summaryrefslogtreecommitdiffstats
path: root/ConfigureChecks.cmake
blob: f0ba085d42db57949bf3700a9e0ec160ed64bd58 (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
# ConfigureChecks.cmake
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later
#

include(CMakePushCheckState)

#check system for includes
include(CheckIncludeFile)
include(CheckIncludeFiles)
check_include_file("arpa/inet.h"            HAVE_ARPA_INET_H)
check_include_file("grp.h"                  HAVE_GRP_H)
#
# This may require <sys/types.h> to be included
#
check_include_files("sys/types.h;ifaddrs.h" HAVE_IFADDRS_H)
check_include_file("netinet/in.h"           HAVE_NETINET_IN_H)
check_include_file("netdb.h"                HAVE_NETDB_H)
check_include_file("pwd.h"                  HAVE_PWD_H)
check_include_file("sys/select.h"           HAVE_SYS_SELECT_H)
check_include_file("sys/socket.h"           HAVE_SYS_SOCKET_H)
check_include_file("sys/time.h"             HAVE_SYS_TIME_H)
check_include_file("sys/utsname.h"          HAVE_SYS_UTSNAME_H)
check_include_file("sys/wait.h"             HAVE_SYS_WAIT_H)
check_include_file("unistd.h"               HAVE_UNISTD_H)

#
# On Linux, check for some additional headers, which we need as a
# workaround for a bonding driver bug and for libpcap's current lack
# of its own workaround for that bug.
#
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
	#
	# Those header files require <sys/socket.h>.
	#
	check_c_source_compiles(
		"#include <sys/socket.h>
		#include <linux/sockios.h>
		int main(void)
		{
			return 0;
		}"
		HAVE_LINUX_SOCKIOS_H
	)
	check_c_source_compiles(
		"#include <sys/socket.h>
		#include <linux/if_bonding.h>
		int main(void)
		{
			return 0;
		}"
		HAVE_LINUX_IF_BONDING_H
	)
endif()

#Functions
include(CheckFunctionExists)
include(CheckSymbolExists)

#
# Platform-specific functions used in platform-specific code.
# We check for them only on the platform on which we use them.
#
if(CMAKE_SYSTEM_NAME STREQUAL "HP-UX")
	#
	# HP-UX
	#
	cmake_push_check_state()
	set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_DL_LIBS})
	check_function_exists("dlget"           HAVE_DLGET)
	cmake_pop_check_state()
elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
	#
	# Solaris
	#
	check_function_exists("getexecname"     HAVE_GETEXECNAME)
endif()

check_symbol_exists("clock_gettime"  "time.h"   HAVE_CLOCK_GETTIME)
# Some platforms (macOS pre 10.15) are non-conformant with C11 and lack timespec_get()
check_symbol_exists("timespec_get"   "time.h"   HAVE_TIMESPEC_GET)
if(NOT MSVC)
	check_symbol_exists("localtime_r"    "time.h"   HAVE_LOCALTIME_R)
	check_symbol_exists("gmtime_r"       "time.h"   HAVE_GMTIME_R)
	check_symbol_exists("timegm"         "time.h"   HAVE_TIMEGM)
	check_symbol_exists("tzset"          "time.h"   HAVE_TZSET)
	check_symbol_exists("tzname"         "time.h"   HAVE_TZNAME)
endif()
check_function_exists("getifaddrs"       HAVE_GETIFADDRS)
check_function_exists("issetugid"        HAVE_ISSETUGID)
check_function_exists("setresgid"        HAVE_SETRESGID)
check_function_exists("setresuid"        HAVE_SETRESUID)
if (APPLE)
	cmake_push_check_state()
	set(CMAKE_REQUIRED_LIBRARIES ${APPLE_CORE_FOUNDATION_LIBRARY})
	check_function_exists("CFPropertyListCreateWithStream" HAVE_CFPROPERTYLISTCREATEWITHSTREAM)
	cmake_pop_check_state()
endif()
if(UNIX)
	cmake_push_check_state()
	list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
	check_symbol_exists("memmem"        "string.h"   HAVE_MEMMEM)
	check_symbol_exists("strerrorname_np" "string.h" HAVE_STRERRORNAME_NP)
	check_symbol_exists("strptime"      "time.h"     HAVE_STRPTIME)
	check_symbol_exists("vasprintf"     "stdio.h"    HAVE_VASPRINTF)
	cmake_pop_check_state()
endif()

