   g_strPathkBuild = strOptkBuild
   g_strPathkBuildBin = ""
   if   (g_strPathkBuild = "") _
    And (EnvGetFirst("KBUILD_PATH", "PATH_KBUILD") = "") _
    And (EnvGetFirst("KBUILD_BIN_PATH", "PATH_KBUILD_BIN") = "") _
    And (Shell("kmk.exe --version", True, strOutput) = 0) _
    And (InStr(1,strOutput, "kBuild Make 0.1") > 0) _
    And (InStr(1,strOutput, "KBUILD_PATH") > 0) _
    And (InStr(1,strOutput, "KBUILD_BIN_PATH") > 0) then
      '' @todo Need to parse out the KBUILD_PATH and KBUILD_BIN_PATH values to complete the other tests.
      'blnNeedEnvVars = False
      MsgWarning "You've installed kBuild it seems. configure.vbs hasn't been updated to " _
         & "deal with that yet and will use the one it ships with. Sorry."
   end if

   '
   ' Check for the KBUILD_PATH env.var. and fall back on root/kBuild otherwise.
   '
   if g_strPathkBuild = "" then
      g_strPathkBuild = EnvGetFirst("KBUILD_PATH", "PATH_KBUILD")
      if (g_strPathkBuild <> "") and (FileExists(g_strPathkBuild & "/footer.kmk") = False) then
         MsgWarning "Ignoring incorrect kBuild path (KBUILD_PATH=" & g_strPathkBuild & ")"
         g_strPathkBuild = ""
      end if

      if g_strPathkBuild = "" then
         g_strPathkBuild = g_strPath & "/kBuild"
      end if
   end if

   g_strPathkBuild = UnixSlashes(PathAbs(g_strPathkBuild))

   '
   ' Check for env.vars that kBuild uses (do this early to set g_strTargetArch).
   '
   str = EnvGetFirst("KBUILD_TYPE", "BUILD_TYPE")
   if   (str <> "") _
    And (InStr(1, "|release|debug|profile|kprofile", str) <= 0) then
      EnvPrint "set KBUILD_TYPE=release"
      EnvSet "KBUILD_TYPE", "release"
      MsgWarning "Found unknown KBUILD_TYPE value '" & str &"' in your environment. Setting it to 'release'."
   end if

   str = EnvGetFirst("KBUILD_TARGET", "BUILD_TARGET")
   if   (str <> "") _
    And (InStr(1, "win|win32|win64", str) <= 0) then '' @todo later only 'win' will be valid. remember to fix this check!
      EnvPrint "set KBUILD_TARGET=win"
      EnvSet "KBUILD_TARGET", "win"
      MsgWarning "Found unknown KBUILD_TARGET value '" & str &"' in your environment. Setting it to 'win32'."
   end if

   str = EnvGetFirst("KBUILD_TARGET_ARCH", "BUILD_TARGET_ARCH")
   if   (str <> "") _
    And (InStr(1, "x86|amd64", str) <= 0) then
      EnvPrint "set KBUILD_TARGET_ARCH=x86"
      EnvSet "KBUILD_TARGET_ARCH", "x86"
      MsgWarning "Found unknown KBUILD_TARGET_ARCH value '" & str &"' in your environment. Setting it to 'x86'."
      str = "x86"
   end if
   if g_strTargetArch = "" then '' command line parameter --target-arch=x86|amd64 has priority
      if str <> "" then
         g_strTargetArch = str
      elseif (EnvGet("PROCESSOR_ARCHITEW6432") = "AMD64" ) _
          Or (EnvGet("PROCESSOR_ARCHITECTURE") = "AMD64" ) then
         g_strTargetArch = "amd64"
      else
         g_strTargetArch = "x86"
      end if
   else
      if InStr(1, "x86|amd64", g_strTargetArch) <= 0 then
         EnvPrint "set KBUILD_TARGET_ARCH=x86"
         EnvSet "KBUILD_TARGET_ARCH", "x86"
         MsgWarning "Unknown --target-arch=" & str &". Setting it to 'x86'."
      end if
   end if
   LogPrint " Target architecture: " & g_strTargetArch & "."
   Wscript.Echo " Target architecture: " & g_strTargetArch & "."
   EnvPrint "set KBUILD_TARGET_ARCH=" & g_strTargetArch

   ' Windows variant of the arch name.
   g_strTargetArchWin = g_strTargetArch
   if g_strTargetArchWin = "amd64" then g_strTargetArchWin = "x64"

   str = EnvGetFirst("KBUILD_TARGET_CPU", "BUILD_TARGET_CPU")
    ' perhaps a bit pedantic this since this isn't clearly define nor used much...
   if   (str <> "") _
    And (InStr(1, "i386|i486|i686|i786|i868|k5|k6|k7|k8", str) <= 0) then
      EnvPrint "set BUILD_TARGET_CPU=i386"
      EnvSet "KBUILD_TARGET_CPU", "i386"
      MsgWarning "Found unknown KBUILD_TARGET_CPU value '" & str &"' in your environment. Setting it to 'i386'."
   end if

   str = EnvGetFirst("KBUILD_HOST", "BUILD_PLATFORM")
   if   (str <> "") _
    And (InStr(1, "win|win32|win64", str) <= 0) then '' @todo later only 'win' will be valid. remember to fix this check!
      EnvPrint "set KBUILD_HOST=win"
      EnvSet "KBUILD_HOST", "win"
      MsgWarning "Found unknown KBUILD_HOST value '" & str &"' in your environment. Setting it to 'win32'."
   end if

   str = EnvGetFirst("KBUILD_HOST_ARCH", "BUILD_PLATFORM_ARCH")
   if str <> "" then
      if InStr(1, "x86|amd64", str) <= 0 then
         str = "x86"
         MsgWarning "Found unknown KBUILD_HOST_ARCH value '" & str &"' in your environment. Setting it to 'x86'."
      end if
   elseif (EnvGet("PROCESSOR_ARCHITEW6432") = "AMD64" ) _
       Or (EnvGet("PROCESSOR_ARCHITECTURE") = "AMD64" ) then
      str = "amd64"
   else
      str = "x86"
   end if
   LogPrint " Host architecture: " & str & "."
   Wscript.Echo " Host architecture: " & str & "."
   EnvPrint "set KBUILD_HOST_ARCH=" & str
   g_strHostArch = str

   ' Windows variant of the arch name.
   g_strHostArchWin = g_strHostArch
   if g_strHostArchWin = "amd64" then g_strHostArchWin = "x64"


   str = EnvGetFirst("KBUILD_HOST_CPU", "BUILD_PLATFORM_CPU")
    ' perhaps a bit pedantic this since this isn't clearly define nor used much...
   if   (str <> "") _
    And (InStr(1, "i386|i486|i686|i786|i868|k5|k6|k7|k8", str) <= 0) then
      EnvPrint "set KBUILD_HOST_CPU=i386"
      EnvSet "KBUILD_HOST_CPU", "i386"
      MsgWarning "Found unknown KBUILD_HOST_CPU value '" & str &"' in your environment. Setting it to 'i386'."
   end if

   '
   ' Determin the location of the kBuild binaries.
   '
   if g_strPathkBuildBin = "" then
      g_strPathkBuildBin = g_strPathkBuild & "/bin/win." & g_strHostArch
      if FileExists(g_strPathkBuildBin & "/kmk.exe") = False then
         g_strPathkBuildBin = g_strPathkBuild & "/bin/win.x86"
      end if
   end if
   g_strPathkBuildBin = UnixSlashes(PathAbs(g_strPathkBuildBin))

   '
   ' Perform basic validations of the kBuild installation.
   '
   if  (FileExists(g_strPathkBuild & "/footer.kmk") = False) _
    Or (FileExists(g_strPathkBuild & "/header.kmk") = False) _
    Or (FileExists(g_strPathkBuild & "/rules.kmk") = False) then
      MsgFatal "Can't find valid kBuild at '" & g_strPathkBuild & "'. Either there is an " _
         & "incorrect KBUILD_PATH in the environment or the checkout didn't succeed."
      exit sub
   end if
   if  (FileExists(g_strPathkBuildBin & "/kmk.exe") = False) _
    Or (FileExists(g_strPathkBuildBin & "/kmk_ash.exe") = False) then
      MsgFatal "Can't find valid kBuild binaries at '" & g_strPathkBuildBin & "'. Either there is an " _
         & "incorrect KBUILD_PATH in the environment or the checkout didn't succeed."
      exit sub
   end if

   if (Shell(DosSlashes(g_strPathkBuildBin & "/kmk.exe") & " --version", True, strOutput) <> 0) then
      MsgFatal "Can't execute '" & g_strPathkBuildBin & "/kmk.exe --version'. check configure.log for the out."
      exit sub
   end if

   '
   ' If KBUILD_DEVTOOLS is set, check that it's pointing to something useful.
   '
   str = UnixSlashes(EnvGet("KBUILD_DEVTOOLS"))
   g_strPathDev = str
   if   str <> "" _
    and LogDirExists(str & "/bin") _
    and LogDirExists(str & "/win.amd64/bin") _
    and LogDirExists(str & "/win.x86/bin") _
   then
      LogPrint "Found KBUILD_DEVTOOLS='" & str & "'."
   elseif str <> "" then
      MsgWarning "Ignoring bogus KBUILD_DEVTOOLS='" & str &"' in your environment!"
      g_strPathDev = strNew
   end if
   if g_strPathDev = "" then
      g_strPathDev = UnixSlashes(g_strPath & "/tools")
      LogPrint "Using KBUILD_DEVTOOLS='" & g_strPathDev & "'."
      if str <> "" then
         EnvPrint "set KBUILD_DEVTOOLS=" & g_strPathDev
         EnvSet "KBUILD_DEVTOOLS", g_strPathDev
      end if
   end if
   g_arrPathDev(ArrayFindString(g_arrPathDev, ":placeholder:")) = g_strPathDev

