1 # lib-prefix.m4 serial 14
2 dnl Copyright (C) 2001-2005, 2008-2019 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.
9 dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
10 dnl to access previously installed libraries. The basic assumption is that
11 dnl packages should use other packages that are installed with the same
12 dnl --prefix option. This macro is not needed if only AC_LIB_LINKFLAGS is
13 dnl used to locate libraries, but is otherwise very convenient.
14 AC_DEFUN([AC_LIB_PREFIX],
16 AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
17 AC_REQUIRE([AC_PROG_CC])
18 AC_REQUIRE([AC_CANONICAL_HOST])
19 AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
20 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
21 dnl By default, look in $includedir and $libdir.
23 AC_LIB_WITH_FINAL_PREFIX([
24 eval additional_includedir=\"$includedir\"
25 eval additional_libdir=\"$libdir\"
27 AC_ARG_WITH([lib-prefix],
28 [[ --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
29 --without-lib-prefix don't search for libraries in includedir and libdir]],
31 if test "X$withval" = "Xno"; then
34 if test "X$withval" = "X"; then
35 AC_LIB_WITH_FINAL_PREFIX([
36 eval additional_includedir=\"$includedir\"
37 eval additional_libdir=\"$libdir\"
40 additional_includedir="$withval/include"
41 additional_libdir="$withval/$acl_libdirstem"
45 if test $use_additional = yes; then
46 dnl Potentially add $additional_includedir to $CPPFLAGS.
48 dnl 1. if it's the standard /usr/include,
49 dnl 2. if it's already present in $CPPFLAGS,
50 dnl 3. if it's /usr/local/include and we are using GCC on Linux,
51 dnl 4. if it doesn't exist as a directory.
52 if test "X$additional_includedir" != "X/usr/include"; then
54 for x in $CPPFLAGS; do
55 AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
56 if test "X$x" = "X-I$additional_includedir"; then
61 if test -z "$haveit"; then
62 if test "X$additional_includedir" = "X/usr/local/include"; then
63 if test -n "$GCC"; then
65 linux* | gnu* | k*bsd*-gnu) haveit=yes;;
69 if test -z "$haveit"; then
70 if test -d "$additional_includedir"; then
71 dnl Really add $additional_includedir to $CPPFLAGS.
72 CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
77 dnl Potentially add $additional_libdir to $LDFLAGS.
79 dnl 1. if it's the standard /usr/lib,
80 dnl 2. if it's already present in $LDFLAGS,
81 dnl 3. if it's /usr/local/lib and we are using GCC on Linux,
82 dnl 4. if it doesn't exist as a directory.
83 if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
86 AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
87 if test "X$x" = "X-L$additional_libdir"; then
92 if test -z "$haveit"; then
93 if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
94 if test -n "$GCC"; then
100 if test -z "$haveit"; then
101 if test -d "$additional_libdir"; then
102 dnl Really add $additional_libdir to $LDFLAGS.
103 LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
111 dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
112 dnl acl_final_exec_prefix, containing the values to which $prefix and
113 dnl $exec_prefix will expand at the end of the configure script.
114 AC_DEFUN([AC_LIB_PREPARE_PREFIX],
116 dnl Unfortunately, prefix and exec_prefix get only finally determined
117 dnl at the end of configure.
118 if test "X$prefix" = "XNONE"; then
119 acl_final_prefix="$ac_default_prefix"
121 acl_final_prefix="$prefix"
123 if test "X$exec_prefix" = "XNONE"; then
124 acl_final_exec_prefix='${prefix}'
126 acl_final_exec_prefix="$exec_prefix"
128 acl_save_prefix="$prefix"
129 prefix="$acl_final_prefix"
130 eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
131 prefix="$acl_save_prefix"
134 dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
135 dnl variables prefix and exec_prefix bound to the values they will have
136 dnl at the end of the configure script.
137 AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
139 acl_save_prefix="$prefix"
140 prefix="$acl_final_prefix"
141 acl_save_exec_prefix="$exec_prefix"
142 exec_prefix="$acl_final_exec_prefix"
144 exec_prefix="$acl_save_exec_prefix"
145 prefix="$acl_save_prefix"
148 dnl AC_LIB_PREPARE_MULTILIB creates
149 dnl - a variable acl_libdirstem, containing the basename of the libdir, either
150 dnl "lib" or "lib64" or "lib/64",
151 dnl - a variable acl_libdirstem2, as a secondary possible value for
152 dnl acl_libdirstem, either the same as acl_libdirstem or "lib/sparcv9" or
154 AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
156 dnl There is no formal standard regarding lib and lib64.
157 dnl On glibc systems, the current practice is that on a system supporting
158 dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
159 dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. We determine
160 dnl the compiler's default mode by looking at the compiler's library search
161 dnl path. If at least one of its elements ends in /lib64 or points to a
162 dnl directory whose absolute pathname ends in /lib64, we assume a 64-bit ABI.
163 dnl Otherwise we use the default, namely "lib".
164 dnl On Solaris systems, the current practice is that on a system supporting
165 dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
166 dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
167 dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
168 AC_REQUIRE([AC_CANONICAL_HOST])
169 AC_REQUIRE([gl_HOST_CPU_C_ABI_32BIT])
173 AC_CACHE_CHECK([for 64-bit host], [gl_cv_solaris_64bit],
182 [gl_cv_solaris_64bit=yes],
183 [gl_cv_solaris_64bit=no])
187 dnl Allow the user to override the result by setting acl_cv_libdirstems.
188 AC_CACHE_CHECK([for the common suffixes of directories in the library search path],
189 [acl_cv_libdirstems],
194 dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
195 dnl <https://docs.oracle.com/cd/E19253-01/816-5138/dev-env/index.html>.
196 dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
197 dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
198 dnl symlink is missing, so we set acl_libdirstem2 too.
199 if test $gl_cv_solaris_64bit = yes; then
200 acl_libdirstem=lib/64
202 sparc*) acl_libdirstem2=lib/sparcv9 ;;
203 i*86 | x86_64) acl_libdirstem2=lib/amd64 ;;
208 dnl If $CC generates code for a 32-bit ABI, the libraries are
209 dnl surely under $prefix/lib, not $prefix/lib64.
210 if test "$HOST_CPU_C_ABI_32BIT" != yes; then
211 dnl The result is a property of the system. However, non-system
212 dnl compilers sometimes have odd library search paths. Therefore
213 dnl prefer asking /usr/bin/gcc, if available, rather than $CC.
214 searchpath=`(if test -f /usr/bin/gcc \
215 && LC_ALL=C /usr/bin/gcc -print-search-dirs >/dev/null 2>/dev/null; then \
216 LC_ALL=C /usr/bin/gcc -print-search-dirs; \
218 LC_ALL=C $CC -print-search-dirs; \
220 | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
221 if test -n "$searchpath"; then
222 acl_save_IFS="${IFS= }"; IFS=":"
223 for searchdir in $searchpath; do
224 if test -d "$searchdir"; then
226 */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
228 # Better ignore directories of this form. They are misleading.
230 *) searchdir=`cd "$searchdir" && pwd`
232 */lib64 ) acl_libdirstem=lib64 ;;
242 test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
243 acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2"
245 # Decompose acl_cv_libdirstems into acl_libdirstem and acl_libdirstem2.
246 acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'`
247 acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e '/,/s/.*,//'`