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
|
# libunistring.m4 serial 12
dnl Copyright (C) 2009-2020 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_PREREQ([2.64])
dnl gl_LIBUNISTRING
dnl Searches for an installed libunistring.
dnl If found, it sets and AC_SUBSTs HAVE_LIBUNISTRING=yes and the LIBUNISTRING
dnl and LTLIBUNISTRING variables, sets the LIBUNISTRING_VERSION variable, and
dnl augments the CPPFLAGS variable, and #defines HAVE_LIBUNISTRING to 1.
dnl Otherwise, it sets and AC_SUBSTs HAVE_LIBUNISTRING=no and LIBUNISTRING and
dnl LTLIBUNISTRING to empty.
dnl Define gl_LIBUNISTRING using AC_DEFUN_ONCE, in order dnl to avoid warnings
dnl like
dnl "warning: AC_REQUIRE: `gl_LIBUNISTRING' was expanded before it was required".
dnl This is tricky because of the way 'aclocal' is implemented:
dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
dnl Otherwise aclocal's initial scan pass would miss the macro definition.
dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
dnl warnings.
AC_DEFUN_ONCE([gl_LIBUNISTRING],
[
AC_BEFORE([$0], [gl_LIBUNISTRING_MODULE])
AC_BEFORE([$0], [gl_LIBUNISTRING_LIBHEADER])
AC_BEFORE([$0], [gl_LIBUNISTRING_LIB_PREPARE])
m4_ifdef([gl_LIBUNISTRING_OPTIONAL],
[
AC_MSG_CHECKING([whether included libunistring is requested])
AC_ARG_WITH([included-libunistring],
[ --with-included-libunistring use the libunistring parts included here],
[gl_libunistring_force_included=$withval],
[gl_libunistring_force_included=no])
AC_MSG_RESULT([$gl_libunistring_force_included])
gl_libunistring_use_included="$gl_libunistring_force_included"
if test "$gl_libunistring_use_included" = yes; then
dnl Assume that libunistring is not installed until some other macro
dnl explicitly invokes gl_LIBUNISTRING_CORE.
if test -z "$HAVE_LIBUNISTRING"; then
HAVE_LIBUNISTRING=no
fi
LIBUNISTRING=
LTLIBUNISTRING=
else
gl_LIBUNISTRING_CORE
if test $HAVE_LIBUNISTRING = no; then
gl_libunistring_use_included=yes
LIBUNISTRING=
LTLIBUNISTRING=
fi
fi
],
[gl_LIBUNISTRING_CORE])
])
AC_DEFUN([gl_LIBUNISTRING_CORE],
[
AC_REQUIRE([AM_ICONV])
if test -n "$LIBICONV"; then
dnl First, try to link without -liconv. libunistring often depends on
dnl libiconv, but we don't know (and often don't need to know) where
dnl libiconv is installed.
AC_LIB_HAVE_LINKFLAGS([unistring], [],
[#include <uniconv.h>], [u8_strconv_from_locale((char*)0);],
[no, trying again together with libiconv])
if test "$ac_cv_libunistring" != yes; then
dnl Second try, with -liconv.
dnl We have to erase the cached result of the first AC_LIB_HAVE_LINKFLAGS
dnl invocation, otherwise the second one will not be run.
unset ac_cv_libunistring
glus_save_LIBS="$LIBS"
LIBS="$LIBS $LIBICONV"
AC_LIB_HAVE_LINKFLAGS([unistring], [],
[#include <uniconv.h>], [u8_strconv_from_locale((char*)0);],
[no, consider installing GNU libunistring])
if test -n "$LIBUNISTRING"; then
LIBUNISTRING="$LIBUNISTRING $LIBICONV"
LTLIBUNISTRING="$LTLIBUNISTRING $LTLIBICONV"
fi
LIBS="$glus_save_LIBS"
fi
else
AC_LIB_HAVE_LINKFLAGS([unistring], [],
[#include <uniconv.h>], [u8_strconv_from_locale((char*)0);],
[no, consider installing GNU libunistring])
fi
if test $HAVE_LIBUNISTRING = yes; then
dnl Determine the installed version.
AC_CACHE_CHECK([for libunistring version], [gl_cv_libunistring_version],
[AC_COMPUTE_INT([gl_libunistring_hexversion],
[_LIBUNISTRING_VERSION],
[#include <unistring/version.h>])
dnl Versions <= 0.9.3 had a hexversion of 0x0009.
dnl Use other tests to distinguish them.
if test $gl_libunistring_hexversion = 9; then
dnl Version 0.9.2 introduced the header <unistring/cdefs.h>.
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <unistring/cdefs.h>]], [[]])],
[gl_cv_libunistring_version092=true],
[gl_cv_libunistring_version092=false])
if $gl_cv_libunistring_version092; then
dnl Version 0.9.3 changed a comment in <unistr.h>.
gl_ABSOLUTE_HEADER_ONE([unistr.h])
if test -n "$gl_cv_absolute_unistr_h" \
&& grep 'Copy no more than N units of SRC to DEST. Return a pointer' $gl_cv_absolute_unistr_h > /dev/null; then
dnl Detected version 0.9.3.
gl_libunistring_hexversion=2307
else
dnl Detected version 0.9.2.
gl_libunistring_hexversion=2306
fi
else
dnl Version 0.9.1 introduced the type casing_suffix_context_t.
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <unicase.h>
casing_suffix_context_t ct;]],
[[]])],
[gl_cv_libunistring_version091=true],
[gl_cv_libunistring_version091=false])
if $gl_cv_libunistring_version091; then
dnl Detected version 0.9.1.
gl_libunistring_hexversion=2305
else
dnl Detected version 0.9.
gl_libunistring_hexversion=2304
fi
fi
fi
dnl Transform into the usual major.minor.subminor notation.
gl_libunistring_major=`expr $gl_libunistring_hexversion / 65536`
gl_libunistring_minor=`expr $gl_libunistring_hexversion / 256 % 256`
gl_libunistring_subminor=`expr $gl_libunistring_hexversion % 256`
gl_cv_libunistring_version="$gl_libunistring_major.$gl_libunistring_minor.$gl_libunistring_subminor"
])
LIBUNISTRING_VERSION="$gl_cv_libunistring_version"
fi
])
|