   '
   ' Write KBUILD_PATH and updated PATH to the environment script if necessary.
   '
   if blnNeedEnvVars = True then
      EnvPrint "set KBUILD_PATH=" & g_strPathkBuild
      EnvSet "KBUILD_PATH", g_strPathkBuild

      if Right(g_strPathkBuildBin, 7) = "win.x86" then
         EnvPrintCleanup "PATH", DosSlashes(Left(g_strPathkBuildBin, Len(g_strPathkBuildBin) - 7) & "win.amd64"), ";"
      end if
      if Right(g_strPathkBuildBin, 9) = "win.amd64" then
         EnvPrintCleanup "PATH", DosSlashes(Left(g_strPathkBuildBin, Len(g_strPathkBuildBin) - 9) & "win.x86"), ";"
      end if
      EnvPrintPrepend "PATH", DosSlashes(g_strPathkBuildBin), ";"
      EnvPrependPathItem "PATH", g_strPathkBuildBin, ";"
   end if

   PrintResult "kBuild", g_strPathkBuild
   PrintResult "kBuild binaries", g_strPathkBuildBin
end sub


''
' Checks for Visual C++ version 16 (2019), 15 (2017), 14 (2015), 12 (2013), 11 (2012) or 10 (2010).
'
sub CheckForVisualCPP(strOptVC, strOptVCCommon)
   PrintHdr "Visual C++"

   '
   ' Try find it...
   '
   dim objState, strProgFiles
   set objState = new VisualCPPState
   objState.check strOptVC, strOptVCCommon
   if g_blnInternalFirst = True then objState.checkInternal
   objState.checkProgItems "2019"
   objState.checkProgFiles "Microsoft Visual Studio\2019\BuildTools\VC"
   objState.checkProgFiles "Microsoft Visual Studio\2019\Professional\VC"
   objState.checkProgFiles "Microsoft Visual Studio\2019\Community\VC"
   objState.checkRegistry "Microsoft\VisualStudio\SxS\VS7\16.0",             "VC", ""        ' doesn't work.
   objState.checkProgItems "2017"
   objState.checkProgFiles "Microsoft Visual Studio\2017\BuildTools\VC"
   objState.checkProgFiles "Microsoft Visual Studio\2017\Professional\VC"
   objState.checkProgFiles "Microsoft Visual Studio\2017\Community\VC"
   objState.checkProgFiles "Microsoft Visual Studio\2017\Express\VC"
   objState.checkRegistry "Microsoft\VisualStudio\SxS\VS7\15.0",             "VC", ""
   objState.checkRegistry "Microsoft\VisualStudio\SxS\VS7\14.0",             "VC", "Common7"
   objState.checkRegistry "Microsoft\VisualStudio\SxS\VS7\12.0",             "VC", "Common7" '?
   objState.checkRegistry "Microsoft\VisualStudio\SxS\VS7\11.0",             "VC", "Common7" '?
   objState.checkProg "cl.exe"
   objState.checkRegistry "Microsoft\VisualStudio\10.0\Setup\VS\ProductDir", "VC", "Common7"
   if g_blnInternalFirst = False then objState.checkInternal

   if objState.m_blnFound = False then
      MsgError "Cannot find cl.exe (Visual C++) anywhere on your system. Check the build requirements."
      exit sub
   end if
   g_strPathVCC = objState.m_strPathVC
   g_strVCCVersion = objState.m_strVersion

   '
   ' Ok, emit build config variables.
   '
   CfgPrintAssign "VBOX_VCC_TOOL_STEM", objState.m_strVersion
   CfgPrintAssign "PATH_TOOL_" & objState.m_strVersion, g_strPathVCC
   CfgPrintAssign "PATH_TOOL_" & objState.m_strVersion & "X86",   "$(PATH_TOOL_" & objState.m_strVersion & ")"
   CfgPrintAssign "PATH_TOOL_" & objState.m_strVersion & "AMD64", "$(PATH_TOOL_" & objState.m_strVersion & ")"

   if   objState.m_strVersion = "VCC100" _
     or objState.m_strVersion = "VCC110" _
     or objState.m_strVersion = "VCC120" _
     or objState.m_strVersion = "VCC140" _
   then
      CfgPrintAssign "VBOX_WITH_NEW_VCC", "" '?? for VCC110+
   else
      CfgPrintAssign "VBOX_WITH_NEW_VCC", "1"
   end if
   PrintResult "Visual C++ " & objState.m_strVersion, g_strPathVCC

   ' And the env.bat path fix.
   if objState.m_strPathVCCommon <> "" then
      EnvPrintAppend "PATH", DosSlashes(objState.m_strPathVCCommon) & "\IDE", ";"
   end if
end sub

'' Class we use for detecting Visual C++
class VisualCPPState
   public m_blnFound
   public m_strPathVC
   public m_strPathVCCommon
   public m_strVersion
   public m_strClVersion
   public m_blnNewLayout

   private sub Class_Initialize
      m_blnFound        = False
      m_strPathVC       = ""
      m_strPathVCCommon = ""
      m_strVersion      = ""
      m_strClVersion    = ""
      m_blnNewLayout    = false
   end sub

   public function checkClExe(strClExe)
      ' We'll have to make sure mspdbXX.dll is somewhere in the PATH.
      dim strSavedPath, rcExit, strOutput

      strSavedPath = EnvGet("PATH")
      if (m_strPathVCCommon <> "") then
         EnvAppendPathItem "PATH", m_strPathVCCommon & "/IDE", ";"
      end if
      rcExit = Shell(DosSlashes(strClExe), True, strOutput)
      EnvSet "PATH", strSavedPath

      checkClExe = False
      if rcExit = 0 then
         ' Extract the ' Version xx.yy.build.zz for arch' bit.
         dim offVer, offEol, strVer
         strVer = ""
         offVer = InStr(1, strOutput, " Version ")
         if offVer > 0 then
            offVer = offVer + Len(" Version ")
            offEol = InStr(offVer, strOutput, Chr(13))
            if offEol > 0 then
               strVer = Trim(Mid(strOutput, offVer, offEol - offVer))
            end if
         end if

         ' Check that it's a supported version
         checkClExe = True
         if InStr(1, strVer, "16.") = 1 then
            m_strVersion = "VCC100"
         elseif InStr(1, strVer, "17.") = 1 then
            m_strVersion = "VCC110"
            LogPrint "The Visual C++ compiler ('" & strClExe & "') version isn't really supported, but may work: " & strVer
         elseif InStr(1, strVer, "18.") = 1 then
            m_strVersion = "VCC120"
            LogPrint "The Visual C++ compiler ('" & strClExe & "') version isn't really supported, but may work: " & strVer
         elseif InStr(1, strVer, "19.0") = 1 then
            m_strVersion = "VCC140"
            LogPrint "The Visual C++ compiler ('" & strClExe & "') version isn't really supported, but may work: " & strVer
         elseif InStr(1, strVer, "19.1") = 1 then
            m_strVersion = "VCC141"
            LogPrint "The Visual C++ compiler ('" & strClExe & "') version isn't really supported, but may work: " & strVer
         elseif InStr(1, strVer, "19.2") = 1 then
            m_strVersion = "VCC142"
         else
            LogPrint "The Visual C++ compiler we found ('" & strClExe & "') isn't in the 10.0-19.2x range (" & strVer & ")."
            LogPrint "Check the build requirements and select the appropriate compiler version."
            checkClExe = False
            exit function
         end if
         LogPrint "'" & strClExe & "' = " & m_strVersion & " (" & strVer & ")"
      else
         LogPrint "Executing '" & strClExe & "' (which we believe to be the Visual C++ compiler driver) failed (rcExit=" & rcExit & ")."
      end if
   end function

   public function checkInner(strPathVC) ' For the new layout only
      if m_blnFound = False then
         if   LogDirExists(strPathVC & "/bin") _
          and LogDirExists(strPathVC & "/lib") _
          and LogDirExists(strPathVC & "/include") _
          and LogFileExists(strPathVC, "include/stdarg.h") _
          and LogFileExists(strPathVC, "lib/x64/libcpmt.lib") _
          and LogFileExists(strPathVC, "lib/x86/libcpmt.lib") _
          and LogFileExists(strPathVC, "bin/Host" & g_strHostArchWin & "/" & g_strTargetArchWin & "/cl.exe") _
          and LogFileExists(strPathVC, "bin/Host" & g_strHostArchWin & "/" & g_strHostArchWin & "/cl.exe") _
         then
            LogPrint " => seems okay. new layout."
            m_blnFound = checkClExe(strPathVC & "/bin/Host" & g_strHostArchWin & "/" & g_strTargetArchWin & "/cl.exe")
            if m_blnFound then
               m_strPathVC = strPathVC
            end if
         end if
      end if
      checkInner = m_blnFound
   end function

   public function check(strPathVC, strPathVCommon)
      if (m_blnFound = False) and (strPathVC <> "") then
         m_strPathVC       = UnixSlashes(PathAbs(strPathVC))
         m_strPathVCCommon = strPathVCCommon
         m_strVersion      = ""