#Struct members
include(CheckStructHasMember)
check_struct_has_member("struct stat"     st_blksize     sys/stat.h   HAVE_STRUCT_STAT_ST_BLKSIZE)
check_struct_has_member("struct stat"     st_birthtime   sys/stat.h   HAVE_STRUCT_STAT_ST_BIRTHTIME)
check_struct_has_member("struct stat"     __st_birthtime sys/stat.h   HAVE_STRUCT_STAT___ST_BIRTHTIME)
check_struct_has_member("struct tm"       tm_zone        time.h       HAVE_STRUCT_TM_TM_ZONE)
check_struct_has_member("struct tm"       tm_gmtoff      time.h       HAVE_STRUCT_TM_TM_GMTOFF)

# Types
include(CheckTypeSize)
check_type_size("ssize_t"       SSIZE_T)

#
# Check if the libc vsnprintf() conforms to C99. If this fails we may
# need to fall-back on GLib I/O.
#
# If cross-compiling we can't check so just assume this requirement is met.
#
if(NOT CMAKE_CROSSCOMPILING)
	check_c_source_runs("
		#include <stdio.h>
		int main(void)
		{
			/* Check that snprintf() and vsnprintf() don't return
			* -1 if the buffer is too small. C99 says this value
			* is the length that would be written not including
			* the nul byte. */
			char buf[3];
			return snprintf(buf, sizeof(buf), \"%s\", \"ABCDEF\") > 0 ? 0 : 1;
		}"
		HAVE_C99_VSNPRINTF
	)
	if (NOT HAVE_C99_VSNPRINTF)
		message(FATAL_ERROR
"Building Wireshark requires a C99 compliant vsnprintf() and this \
target does not meet that requirement. Compiling for ${CMAKE_SYSTEM} \
using ${CMAKE_C_COMPILER_ID}. Please report this issue to the Wireshark \
developers at wireshark-dev@wireshark.org."
		)
	endif()
endif()

#
# *If* we found libnl, check if we can use nl80211 stuff with it.
#
if (NL_FOUND)
	check_c_source_compiles(
		"#include <linux/nl80211.h>
		int main(void) {
			int x = NL80211_FREQUENCY_ATTR_MAX_TX_POWER;
			x |= NL80211_ATTR_SUPPORTED_IFTYPES;
			x |= NL80211_ATTR_SUPPORTED_COMMANDS;
			x |= NL80211_ATTR_WIPHY_FREQ;
			x |= NL80211_CHAN_NO_HT;
			(void)x;
		}"
		HAVE_NL80211
	)
	check_c_source_compiles(
		"#include <linux/nl80211.h>
		int main(void) {
			enum nl80211_commands x = NL80211_CMD_SET_CHANNEL;
		}"
		HAVE_NL80211_CMD_SET_CHANNEL
	)
	check_c_source_compiles(
		"#include <linux/nl80211.h>
		int main(void) {
			enum nl80211_protocol_features x = NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP;
		}"
		HAVE_NL80211_SPLIT_WIPHY_DUMP
	)
	check_c_source_compiles(
		"#include <linux/nl80211.h>
		int main(void) {
			enum nl80211_attrs x = NL80211_ATTR_VHT_CAPABILITY;
		}"
		HAVE_NL80211_VHT_CAPABILITY
	)
endif()

#
# Editor modelines  -  https://www.wireshark.org/tools/modelines.html
#
# Local variables:
# c-basic-offset: 8
# tab-width: 8
# indent-tabs-mode: t
# End:
#
# vi: set shiftwidth=8 tabstop=8 noexpandtab:
# :indentSize=8:tabSize=8:noTabs=false:
#