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1 # lib-prefix.m4 serial 5 (gettext-0.15)
2 dnl Copyright (C) 2001-2005 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
6
7 dnl From Bruno Haible.
8
9 dnl AC_LIB_ARG_WITH is synonymous to AC_ARG_WITH in autoconf-2.13, and
10 dnl similar to AC_ARG_WITH in autoconf 2.52...2.57 except that is doesn't
11 dnl require excessive bracketing.
12 ifdef([AC_HELP_STRING],
13 [AC_DEFUN([AC_LIB_ARG_WITH], [AC_ARG_WITH([$1],[[$2]],[$3],[$4])])],
14 [AC_DEFUN([AC_][LIB_ARG_WITH], [AC_ARG_WITH([$1],[$2],[$3],[$4])])])
15
16 dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
17 dnl to access previously installed libraries. The basic assumption is that
18 dnl a user will want packages to use other packages he previously installed
19 dnl with the same --prefix option.
20 dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
21 dnl libraries, but is otherwise very convenient.
22 AC_DEFUN([AC_LIB_PREFIX],
23 [
24 AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
25 AC_REQUIRE([AC_PROG_CC])
26 AC_REQUIRE([AC_CANONICAL_HOST])
27 AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
28 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
29 dnl By default, look in $includedir and $libdir.
30 use_additional=yes
31 AC_LIB_WITH_FINAL_PREFIX([
32 eval additional_includedir=\"$includedir\"
33 eval additional_libdir=\"$libdir\"
34 ])
35 AC_LIB_ARG_WITH([lib-prefix],
36 [ --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
37 --without-lib-prefix don't search for libraries in includedir and libdir],
38 [
39 if test "X$withval" = "Xno"; then
40 use_additional=no
41 else
42 if test "X$withval" = "X"; then
43 AC_LIB_WITH_FINAL_PREFIX([
44 eval additional_includedir=\"$includedir\"
45 eval additional_libdir=\"$libdir\"
46 ])
47 else
48 additional_includedir="$withval/include"
49 additional_libdir="$withval/$acl_libdirstem"
50 fi
51 fi
52 ])
53 if test $use_additional = yes; then
54 dnl Potentially add $additional_includedir to $CPPFLAGS.
55 dnl But don't add it
56 dnl 1. if it's the standard /usr/include,
57 dnl 2. if it's already present in $CPPFLAGS,
58 dnl 3. if it's /usr/local/include and we are using GCC on Linux,
59 dnl 4. if it doesn't exist as a directory.
60 if test "X$additional_includedir" != "X/usr/include"; then
61 haveit=
62 for x in $CPPFLAGS; do
63 AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
64 if test "X$x" = "X-I$additional_includedir"; then
65 haveit=yes
66 break
67 fi
68 done
69 if test -z "$haveit"; then
70 if test "X$additional_includedir" = "X/usr/local/include"; then
71 if test -n "$GCC"; then
72 case $host_os in
73 linux* | gnu* | k*bsd*-gnu) haveit=yes;;
74 esac
75 fi
76 fi
77 if test -z "$haveit"; then
78 if test -d "$additional_includedir"; then
79 dnl Really add $additional_includedir to $CPPFLAGS.
80 CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
81 fi
82 fi
83 fi
84 fi
85 dnl Potentially add $additional_libdir to $LDFLAGS.
86 dnl But don't add it
87 dnl 1. if it's the standard /usr/lib,
88 dnl 2. if it's already present in $LDFLAGS,
89 dnl 3. if it's /usr/local/lib and we are using GCC on Linux,
90 dnl 4. if it doesn't exist as a directory.
91 if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
92 haveit=
93 for x in $LDFLAGS; do
94 AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
95 if test "X$x" = "X-L$additional_libdir"; then
96 haveit=yes
97 break
98 fi
99 done
100 if test -z "$haveit"; then
101 if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
102 if test -n "$GCC"; then
103 case $host_os in
104 linux*) haveit=yes;;
105 esac
106 fi
107 fi
108 if test -z "$haveit"; then
109 if test -d "$additional_libdir"; then
110 dnl Really add $additional_libdir to $LDFLAGS.
111 LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
112 fi
113 fi
114 fi
115 fi
116 fi
117 ])
118
119 dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
120 dnl acl_final_exec_prefix, containing the values to which $prefix and
121 dnl $exec_prefix will expand at the end of the configure script.
122 AC_DEFUN([AC_LIB_PREPARE_PREFIX],
123 [
124 dnl Unfortunately, prefix and exec_prefix get only finally determined
125 dnl at the end of configure.
126 if test "X$prefix" = "XNONE"; then
127 acl_final_prefix="$ac_default_prefix"
128 else
129 acl_final_prefix="$prefix"
130 fi
131 if test "X$exec_prefix" = "XNONE"; then
132 acl_final_exec_prefix='${prefix}'
133 else
134 acl_final_exec_prefix="$exec_prefix"
135 fi
136 acl_save_prefix="$prefix"
137 prefix="$acl_final_prefix"
138 eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
139 prefix="$acl_save_prefix"
140 ])
141
142 dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
143 dnl variables prefix and exec_prefix bound to the values they will have
144 dnl at the end of the configure script.
145 AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
146 [
147 acl_save_prefix="$prefix"
148 prefix="$acl_final_prefix"
149 acl_save_exec_prefix="$exec_prefix"
150 exec_prefix="$acl_final_exec_prefix"
151 $1
152 exec_prefix="$acl_save_exec_prefix"
153 prefix="$acl_save_prefix"
154 ])
155
156 dnl AC_LIB_PREPARE_MULTILIB creates a variable acl_libdirstem, containing
157 dnl the basename of the libdir, either "lib" or "lib64".
158 AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
159 [
160 dnl There is no formal standard regarding lib and lib64. The current
161 dnl practice is that on a system supporting 32-bit and 64-bit instruction
162 dnl sets or ABIs, 64-bit libraries go under $prefix/lib64 and 32-bit
163 dnl libraries go under $prefix/lib. We determine the compiler's default
164 dnl mode by looking at the compiler's library search path. If at least
165 dnl of its elements ends in /lib64 or points to a directory whose absolute
166 dnl pathname ends in /lib64, we assume a 64-bit ABI. Otherwise we use the
167 dnl default, namely "lib".
168 acl_libdirstem=lib
169 searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
170 if test -n "$searchpath"; then
171 acl_save_IFS="${IFS= }"; IFS=":"
172 for searchdir in $searchpath; do
173 if test -d "$searchdir"; then
174 case "$searchdir" in
175 */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
176 *) searchdir=`cd "$searchdir" && pwd`
177 case "$searchdir" in
178 */lib64 ) acl_libdirstem=lib64 ;;
179 esac ;;
180 esac
181 fi
182 done
183 IFS="$acl_save_IFS"
184 fi
185 ])