         LogPrint "Trying: strPathVC=" & m_strPathVC & " strPathVCCommon=" & m_strPathVCCommon
         if LogDirExists(m_strPathVC) then
            ' 15.0+ layout?  This is fun because of the multiple CL versions (/tools/msvc/xx.yy.bbbbb/).
            ' OTOH, the user may have pointed us directly to one of them.
            if LogDirExists(m_strPathVC & "/Tools/MSVC") then
               m_blnNewLayout = True
               LogPrint " => seems okay. new layout."
               dim arrFolders, i
               arrFolders = GetSubdirsStartingWithVerSorted(m_strPathVC & "/Tools/MSVC", "14.2")
               if UBound(arrFolders) < 0 then arrFolders = GetSubdirsStartingWithVerSorted(m_strPathVC & "/Tools/MSVC", "14.1")
               if UBound(arrFolders) < 0 then arrFolders = GetSubdirsStartingWithVerSorted(m_strPathVC & "/Tools/MSVC", "1")
               for i = UBound(arrFolders) to LBound(arrFolders) step -1
                  if checkInner(m_strPathVC & "/Tools/MSVC/" & arrFolders(i)) then exit for ' modifies m_strPathVC on success
               next
            elseif LogDirExists(m_strPathVC & "/bin/HostX64") _
                or LogDirExists(m_strPathVC & "/bin/HostX86") then
               checkInner(m_strPathVC)
            ' 14.0 and older layout?
            elseif LogFileExists(m_strPathVC, "/bin/cl.exe") then
               m_blnNewLayout = False
               if   LogFileExists(m_strPathVC, "bin/link.exe") _
                and LogFileExists(m_strPathVC, "include/string.h") _
                and LogFileExists(m_strPathVC, "lib/libcmt.lib") _
                and LogFileExists(m_strPathVC, "lib/msvcrt.lib") _
               then
                  LogPrint " => seems okay. old layout."
                  m_blnFound = checkClExe(m_strPathVC & "/bin/cl.exe")
               end if
            end if
         end if
      end if
      check = m_bldFound
   end function

   public function checkProg(strProg)
      if m_blnFound = False then
         dim str, i, offNewLayout
         str = Which(strProg)
         if str <> "" then
            LogPrint "checkProg: '" & strProg & "' -> '" & str & "'"
            if FileExists(PathStripFilename(str) & "/build.exe") then
               Warning "Ignoring DDK cl.exe (" & str & ")." ' don't know how to deal with this cl.
            else
               ' Assume we've got cl.exe from somewhere under the 'bin' directory..
               m_strPathVC = PathParent(PathStripFilename(str))
               for i = 1 To 5
                  if LogDirExists(m_strPathVC & "/include") then
                     m_strPathVCCommon = PathParent(m_strPathVC) & "/Common7"
                     if DirExists(m_strPathVCCommon) = False then
                        m_strPathVCCommon = ""
                        ' New layout?
                        offNewLayout = InStr(1, LCase(DosSlashes(m_strPathVC)), "\tools\msvc\")
                        if offNewLayout > 0 then m_strPathVC = Left(m_strPathVC, offNewLayout)
                     end if
                     check m_strPathVC, m_strPathVCCommon
                     exit for
                  end if
                  m_strPathVC = PathParent(m_strPathVC)
               next
            end if
         end if
      end if
      checkProg = m_bldFound
   end function

   public function checkProgFiles(strSubdir)
      if m_blnFound = False then
         dim strProgFiles
         for each strProgFiles in g_arrProgramFiles
            check strProgFiles & "/" & strSubdir, ""
         next
      end if
      checkProgFiles = m_blnFound
   end function

   public function checkRegistry(strValueNm, strVCSubdir, strVCommonSubdir)
      if m_blnFound = False then
         dim str, strPrefix, arrPrefixes
         arrPrefixes = Array("HKLM\SOFTWARE\Wow6432Node\", "HKLM\SOFTWARE\", "HKCU\SOFTWARE\Wow6432Node\", "HKCU\SOFTWARE\")
         for each strPrefix in arrPrefixes
            str = LogRegGetString(strPrefix & strValueNm)
            if str <> "" then
               LogPrint "checkRegistry: '" & strPrefix & strValueNm & "' -> '" & str & "'"
               if check(str & strVCSubdir, str & strVCommonSubdir) = True then
                  exit for
               end if
            end if
         next
      end if
      checkRegistry = m_bldFound
   end function

   public function checkProgItems(strVersionYear)
      if m_blnFound = False then
         dim strCandidate
         for each strCandidate in CollectFromProgramItemLinks(GetRef("VisualCPPCallback"), strVersionYear)
            check strCandidate, ""
         next
      end if
      checkProgItems = m_blnFound
   end function

   public function checkInternal
      dim strPathDev
      for each strPathDev in g_arrPathDev : check strPathDev & "/win.amd64/vcc/v14.2",  "" : next
      for each strPathDev in g_arrPathDev : check strPathDev & "/win.amd64/vcc/v14.2",  "" : next
      for each strPathDev in g_arrPathDev : check strPathDev & "/win.amd64/vcc/v14.1",  "" : next
      for each strPathDev in g_arrPathDev : check strPathDev & "/win.amd64/vcc/v14.0",  "" : next
      for each strPathDev in g_arrPathDev : check strPathDev & "/win.amd64/vcc/v10sp1", "" : next
      for each strPathDev in g_arrPathDev : check strPathDev & "/win.x86/vcc/v10sp1",   "" : next
      checkInternal = m_blnFound
   end function
end class

' See checkProgItems()
function VisualCPPCallback(ByRef arrStrings, cStrings, ByRef strVersionYear)
   VisualCPPCallback = ""
   ' We're looking for items with three strings like this:
   '   C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Visual Studio 2019\Visual Studio Tools\VC\x64 Native Tools Command Prompt for VS 2019.lnk
   '   C:\Windows\system32\cmd.exe
   '   /k "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\Build\vcvars64.bat"
   if cStrings >= 3 then
      if InStr(1, arrStrings(0), strVersionYear) > 0 then
         dim strTail : strTail = "\Auxiliary\Build\vcvars64.bat"""
         dim str     : str     = arrStrings(UBound(arrStrings))
         if StrComp(Right(str, Len(strTail)), strTail, vbTextCompare) = 0 then
            dim offColon : offColon = InStr(1, str, ":")
            if offColon > 1 then
               VisualCPPCallback = Mid(str, offColon - 1, Len(str) - (offColon - 2) - Len(strTail))
            end if
         end if
      end if
   end if
end function


''
' Checks for a windows 10 SDK (later also WDK).
'
sub CheckForSDK10(strOptSDK10, strOptSDK10Version)
   dim strPathSDK10, strSDK10Version, str
   PrintHdr "Windows 10 SDK/WDK"
   '' @todo implement strOptSDK10Version

   '
   ' Try find the Windows 10 kit.
   '
   strSDK10Version = ""
   strPathSDK10 = CheckForSDK10Sub(strOptSDK10, strSDK10Version)
   if strPathSDK10 = "" and g_blnInternalFirst = true then
      strPathSDK10 = SearchTargetPlusTools("sdk", "v10.", GetRef("CheckForSDK10Sub"), strSDK10Version)
   end if

   if strPathSDK10 = "" then
      str = LogRegGetString("HKLM\SOFTWARE\Microsoft\Windows Kits\Installed Roots\KitsRoot10")
      strPathSDK10 = CheckForSDK10Sub(str, strSDK10Version)
   end if
   if strPathSDK10 = "" then
      for each str in g_arrProgramFiles
         strPathSDK10 = CheckForSDK10Sub(str & "/Windows Kits/10", strSDK10Version)
         if strPathSDK10 <> "" then exit for
      next
   end if
   if strPathSDK10 = "" and g_blnInternalFirst = true then
      strPathSDK10 = SearchTargetPlusTools("sdk", "v10.", GetRef("CheckForSDK10Sub"), strSDK10Version)
   end if

   if strPathSDK10 = "" then
      MsgError "Cannot find a suitable Windows 10 SDK.  Check configure.log and the build requirements."
      exit sub
   end if

   '
   ' Emit the config.
   '
   strPathSDK10 = UnixSlashes(PathAbs(strPathSDK10))
   CfgPrintAssign "PATH_SDK_WINSDK10", strPathSDK10
   CfgPrintAssign "SDK_WINSDK10_VERSION", strSDK10Version

   PrintResult "Windows 10 SDK", strPathSDK10
   PrintResultMsg "Windows 10 SDK version", strSDK10Version
   g_strPathSDK10 = strPathSDK10
end sub

'' Checks if the specified path points to a usable Windows 10 SDK/WDK.
function CheckForSDK10Sub(strPathSDK10, ByRef strSDK10Version)
   CheckForSDK10Sub = ""
   if strPathSDK10 <> "" then
      LogPrint "Trying: strPathSDK10=" & strPathSDK10
      if LogDirExists(strPathSDK10) then
         if   LogDirExists(strPathSDK10 & "/Bin") _
          and LogDirExists(strPathSDK10 & "/Include") _
          and LogDirExists(strPathSDK10 & "/Lib") _
          and LogDirExists(strPathSDK10 & "/Redist") _
         then
            ' Only testing the highest one, for now. '' @todo incorporate strOptSDK10Version
            dim arrVersions
            arrVersions = GetSubdirsStartingWithVerSorted(strPathSDK10 & "/Include", "10.0.")
            if UBound(arrVersions) >= 0 then
               dim strVersion
               strVersion = arrVersions(UBound(arrVersions))
               LogPrint "Trying version: " & strVersion
               if    LogFileExists(strPathSDK10, "include/" & strVersion & "/um/Windows.h") _
                and  LogFileExists(strPathSDK10, "include/" & strVersion & "/ucrt/malloc.h") _
                and  LogFileExists(strPathSDK10, "include/" & strVersion & "/ucrt/stdio.h") _
                and  LogFileExists(strPathSDK10, "lib/" & strVersion & "/um/"   & g_strTargetArchWin & "/kernel32.lib") _
                and  LogFileExists(strPathSDK10, "lib/" & strVersion & "/um/"   & g_strTargetArchWin & "/user32.lib") _
                and  LogFileExists(strPathSDK10, "lib/" & strVersion & "/ucrt/" & g_strTargetArchWin & "/libucrt.lib") _
                and  LogFileExists(strPathSDK10, "lib/" & strVersion & "/ucrt/" & g_strTargetArchWin & "/ucrt.lib") _
                and  LogFileExists(strPathSDK10, "bin/" & strVersion & "/" & g_strHostArchWin & "/rc.exe") _
                and  LogFileExists(strPathSDK10, "bin/" & strVersion & "/" & g_strHostArchWin & "/midl.exe") _
               then
                  if StrComp(strVersion, "10.0.17134.0") >= 0 then
                     strSDK10Version  = strVersion
                     CheckForSDK10Sub = strPathSDK10
                  else
                     LogPrint "Version " & strVersion & " is too low, minimum: 10.0.17134.0"
                  end if
               end if
            else
               LogPrint "Found no 10.0.* subdirectories under '" & strPathSDK10 & "/Include'!"
            end if
         end if
      end if
   end if
end function


