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1 # lib-prefix.m4 serial 7 (gettext-0.18)
2 dnl Copyright (C) 2001-2005, 2008-2010 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
157 dnl - a variable acl_libdirstem, containing the basename of the libdir, either
158 dnl "lib" or "lib64" or "lib/64",
159 dnl - a variable acl_libdirstem2, as a secondary possible value for
160 dnl acl_libdirstem, either the same as acl_libdirstem or "lib/sparcv9" or
161 dnl "lib/amd64".
162 AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
163 [
164 dnl There is no formal standard regarding lib and lib64.
165 dnl On glibc systems, the current practice is that on a system supporting
166 dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
167 dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. We determine
168 dnl the compiler's default mode by looking at the compiler's library search
169 dnl path. If at least one of its elements ends in /lib64 or points to a
170 dnl directory whose absolute pathname ends in /lib64, we assume a 64-bit ABI.
171 dnl Otherwise we use the default, namely "lib".
172 dnl On Solaris systems, the current practice is that on a system supporting
173 dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
174 dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
175 dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
176 AC_REQUIRE([AC_CANONICAL_HOST])
177 acl_libdirstem=lib
178 acl_libdirstem2=
179 case "$host_os" in
180 solaris*)
181 dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
182 dnl <http://docs.sun.com/app/docs/doc/816-5138/dev-env?l=en&a=view>.
183 dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
184 dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
185 dnl symlink is missing, so we set acl_libdirstem2 too.
186 AC_CACHE_CHECK([for 64-bit host], [gl_cv_solaris_64bit],
187 [AC_EGREP_CPP([sixtyfour bits], [
188 #ifdef _LP64
189 sixtyfour bits
190 #endif
191 ], [gl_cv_solaris_64bit=yes], [gl_cv_solaris_64bit=no])
192 ])
193 if test $gl_cv_solaris_64bit = yes; then
194 acl_libdirstem=lib/64
195 case "$host_cpu" in
196 sparc*) acl_libdirstem2=lib/sparcv9 ;;
197 i*86 | x86_64) acl_libdirstem2=lib/amd64 ;;
198 esac
199 fi
200 ;;
201 *)
202 searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
203 if test -n "$searchpath"; then
204 acl_save_IFS="${IFS= }"; IFS=":"
205 for searchdir in $searchpath; do
206 if test -d "$searchdir"; then
207 case "$searchdir" in
208 */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
209 */../ | */.. )
210 # Better ignore directories of this form. They are misleading.
211 ;;
212 *) searchdir=`cd "$searchdir" && pwd`
213 case "$searchdir" in
214 */lib64 ) acl_libdirstem=lib64 ;;
215 esac ;;
216 esac
217 fi
218 done
219 IFS="$acl_save_IFS"
220 fi
221 ;;
222 esac
223 test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
224 ])