''
' Locating a Windows 7 Driver Kit.
'
sub CheckForWinDDK(strOptDDK)
   dim strPathDDK, str, strSubKeys
   PrintHdr "Windows DDK v7.1"

   '
   ' Find the DDK.
   '
   strPathDDK = CheckForWinDDKSub(strOptDDK, True)

   ' The tools location (first).
   if strPathDDK = "" and g_blnInternalFirst = true then
      for each str in g_arrPathDev
         strPathDDK = CheckForWinDDKSub(str & "/win.x86/ddk/7600.16385.1", False)
         if strPathDDK <> "" then exit for
      next
   end if

   ' Check the environment
   if strPathDDK = "" then strPathDDK = CheckForWinDDKSub(PathParent(PathParent(EnvGet("DDK_INC_PATH"))), True)
   if strPathDDK = "" then strPathDDK = CheckForWinDDKSub(EnvGet("BASEDIR"), True)

   ' Some array constants to ease the work.
   arrSoftwareKeys = array("SOFTWARE", "SOFTWARE\Wow6432Node")
   arrRoots        = array("HKLM", "HKCU")

   ' Windows 7 WDK.
   if strPathDDK = "" then
      arrLocations = array()
      for each strSoftwareKey in arrSoftwareKeys
         for each strSubKey in RegEnumSubKeysFull("HKLM", strSoftwareKey & "\Microsoft\KitSetup\configured-kits")
            for each strSubKey2 in RegEnumSubKeysFull("HKLM", strSubKey)
               str = LogRegGetString("HKLM\" & strSubKey2 & "\setup-install-location")
               if str <> "" then
                  arrLocations = ArrayAppend(arrLocations, PathAbsLong(str))
               end if
            next
         next
      next
      arrLocations = ArrayRVerSortStrings(arrLocations)

      ' Check the locations we've gathered.
      for each str in arrLocations
         strPathDDK = CheckForWinDDKSub(str, True)
         if strPathDDK <> "" then exit for
      next
   end if

   ' The tools location (post).
   if strPathDDK = "" and g_blnInternalFirst = false then
      for each str in g_arrPathDev
         strPathDDK = CheckForWinDDKSub(str & "/win.x86/ddk/7600.16385.1", False)
         if strPathDDK <> "" then exit for
      next
   end if

   ' Give up.
   if strPathDDK = "" then
      MsgError "Cannot find the Windows DDK v7.1. Check configure.log and the build requirements."
      exit sub
   end if

   '
   ' Emit the config.
   '
   strPathDDK = UnixSlashes(PathAbs(strPathDDK))
   CfgPrintAssign "PATH_SDK_WINDDK71", strPathDDK

   PrintResult "Windows DDK v7.1", strPathDDK
   g_strPathDDK = strPathDDK
end sub

'' Quick check if the DDK is in the specified directory or not.
function CheckForWinDDKSub(strPathDDK, blnCheckBuild)
   CheckForWinDDKSub = ""
   if strPathDDK <> "" then
      dim strOutput
      LogPrint "Trying: strPathDDK=" & strPathDDK & " blnCheckBuild=" & blnCheckBuild
      if   LogFileExists(strPathDDK, "inc/api/ntdef.h") _
       And LogFileExists(strPathDDK, "lib/win7/i386/int64.lib") _
       And LogFileExists(strPathDDK, "lib/wlh/i386/int64.lib") _
       And LogFileExists(strPathDDK, "lib/wnet/i386/int64.lib") _
       And LogFileExists(strPathDDK, "lib/wxp/i386/int64.lib") _
       And Not LogFileExists(strPathDDK, "lib/win8/i386/int64.lib") _
       And LogFileExists(strPathDDK, "bin/x86/rc.exe") _
         then
         if Not blnCheckBuild then
            CheckForWinDDKSub = strPathDDK
         '' @todo Find better build check.
         elseif Shell("""" & DosSlashes(strPathDDK & "/bin/x86/rc.exe") & """" , True, strOutput) <> 0 _
            and InStr(1, strOutput, "Resource Compiler Version 6.1.") > 0 _
         then
            CheckForWinDDKSub = strPathDDK
         end if
      end if
   end if
end function


''
' Locating midl.exe
'
sub CheckForMidl(strOptMidl)
   dim strMidl, str
   PrintHdr "Midl.exe"

   ' Skip if no COM/ATL.
   if g_blnDisableCOM then
      PrintResultMsg "Midl.exe", "Skipped (" & g_strDisableCOM & ")"
      exit sub
   end if

   strMidl = CheckForMidlSub(strOptMidl)
   if strMidl = "" then strMidl = CheckForMidlSub(g_strPathSDK10 & "/bin/" & g_strHostArchWin & "/Midl.exe")
   if strMidl = "" then strMidl = CheckForMidlSub(g_strPathSDK10 & "/bin/x86/Midl.exe")
   if strMidl = "" then strMidl = CheckForMidlSub(g_strPathPSDK  & "/bin/Midl.exe")
   if strMidl = "" then strMidl = CheckForMidlSub(g_strPathVCC   & "/Common7/Tools/Bin/Midl.exe")
   if strMidl = "" then strMidl = CheckForMidlSub(g_strPathDDK   & "/bin/" & g_strHostArchWin & "/Midl.exe")
   if strMidl = "" then strMidl = CheckForMidlSub(g_strPathDDK   & "/bin/x86/Midl.exe")
   if strMidl = "" then strMidl = CheckForMidlSub(g_strPathDDK   & "/bin/Midl.exe")
   if strMidl = "" then
      for each str in g_arrPathDev
         strMidl = CheckForMidlSub(str & "/win." & g_strHostArchWin & "/bin/Midl.exe")
         if strMidl <> "" then exit for
         strMidl = CheckForMidlSub(str & "/win.x86/bin/Midl.exe")
         if strMidl <> "" then exit for
      next
   end if

   if strMidl = "" then
      PrintResultMsg "Midl.exe", "not found"
   else
      CfgPrintAssign "VBOX_MAIN_IDL", strMidl
      PrintResult "Midl.exe", strMidl
   end if
end sub

function CheckForMidlSub(strMidl)
   CheckForMidlSub = ""
   if strMidl <> "" then
      if LogFileExists1(strMidl) then
         CheckForMidlSub = UnixSlashes(PathAbs(strMidl))
      end if
   end if
end function


''
' Locating yasm.exe
'
sub CheckForYasm(strOptYasm)
   dim strPathYasm, strVersion
   PrintHdr "yasm"

   strVersion = ""
   strPathYasm = CheckForYasmSub(strOptYasm, strVersion)
   if strPathYasm = "" then strPathYasm = CheckForYasmSub(PathStripFilename(strOptYasm), strVersion)
   if strPathYasm = "" and g_blnInternalFirst = true then
      strPathYasm = SearchHostTools("yasm", "v", GetRef("CheckForYasmSub"), strVersion)
   end if
   if strPathYasm = "" then strPathYasm = CheckForYasmSub(PathStripFilename(Which("yasm.exe")), strVersion)
   if strPathYasm = "" and g_blnInternalFirst = false then
      strPathYasm = SearchHostTools("yasm", "v", GetRef("CheckForYasmSub"), strVersion)
   end if

   if strPathYasm = "" then
      PrintResultMsg "yasm", "not found"
      MsgError "Unable to locate yasm!"
   else
      CfgPrintAssign "PATH_TOOL_YASM", strPathYasm
      PrintResult "yasm v" & strVersion, strPathYasm
   end if
end sub

function CheckForYasmSub(strPathYasm, ByRef strVersion)
   CheckForYasmSub = ""
   if strPathYasm <> "" then
      if LogFileExists(strPathYasm, "yasm.exe") then
         dim strOutput
         if Shell("""" & DosSlashes(strPathYasm & "\yasm.exe") & """ --version", True, strOutput) = 0 then
            dim strPreamble : strPreamble = "yasm"
            dim strVer      : strVer      = Trim(StrGetFirstLine(strOutput))
            if StrComp(Left(strVer, Len(strPreamble)), strPreamble, vbTextCompare) = 0 then
               strVersion = StrGetFirstWord(Trim(Mid(strVer, Len(strPreamble) + 1)))
               if StrVersionCompare(strVersion, "1.3.0") >= 0 and strVersion <> "" then
                  LogPrint "Found yasm version: " & strVer
                  CheckForYasmSub = UnixSlashes(PathAbs(strPathYasm))
               else
                  LogPrint "yasm version is older than 1.3.0: " & strVersion
               end if
            else
               LogPrint "Not yasm: " & strVer
            end if
         end if
      end if
   end if
end function


''
' Locating nasm.exe
'
sub CheckForNasm(strOptNasm)
   dim strPathNasm, strVersion
   PrintHdr "nasm"

   strPathNasm = CheckForNasmSub(strOptNasm, strVersion)
   if strPathNasm = "" then strPathNasm = CheckForNasmSub(PathStripFilename(strOptNasm), strVersion)
   if strPathNasm = "" and g_blnInternalFirst = true then
      strPathNasm = SearchHostTools("nasm", "v", GetRef("CheckForNasmSub"), strVersion)
   end if
   if strPathNasm = "" then strPathNasm = CheckForNasmSub(LogRegGetString("HKLM\SOFTWARE\nasm\"), strVersion)
   if strPathNasm = "" then strPathNasm = CheckForNasmSub(LogRegGetString("HKCU\SOFTWARE\nasm\"), strVersion)
   if strPathNasm = "" then
      for each strCandidate in CollectFromProgramItemLinks(GetRef("NasmProgramItemCallback"), strPathNasm)
         strPathNasm = CheckForNasmSub(strCandidate, strVersion)
      next
   end if
   if strPathNasm = "" then strPathNasm = CheckForNasmSub(PathStripFilename(Which("nasm.exe")), strVersion)
   if strPathNasm = "" and g_blnInternalFirst = false then
      strPathNasm = SearchHostTools("nasm", "v", GetRef("CheckForNasmSub"), strVersion)
   end if

   if strPathNasm = "" then
      PrintResultMsg "nasm", "not found"
   else
      CfgPrintAssign "PATH_TOOL_NASM", strPathNasm
      PrintResult "nasm v" & strVersion, strPathNasm
   end if
end sub

function NasmProgramItemCallback(ByRef arrStrings, cStrings, ByRef strUnused)
   dim str, off
   NasmProgramItemCallback = ""
   if cStrings > 1 then
      str = arrStrings(1)
      off = InStr(1, str, "\nasm.exe", vbTextCompare)
      if off > 0 then
         NasmProgramItemCallback = Left(str, off - 1)
      end if
   end if
end function

function CheckForNasmSub(strPathNasm, ByRef strVersion)
   CheckForNasmSub = ""
   if strPathNasm <> "" then
      if LogFileExists(strPathNasm, "nasm.exe") then
         dim strOutput
         if Shell("""" & DosSlashes(strPathNasm & "\nasm.exe") & """ -version", True, strOutput) = 0 then
            dim strPreamble : strPreamble = "NASM version"
            dim strVer      : strVer      = Trim(StrGetFirstLine(strOutput))
            if StrComp(Left(strVer, Len(strPreamble)), strPreamble, vbTextCompare) = 0 then
               strVersion = StrGetFirstWord(Trim(Mid(strVer, Len(strPreamble) + 1)))
               if StrVersionCompare(strVersion, "2.12.0") >= 0 and strVersion <> "" then
                  LogPrint "Found nasm version: " & strVersion
                  CheckForNasmSub = UnixSlashes(PathAbs(strPathNasm))
               else
                  LogPrint "nasm version is older than 2.12.0: " & strVersion
               end if
            else
               LogPrint "Not nasm: " & strVer
            end if
         end if
      end if
   end if
end function


''
' Locating OpenWatcom 1.9
'
sub CheckForOpenWatcom(strOptOpenWatcom)
   dim strPathOW, strCandidate, strVersion
   PrintHdr "OpenWatcom"

   strPathOW = CheckForOpenWatcomSub(strOptOpenWatcom, strVersion)
   if strPathOW = "" and g_blnInternalFirst = true then
      strPathOW = SearchCommonTools("openwatcom", "v", GetRef("CheckForOpenWatcomSub"), strVersion)
   end if
   if strPathOW = "" then
      for each strCandidate in CollectFromProgramItemLinks(GetRef("OpenWatcomProgramItemCallback"), strPathOW)
         if strPathOW = "" then strPathOW = CheckForOpenWatcomSub(strCandidate, strVersion)
      next
   end if
   if strPathOW = "" then strPathOW = CheckForOpenWatcomSub(EnvGet("WATCOM"), strVersion)
   if strPathOW = "" then strPathOW = CheckForOpenWatcomSub(PathParent(PathStripFilename(Which("wcc386.exe"))), strVersion)
   if strPathOW = "" and g_blnInternalFirst = false then
      strPathOW = SearchCommonTools("openwatcom", "v", GetRef("CheckForOpenWatcomSub"), strVersion)
   end if

   if strPathOW = "" then
      PrintResultMsg "OpenWatcom", "not found"
      CfgPrintAssign "VBOX_WITH_OPEN_WATCOM", ""
      exit sub
   end if

   CfgPrintAssign "VBOX_WITH_OPEN_WATCOM", "1"
   CfgPrintAssign "PATH_TOOL_OPENWATCOM", strPathOW
   PrintResult "OpenWatcom v" & strVersion, strPathOW
   if StrVersionCompare(strVersion, "2.0") >= 0 then
      MsgWarning "We only test building with OpenWatcom 1.9."
   end if
end sub

function OpenWatcomProgramItemCallback(ByRef arrStrings, cStrings, ByRef strUnused)
   dim str, off
   OpenWatcomProgramItemCallback = ""
   if cStrings > 1 then
      str = arrStrings(1)
      off = InStr(1, str, "\binnt\", vbTextCompare)
      if off > 0 then
         OpenWatcomProgramItemCallback = Left(str, off - 1)
      end if
   end if
end function

function CheckForOpenWatcomSub(strPathOW, ByRef strVersion)
   CheckForOpenWatcomSub = ""
   if strPathOW <> "" then
      LogPrint "Trying: " & strPathOW
      if LogDirExists(strPathOW) then
         if   LogDirExists(strPathOW & "/binnt") _
          and LogDirExists(strPathOW & "/h") _
          and LogDirExists(strPathOW & "/eddat") _
          and LogFileExists(strPathOW, "binnt/wcc386.exe") _
          and LogFileExists(strPathOW, "binnt/wcc.exe") _
          and LogFileExists(strPathOW, "binnt/wlink.exe") _
          and LogFileExists(strPathOW, "binnt/wcl386.exe") _
          and LogFileExists(strPathOW, "binnt/wcl.exe") _
          and LogFileExists(strPathOW, "binnt/wlib.exe") _
          and LogFileExists(strPathOW, "binnt/wasm.exe") _
          and LogFileExists(strPathOW, "h/stdarg.h") _
         then
            ' Some wcl/wcl386 option parsing quirk allows us to specify /whatever
            ' and just get the logo text and exit code 0.  We use /y as it's a valid option.
            dim strOutput
            if Shell("""" & DosSlashes(strPathOW & "\binnt\wcl.exe") & """ /y", True, strOutput) = 0 then
               dim strPreamble : strPreamble = "Open Watcom C/C++16 Compile and Link Utility Version"
               strOutput = StrGetFirstLine(strOutput)
               if StrStartsWithI(strOutput, strPreamble) then
                  strVersion = StrGetFirstWord(Trim(Mid(strOutput, Len(strPreamble) + 1)))
                  if StrVersionCompare(strVersion, "1.9") >= 0 then
                     CheckForOpenWatcomSub = UnixSlashes(PathAbs(strPathOW))
                  else
                     LogPrint "OpenWatcom version id older than 1.9: " & strVersion
                  end if
               else
                  LogPrint "Not OpenWatcom: " & strOutput
               end if
            end if
         end if
      end if
   end if
end function


''
' Checks for any libSDL binaries.
'
sub CheckForlibSDL(strOptlibSDL)
   dim strPathLibSDL, strVersion
   PrintHdr "libSDL"

   '
   ' Try find some SDL library.
   '
   strPathLibSDL = CheckForLibSDLSub(strOptlibSDL, strVersion)
   if strPathlibSDL = "" and g_blnInternalFirst = true then
      strPathLibSDL = SearchTargetTools("libsdl", "v", GetRef("CheckForLibSDLSub"), strVersion)
   end if

   ' Poke about in the LIB and PATH env.vars.
   if strPathlibSDL = "" then strPathLibSDL = CheckForlibSDLSub(PathParent(PathStripFilename(WhichEx("LIB", "SDLmain.lib"))), strVersion)
   if strPathlibSDL = "" then strPathLibSDL = CheckForlibSDLSub(PathParent(PathStripFilename(Which("..\lib\SDLmain.lib"))), strVersion)
   if strPathlibSDL = "" then strPathLibSDL = CheckForlibSDLSub(PathParent(PathStripFilename(Which("SDLmain.lib"))), strVersion)
   if strPathlibSDL = "" then strPathLibSDL = CheckForlibSDLSub(PathParent(PathStripFilename(Which("SDL.dll"))), strVersion)

   ' The tools again.
   if strPathlibSDL = "" and g_blnInternalFirst = false then
      strPathLibSDL = SearchTargetTools("libsdl", "v", GetRef("CheckForLibSDLSub"), strVersion)
   end if

   ' Success?
   if strPathlibSDL = "" then
      if strOptlibSDL = "" then
         MsgError "Can't locate libSDL. Try specify the path with the --with-libSDL=<path> argument. " _
                & "If still no luck, consult the configure.log and the build requirements."
      else
         MsgError "Can't locate libSDL. Please consult the configure.log and the build requirements."
      end if
      exit sub
   end if

   strPathLibSDL = UnixSlashes(PathAbs(strPathLibSDL))
   CfgPrintAssign "PATH_SDK_LIBSDL", strPathlibSDL

   PrintResult "libSDL", strPathlibSDL
end sub

'' Checks if the specified path points to an usable libSDL or not.
function CheckForLibSDLSub(strPathlibSDL, strVersion)
   CheckForlibSDLSub = ""
   if strPathLibSDL <> "" then
      LogPrint "Trying: strPathLibSDL=" & strPathLibSDL
      if   LogFileExists(strPathLibSDL, "lib/SDL.lib") _
       and LogFileExists(strPathLibSDL, "lib/SDLmain.lib") _
       and LogFileExists(strPathLibSDL, "lib/SDL.dll") _
      then
         dim strIncSub : strIncSub = "include"
         if DirExists(strPathlibSDL & "/include/SDL") then strIncSub = "include/SDL"
         if   LogFileExists(strPathLibSDL, strIncSub & "/SDL.h") _
          and LogFileExists(strPathLibSDL, strIncSub & "/SDL_syswm.h") _
          and LogFileExists(strPathLibSDL, strIncSub & "/SDL_version.h") _
         then
            strVersion = ""
            CheckForLibSDLSub = strPathLibSDL
         end if
      end if
   end if
end function


''
' Checks for libxml2.
'
sub CheckForXml2(strOptXml2)
   dim strPathXml2, str
   PrintHdr "libxml2"

   '
   ' Part of tarball / svn, so we can exit immediately if no path was specified.
   '
   if (strOptXml2 = "") then
      PrintResultMsg "libxml2", "src/lib/libxml2-*"
      exit sub
   end if

   ' Skip if no COM/ATL.
   if g_blnDisableCOM then
      PrintResultMsg "libxml2", "Skipped (" & g_strDisableCOM & ")"
      exit sub
   end if

   '
   ' Try find some xml2 dll/lib.
   '
   strPathXml2 = ""
   if (strPathXml2 = "") And (strOptXml2 <> "") then
      if CheckForXml2Sub(strOptXml2) then strPathXml2 = strOptXml2
   end if

   if strPathXml2 = "" then
      str = Which("libxml2.lib")
      if str <> "" then
         str = PathParent(PathStripFilename(str))
         if CheckForXml2Sub(str) then strPathXml2 = str
      end if
   end if

   ' Success?
   if strPathXml2 = "" then
      if strOptXml2 = "" then
         MsgError "Can't locate libxml2. Try specify the path with the --with-libxml2=<path> argument. " _
                & "If still no luck, consult the configure.log and the build requirements."
      else
         MsgError "Can't locate libxml2. Please consult the configure.log and the build requirements."
      end if
      exit sub
   end if

   strPathXml2 = UnixSlashes(PathAbs(strPathXml2))
   CfgPrintAssign "SDK_VBoxLibXml2_DEFS", "_REENTRANT"
   CfgPrintAssign "SDK_VBoxLibXml2_INCS", strPathXml2 & "/include"
   CfgPrintAssign "SDK_VBoxLibXml2_LIBS", strPathXml2 & "/lib/libxml2.lib"

   PrintResult "libxml2", strPathXml2
end sub

'' Checks if the specified path points to an usable libxml2 or not.
function CheckForXml2Sub(strPathXml2)
   dim str

   CheckForXml2Sub = False
   LogPrint "trying: strPathXml2=" & strPathXml2
   if   LogFileExists(strPathXml2, "include/libxml/xmlexports.h") _
    And LogFileExists(strPathXml2, "include/libxml/xmlreader.h") _
      then
      str = LogFindFile(strPathXml2, "bin/libxml2.dll")
      if str <> "" then
         if LogFindFile(strPathXml2, "lib/libxml2.lib") <> "" then
            CheckForXml2Sub = True
         end if
      end if
   end if
end function


'' Checks for openssl
sub CheckForSsl(strOptSsl, bln32Bit)
   dim strPathSsl, str
   PrintHdr "openssl"

   strOpenssl = "openssl"
   if bln32Bit = True then
       strOpenssl = "openssl32"
   end if

   '
   ' Part of tarball / svn, so we can exit immediately if no path was specified.
   '
   if (strOptSsl = "") then
      PrintResult strOpenssl, "src/libs/openssl-*"
      exit sub
   end if

   '
   ' Try find some openssl dll/lib.
   '
   strPathSsl = ""
   if (strPathSsl = "") And (strOptSsl <> "") then
      if CheckForSslSub(strOptSsl) then strPathSsl = strOptSsl
   end if

   if strPathSsl = "" then
      str = Which("libssl.lib")
      if str <> "" then
         str = PathParent(PathStripFilename(str))
         if CheckForSslSub(str) then strPathSsl = str
      end if
   end if

   ' Success?
   if strPathSsl = "" then
      if strOptSsl = "" then
         MsgError "Can't locate " & strOpenssl & ". " _
                & "Try specify the path with the --with-" & strOpenssl & "=<path> argument. " _
                & "If still no luck, consult the configure.log and the build requirements."
      else
         MsgError "Can't locate " & strOpenssl & ". " _
                & "Please consult the configure.log and the build requirements."
      end if
      exit sub
   end if

   strPathSsl = UnixSlashes(PathAbs(strPathSsl))
   if bln32Bit = True then
      CfgPrintAssign "SDK_VBoxOpenSslStatic-x86_INCS",     strPathSsl & "/include"
      CfgPrintAssign "SDK_VBoxOpenSslStatic-x86_LIBS",     strPathSsl & "/lib/libcrypto.lib" & " " & strPathSsl & "/lib/libssl.lib"
      CfgPrintAssign "SDK_VBoxOpenSslBldProg-x86_LIBS", strPathSsl & "/lib/libcrypto.lib" & " " & strPathSsl & "/lib/libssl.lib"
   else
      CfgPrintAssign "SDK_VBoxOpenSslStatic_INCS",         strPathSsl & "/include"
      CfgPrintAssign "SDK_VBoxOpenSslStatic_LIBS",         strPathSsl & "/lib/libcrypto.lib" & " " & strPathSsl & "/lib/libssl.lib"
      CfgPrintAssign "SDK_VBoxOpenSslBldProg_LIBS",     strPathSsl & "/lib/libcrypto.lib" & " " & strPathSsl & "/lib/libssl.lib"
   end if

   PrintResult strOpenssl, strPathSsl
end sub

'' Checks if the specified path points to an usable openssl or not.
function CheckForSslSub(strPathSsl)

   CheckForSslSub = False
   LogPrint "trying: strPathSsl=" & strPathSsl
   if   LogFileExists(strPathSsl, "include/openssl/md5.h") _
    And LogFindFile(strPathSsl, "lib/libssl.lib") <> "" _
      then
         CheckForSslSub = True
      end if
end function


''
' Checks for libcurl
'
sub CheckForCurl(strOptCurl, bln32Bit)
   dim strPathCurl, str
   PrintHdr "libcurl"

   strCurl = "libcurl"
   if bln32Bit = True then
       strCurl = "libcurl32"
   end if

   '
   ' Part of tarball / svn, so we can exit immediately if no path was specified.
   '
   if (strOptCurl = "") then
      PrintResult strCurl, "src/libs/curl-*"
      exit sub
   end if

   '
   ' Try find some cURL dll/lib.
   '
   strPathCurl = ""
   if (strPathCurl = "") And (strOptCurl <> "") then
      if CheckForCurlSub(strOptCurl) then strPathCurl = strOptCurl
   end if

   if strPathCurl = "" then
      str = Which("libcurl.lib")
      if str <> "" then
         str = PathParent(PathStripFilename(str))
         if CheckForCurlSub(str) then strPathCurl = str
      end if
   end if

   ' Success?
   if strPathCurl = "" then
      if strOptCurl = "" then
         MsgError "Can't locate " & strCurl & ". " _
                & "Try specify the path with the --with-" & strCurl & "=<path> argument. " _
                & "If still no luck, consult the configure.log and the build requirements."
      else
         MsgError "Can't locate " & strCurl & ". " _
                & "Please consult the configure.log and the build requirements."
      end if
      exit sub
   end if

   strPathCurl = UnixSlashes(PathAbs(strPathCurl))
   if bln32Bit = True then
      CfgPrintAssign "SDK_VBoxLibCurl-x86_INCS",     strPathCurl & "/include"
      CfgPrintAssign "SDK_VBoxLibCurl-x86_LIBS.x86", strPathCurl & "/libcurl.lib"
   else
      CfgPrintAssign "SDK_VBoxLibCurl_INCS", strPathCurl & "/include"
      CfgPrintAssign "SDK_VBoxLibCurl_LIBS", strPathCurl & "/libcurl.lib"
   end if

   PrintResult strCurl, strPathCurl
end sub

'' Checks if the specified path points to an usable libcurl or not.
function CheckForCurlSub(strPathCurl)

   CheckForCurlSub = False
   LogPrint "trying: strPathCurl=" & strPathCurl
   if   LogFileExists(strPathCurl, "include/curl/curl.h") _
    And LogFindFile(strPathCurl, "libcurl.dll") <> "" _
    And LogFindFile(strPathCurl, "libcurl.lib") <> "" _
      then
         CheckForCurlSub = True
      end if
end function


''
' Checks for any Qt5 binaries.
'
sub CheckForQt(strOptQt5, strOptInfix)
   dim strPathQt5, strInfixQt5, arrFolders, arrVccInfixes, strVccInfix, strPathDev
   PrintHdr "Qt5"

   '
   ' Try to find the Qt5 installation (user specified path with --with-qt5)
   '
   LogPrint "Checking for user specified path of Qt5 ... "
   strPathQt5 = CheckForQt5Sub(UnixSlashes(strOptQt5), strOptInfix, strInfixQt5)
   if strPathQt5 = "" and g_blnInternalFirst = true then strPathQt5 = CheckForQt5Internal(strOptInfix, strInfixQt5)
   if strPathQt5 = "" then
      '
      ' Collect links from "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\UFH\SHC"
      '
      ' Typical string list:
      '   C:\Users\someuser\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Qt\5.x.y\MSVC 20zz (64-bit)\Qt 5.x.y (MSVC 20zz 64-bit).lnk
      '   C:\Windows\System32\cmd.exe
      '   /A /Q /K E:\qt\installed\5.x.y\msvc20zz_64\bin\qtenv2.bat
      '
      dim arrCandidates, strCandidate
      arrCandidates = CollectFromProgramItemLinks(GetRef("Qt5ProgramItemCallback"), strPathQt5)
      LogPrint "Testing qtenv2.bat links (" & ArraySize(arrCandidates) & ") ..."

      ' VC infixes/subdir names to consider (ASSUMES 64bit)
      if     g_strVCCVersion = "VCC142" or g_strVCCVersion = "" then
         arrVccInfixes = Array("msvc2019_64", "msvc2017_64", "msvc2015_64")
      elseif g_strVCCVersion = "VCC141" then
         arrVccInfixes = Array("msvc2017_64", "msvc2015_64", "msvc2019_64")
      elseif g_strVCCVersion = "VCC140" then
         arrVccInfixes = Array("msvc2015_64", "msvc2017_64", "msvc2019_64")
      elseif g_strVCCVersion = "VCC120" then
         arrVccInfixes = Array("msvc2013_64")
      elseif g_strVCCVersion = "VCC110" then
         arrVccInfixes = Array("msvc2012_64")
      elseif g_strVCCVersion = "VCC100" then
         arrVccInfixes = Array("msvc2010_64")
      else
         MsgFatal "Unexpected VC version: " & g_strVCCVersion
         arrVccInfixes = Array()
      end if
      for each strVccInfix in arrVccInfixes
         for each strCandidate in arrCandidates
            if InStr(1, LCase(strCandidate), strVccInfix) > 0 then
               strPathQt5 = CheckForQt5Sub(strCandidate, strOptInfix, strInfixQt5)
               if strPathQt5 <> "" then exit for
            end if
         next
         if strPathQt5 <> "" then exit for
      next
   end if

   ' Check the dev tools - prefer ones matching the compiler.
   if strPathQt5 = "" and g_blnInternalFirst = false then strPathQt5 = CheckForQt5Internal(strOptInfix, strInfixQt5)

   '
   ' Display the result and output the config.
   '
   if strPathQt5 <> "" then
      PrintResult "Qt5", strPathQt5
      PrintResultMsg "Qt5 infix", strInfixQt5
      CfgPrintAssign "PATH_SDK_QT5",          strPathQt5
      CfgPrintAssign "PATH_TOOL_QT5",         "$(PATH_SDK_QT5)"
      CfgPrintAssign "VBOX_PATH_QT",          "$(PATH_SDK_QT5)"
      CfgPrintAssign "VBOX_QT_INFIX",         strInfixQt5
      CfgPrintAssign "VBOX_WITH_QT_PAYLOAD",  "1"
   else
      PrintResultMsg "Qt5", "not found"
      CfgPrintAssign "VBOX_WITH_QTGUI", ""
   end if
end sub

function CheckForQt5Internal(strOptInfix, ByRef strInfixQt5)
   dim strPathDev, arrFolders, arrVccInfixes, strVccInfix, i
   CheckForQt5Internal = ""
   for each strPathDev in g_arrPathDev
      LogPrint "Testing tools dir (" & strPathDev & "/win." & g_strTargetArch & "/qt/v5*) ..."
      arrFolders = GetSubdirsStartingWithVerSorted(strPathDev & "/win." & g_strTargetArch & "/qt", "v5")
      arrVccInfixes = Array(LCase(g_strVCCVersion), Left(LCase(g_strVCCVersion), Len(g_strVCCVersion) - 1), "")
      for each strVccInfix in arrVccInfixes
         for i = UBound(arrFolders) to LBound(arrFolders) step -1
            if strVccInfix = "" or InStr(1, LCase(arrFolders(i)), strVccInfix) > 0 then
LogPrint "i="&i&" strVccInfix="&strVccInfix
               strPathQt5 = CheckForQt5Sub(strPathDev & "/win." & g_strTargetArch & "/qt/" & arrFolders(i), strOptInfix, strInfixQt5)
               if strPathQt5 <> "" then
                  CheckForQt5Internal = strPathQt5
                  exit function
               end if
            end if
         next
      next
   next
end function

function Qt5ProgramItemCallback(ByRef arrStrings, cStrings, ByRef strUnused)
   dim str, off
   Qt5ProgramItemCallback = ""
   if cStrings >= 3 then
      str = Trim(arrStrings(UBound(arrStrings)))
      if   LCase(Right(str, Len("\bin\qtenv2.bat"))) = "\bin\qtenv2.bat" _
       and InStr(1, LCase(str), "\msvc20") > 0 _
       and InStr(1, str, ":") > 0 _
      then
         off = InStr(1, str, ":") - 1
         Qt5ProgramItemCallback = Mid(str, off, Len(str) - off - Len("\bin\qtenv2.bat") + 1)
      end if
   end if
end function

function CheckForQt5Sub(strPathQt5, strOptInfix, ByRef strInfixQt5)
   CheckForQt5Sub = ""
   if strPathQt5 <> "" then
      LogPrint "Trying: strPathQt5=" & strPathQt5

      if   LogFileExists(strPathQt5, "bin/moc.exe") _
       and LogFileExists(strPathQt5, "bin/uic.exe") _
       and LogFileExists(strPathQt5, "include/QtWidgets/qwidget.h") _
       and LogFileExists(strPathQt5, "include/QtWidgets/QApplication") _
       and LogFileExists(strPathQt5, "include/QtGui/QImage") _
       and LogFileExists(strPathQt5, "include/QtNetwork/QHostAddress") _
      then
         ' Infix testing.
         if   LogFileExists(strPathQt5, "lib/Qt5Core.lib") _
          and LogFileExists(strPathQt5, "lib/Qt5Network.lib") then
            LogPrint "found it w/o infix"
            strInfixQt5 = ""
            CheckForQt5Sub = UnixSlashes(PathAbs(strPathQt5))
         elseif LogFileExists(strPathQt5, "lib/Qt5Core" & strOptInfix & ".lib") _
            and LogFileExists(strPathQt5, "lib/Qt5Network" & strOptInfix & ".lib") then
            LogPrint "found it w/ infix: " & strOptInfix & " (option)"
            strInfixQt5 = strOptInfix
            CheckForQt5Sub = UnixSlashes(PathAbs(strPathQt5))
         elseif LogFileExists(strPathQt5, "lib/Qt5CoreVBox.lib") _
            and LogFileExists(strPathQt5, "lib/Qt5NetworkVBox.lib") then
            LogPrint "found it w/ infix: VBox"
            strInfixQt5 = "VBox"
            CheckForQt5Sub = UnixSlashes(PathAbs(strPathQt5))
         end if
      end if
   end if
end function


''
' Checks for python.
'
function CheckForPython(strOptPython)
   dim strPathPython, arrVersions, strVer, str
   PrintHdr "Python"
   CheckForPython = False

   '
   ' Locate it.
   '
   strPathPython = CheckForPythonSub(strOptPython)
   if strPathPython = "" then
      arrVersions = Array("3.12", "3.11", "3.10", "3.9", "3.8", "3.7", "3.6", "3.5", "2.7")
      for each strVer in arrVersions
         strPathPython = CheckForPythonSub(LogRegGetString("HKLM\SOFTWARE\Python\PythonCore\" & strVer & "\InstallPath\"))
         if strPathPython <> "" then exit for
      next
   end if
   if strPathPython = "" then strPathPython = CheckForPythonSub(PathStripFilename(Which("python.exe")))

   '
   ' Output config & result.
   '
   CheckForPython = strPathPython <> ""
   if CheckForPython then
      CfgPrintAssign "VBOX_BLD_PYTHON", strPathPython
      PrintResult "Python", strPathPython
   else
      PrintResultMsg "Python", "not found"
   end if
end function

function CheckForPythonSub(strPathPython)
   CheckForPythonSub = ""
   if strPathPython <> "" then
      if   LogFileExists(strPathPython, "python.exe") _
      then
         CheckForPythonSub = UnixSlashes(PathAbs(strPathPython & "/python.exe"))
      end if
   end if
end function


''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'  Main function and usage                                                                                                       '
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

''
' Show usage.
'
sub usage
   Print "Usage: cscript configure.vbs [options]"
   Print ""
   Print "Configuration:"
   Print "  -h, --help              Display this."
   Print "  --target-arch=x86|amd64 The target architecture."
   Print "  --continue-on-error     Do not stop on errors."
   Print "  --internal-last         Check internal tools (tools/win.*) last."
   Print "  --internal-first        Check internal tools (tools/win.*) first (default)."
   Print ""
   Print "Components:"
   Print "  --disable-COM           Disables all frontends and API."
   Print "  --disable-SDL           Disables the SDL frontend."
   Print "  --disable-UDPTunnel"
   Print "  --disable-pylint        Disable use of pylint."
   Print ""
   Print "Locations:"
   Print "  --with-kBuild=PATH      Where kBuild is to be found."
   Print "  --with-libSDL=PATH      Where libSDL is to be found."
   Print "  --with-Qt5=PATH         Where Qt5 is to be found (optional)."
   Print "  --with-DDK=PATH         Where the WDK is to be found."
   Print "  --with-SDK=PATH         Where the Windows SDK is to be found."
   Print "  --with-SDK10=PATH       Where the Windows 10 SDK/WDK is to be found."
   Print "  --with-VC=PATH          Where the Visual C++ compiler is to be found."
   Print "                          (Expecting bin, include and lib subdirs.)"
   Print "  --with-VC-Common=PATH   Maybe needed for 2015 and older to"
   Print "                          locate the Common7 directory."
   Print "  --with-python=PATH      The python to use."
   Print "  --with-midl=PATH        Where midl.exe is to be found."
   Print "  --with-yasm=PATH        Where YASM is to be found."
   Print "  --with-nasm=PATH        Where NASM is to be found (optional)"
   Print "  --with-openwatcom=PATH  Where OpenWatcom 1.9 is to be found (optional)."
   Print "  --with-libxml2=PATH     To use a libxml2 other than the VBox one (opt)."
   Print "  --with-openssl=PATH     To use an openssl other than the VBox one (opt)."
   Print "  --with-openssl32=PATH   The 32-bit variant of openssl (optional)."
   Print "  --with-libcurl=PATH     To use a cURL other than the VBox one (optional)."
   Print "  --with-libcurl32=PATH   The 32-bit variant of cURL (optional)."
   Print ""
   Print "  --append-tools-dir=PATH, --prepend-tools-dir=PATH"
   Print "                          Adds an alternative tools directory to search."
   Print "  --append-tools-dir=PATH, --prepend-prog-files=PATH"
   Print "                          Adds an alternative Program Files dir to search."
   Print "  --append-ewdk-drive=DRIVE, --prepend-ewdk-drive=DRIVE"
   Print "                          Adds an EWDK drive the search list."
end sub


''
' The main() like function.
'
function Main
   dim strOutput

   '
   ' Write the log header and check that we're not using wscript.
   '
   LogInit
   if UCase(Right(Wscript.FullName, 11)) = "WSCRIPT.EXE" then
      Wscript.Echo "This script must be run under CScript."
      Main = 1
      exit function
   end if
   SelfTest

   '
   ' Parse arguments.
   '
   strOptDDK = ""
   strOptkBuild = ""
   strOptlibSDL = ""
   strOptQt5 = ""
   strOptQt5Infix = ""
   strOptSDK10 = ""
   strOptSDK10Version = ""
   strOptVC = ""
   strOptVCCommon = ""
   strOptMidl = ""
   strOptYasm = ""
   strOptNasm = ""
   strOptOpenWatcom = ""
   strOptXml2 = ""
   strOptSsl = ""
   strOptSsl32 = ""
   strOptCurl = ""
   strOptCurl32 = ""
   strOptPython = ""
   blnOptDisableCOM = False
   blnOptDisableUDPTunnel = False
   blnOptDisableSDL = False
   for i = 1 to Wscript.Arguments.Count
      dim str, strArg, strPath

      ' Separate argument and path value
      str = Wscript.Arguments.item(i - 1)
      if InStr(1, str, "=") > 0 then
         strArg = Mid(str, 1, InStr(1, str, "=") - 1)
         strPath = Mid(str, InStr(1, str, "=") + 1)
         if strPath = "" then MsgFatal "Syntax error! Argument #" & i & " is missing the path."
      else
         strArg = str
         strPath = ""
      end if

      ' Process the argument
      select case LCase(strArg)
         ' --with-something:
         case "--with-ddk"
            strOptDDK = strPath
         case "--with-dxsdk"
            MsgWarning "Ignoring --with-dxsdk (the DirectX SDK is no longer required)."
         case "--with-kbuild"
            strOptkBuild = strPath
         case "--with-libsdl"
            strOptlibSDL = strPath
         case "--with-mingw32"
            ' ignore
         case "--with-mingw-w64"
            ' ignore
         case "--with-qt5"
            strOptQt5 = strPath
         case "--with-qt5-infix"
            strOptQt5Infix = strPath
         case "--with-sdk"
            MsgWarning "Ignoring --with-sdk (the legacy Platform SDK is no longer required)."
         case "--with-sdk10"
            strOptSDK10 = strPath
         case "--with-sdk10-version"
            strOptSDK10Version = strPath
         case "--with-vc"
            strOptVC = strPath
         case "--with-vc-common"
            strOptVCCommon = strPath
         case "--with-vc-express-edition"
            ' ignore
         case "--with-w32api"
            ' ignore
         case "--with-midl"
            strOptMidl = strPath
         case "--with-yasm"
            strOptYasm = strPath
         case "--with-nasm"
            strOptNasm = strPath
         case "--with-openwatcom"
            strOptOpenWatcom = strPath
         case "--with-libxml2"
            strOptXml2 = strPath
         case "--with-openssl"
            strOptSsl = strPath
         case "--with-openssl32"
            strOptSsl32 = strPath
         case "--with-libcurl"
            strOptCurl = strPath
         case "--with-libcurl32"
            strOptCurl32 = strPath
         case "--with-python"
            strOptPython = strPath

         ' Search lists.
         case "--append-tools-dir"
            g_arrToolsDirs    = ArrayAppend(g_arrPathDev, strPath)
         case "--prepend-tools-dir"
            g_arrToolsDirs    = ArrayPrepend(g_arrPathDev, strPath)
         case "--append-prog-files"
            g_arrProgramFiles = ArrayAppend(g_arrProgramFiles, strPath)
         case "--prepend-prog-files"
            g_arrProgramFiles = ArrayPrepend(g_arrProgramFiles, strPath)
         case "--append-ewdk-drive"
            g_arrProgramFiles = ArrayAppend(g_arrProgramFiles, strPath & "\Program Files")
         case "--prepend-ewdk-drive"
            g_arrProgramFiles = ArrayPrepend(g_arrProgramFiles, strPath & "\Program Files")

         ' --disable-something/--enable-something
         case "--disable-com"
            blnOptDisableCOM = True
         case "--enable-com"
            blnOptDisableCOM = False
         case "--disable-udptunnel"
            blnOptDisableUDPTunnel = True
         case "--enable-udptunnel"
            blnOptDisableUDPTunnel = False
         case "--disable-sdl"
            blnOptDisableSDL = True
         case "--endable-sdl"
            blnOptDisableSDL = False
         case "--disable-pylint"
            blnOptDisablePylint = True
         case "--enable-pylint"
            blnOptDisablePylint = False

         ' Other stuff.
         case "--continue-on-error"
            g_blnContinueOnError = True
         case "--internal-first"
            g_blnInternalFirst = True
         case "--internal-last"
            g_blnInternalFirst = False
         case "--target-arch"
            g_strTargetArch = strPath
         case "-h", "--help", "-?"
            usage
            Main = 0
            exit function
         case else
            Wscript.echo "syntax error: Unknown option '" & str &"'."
            usage
            Main = 2
            exit function
      end select
   next

   '
   ' Initialize output files.
   '
   CfgInit
   EnvInit

   '
   ' Check that the Shell function is sane.
   '
   g_objShell.Environment("PROCESS")("TESTING_ENVIRONMENT_INHERITANCE") = "This works"
   if Shell("set TESTING_ENVIRONMENT_INHERITANC", False, strOutput) <> 0 then ' The 'E' is missing on purpose (4nt).
      MsgFatal "shell execution test failed!"
   end if
   if strOutput <> "TESTING_ENVIRONMENT_INHERITANCE=This works" & CHR(13) & CHR(10)  then
      Print "Shell test Test -> '" & strOutput & "'"
      MsgFatal "shell inheritance or shell execution isn't working right. Make sure you use cmd.exe."
   end if
   g_objShell.Environment("PROCESS")("TESTING_ENVIRONMENT_INHERITANCE") = ""
   Print "Shell inheritance test: OK"

   '
   ' Do the checks.
   '
   if blnOptDisableCOM = True then
      DisableCOM        "--disable-com"
   end if
   if blnOptDisableUDPTunnel = True then
      DisableUDPTunnel  "--disable-udptunnel"
   end if
   if blnOptDisablePylint = True then
      CfgPrintAssign "override VBOX_WITH_PYLINT", ""
   end if
   CheckSourcePath
   CheckForkBuild       strOptkBuild
   CheckForWinDDK       strOptDDK
   CheckForVisualCPP    strOptVC, strOptVCCommon
   CheckForSDK10        strOptSDK10, strOptSDK10Version
   CheckForMidl         strOptMidl
   CheckForYasm         strOptYasm
   CheckForNasm         strOptNasm
   CheckForOpenWatcom   strOptOpenWatcom
   if blnOptDisableSDL = True then
      DisableSDL "--disable-sdl"
   else
      CheckForlibSDL    strOptlibSDL
   end if
   CheckForXml2         strOptXml2
   CheckForSsl          strOptSsl, False
   if g_strTargetArch = "amd64" then
       ' 32-bit openssl required as well
      CheckForSsl       strOptSsl32, True
   end if
   CheckForCurl         strOptCurl, False
   if g_strTargetArch = "amd64" then
       ' 32-bit Curl required as well
      CheckForCurl      strOptCurl32, True
   end if
   CheckForQt           strOptQt5, strOptQt5Infix
   CheckForPython       strOptPython
   CfgPrintAssign "VBOX_WITH_LIBVPX",    "" '' @todo look for libvpx 1.1.0+
   CfgPrintAssign "VBOX_WITH_LIBOGG",    "" '' @todo look for libogg 1.3.5+
   CfgPrintAssign "VBOX_WITH_LIBVORBIS", "" '' @todo look for libvorbis 1.3.7+

   EnvPrintAppend "PATH", DosSlashes(g_strPath & "\tools\win." & g_strHostArch & "\bin"), ";"
   if g_strHostArch = "amd64" then
      EnvPrintAppend "PATH", DosSlashes(g_strPath & "\tools\win.x86\bin"), ";"
   else
      EnvPrintCleanup "PATH", DosSlashes(g_strPath & "\tools\win.amd64\bin"), ";"
   end if

   Print ""
   Print "Execute env.bat once before you start to build VBox:"
   Print ""
   Print "  env.bat"
   Print "  kmk"
   Print ""
   if g_rcScript <> 0 then
      Print "Warning: ignored errors. See above or in configure.log."
   end if

   Main = g_rcScript
end function

'
' What crt0.o typically does:
'
WScript.Quit(Main())