Skip to content

Commit 0b8dabf

Browse files
wedesoftwedesoft
committed
Add lib-prefix.m4
1 parent fbc1dfc commit 0b8dabf

File tree

1 file changed

+320
-0
lines changed

1 file changed

+320
-0
lines changed

‎m4/lib-prefix.m4

Lines changed: 320 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,320 @@
1+
# lib-prefix.m4 serial 17
2+
dnl Copyright (C) 2001-2005, 2008-2020 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_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 a user will want packages to use other packages he previously installed
12+
dnl with the same --prefix option.
13+
dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
14+
dnl libraries, but is otherwise very convenient.
15+
AC_DEFUN([AC_LIB_PREFIX],
16+
[
17+
AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
18+
AC_REQUIRE([AC_PROG_CC])
19+
AC_REQUIRE([AC_CANONICAL_HOST])
20+
AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
21+
AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
22+
dnl By default, look in $includedir and $libdir.
23+
use_additional=yes
24+
AC_LIB_WITH_FINAL_PREFIX([
25+
eval additional_includedir=\"$includedir\"
26+
eval additional_libdir=\"$libdir\"
27+
])
28+
AC_ARG_WITH([lib-prefix],
29+
[[ --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
30+
--without-lib-prefix don't search for libraries in includedir and libdir]],
31+
[
32+
if test "X$withval" = "Xno"; then
33+
use_additional=no
34+
else
35+
if test "X$withval" = "X"; then
36+
AC_LIB_WITH_FINAL_PREFIX([
37+
eval additional_includedir=\"$includedir\"
38+
eval additional_libdir=\"$libdir\"
39+
])
40+
else
41+
additional_includedir="$withval/include"
42+
additional_libdir="$withval/$acl_libdirstem"
43+
fi
44+
fi
45+
])
46+
if test $use_additional = yes; then
47+
dnl Potentially add $additional_includedir to $CPPFLAGS.
48+
dnl But don't add it
49+
dnl 1. if it's the standard /usr/include,
50+
dnl 2. if it's already present in $CPPFLAGS,
51+
dnl 3. if it's /usr/local/include and we are using GCC on Linux,
52+
dnl 4. if it doesn't exist as a directory.
53+
if test "X$additional_includedir" != "X/usr/include"; then
54+
haveit=
55+
for x in $CPPFLAGS; do
56+
AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
57+
if test "X$x" = "X-I$additional_includedir"; then
58+
haveit=yes
59+
break
60+
fi
61+
done
62+
if test -z "$haveit"; then
63+
if test "X$additional_includedir" = "X/usr/local/include"; then
64+
if test -n "$GCC"; then
65+
case $host_os in
66+
linux* | gnu* | k*bsd*-gnu) haveit=yes;;
67+
esac
68+
fi
69+
fi
70+
if test -z "$haveit"; then
71+
if test -d "$additional_includedir"; then
72+
dnl Really add $additional_includedir to $CPPFLAGS.
73+
CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
74+
fi
75+
fi
76+
fi
77+
fi
78+
dnl Potentially add $additional_libdir to $LDFLAGS.
79+
dnl But don't add it
80+
dnl 1. if it's the standard /usr/lib,
81+
dnl 2. if it's already present in $LDFLAGS,
82+
dnl 3. if it's /usr/local/lib and we are using GCC on Linux,
83+
dnl 4. if it doesn't exist as a directory.
84+
if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
85+
haveit=
86+
for x in $LDFLAGS; do
87+
AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
88+
if test "X$x" = "X-L$additional_libdir"; then
89+
haveit=yes
90+
break
91+
fi
92+
done
93+
if test -z "$haveit"; then
94+
if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
95+
if test -n "$GCC"; then
96+
case $host_os in
97+
linux*) haveit=yes;;
98+
esac
99+
fi
100+
fi
101+
if test -z "$haveit"; then
102+
if test -d "$additional_libdir"; then
103+
dnl Really add $additional_libdir to $LDFLAGS.
104+
LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
105+
fi
106+
fi
107+
fi
108+
fi
109+
fi
110+
])
111+
112+
dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
113+
dnl acl_final_exec_prefix, containing the values to which $prefix and
114+
dnl $exec_prefix will expand at the end of the configure script.
115+
AC_DEFUN([AC_LIB_PREPARE_PREFIX],
116+
[
117+
dnl Unfortunately, prefix and exec_prefix get only finally determined
118+
dnl at the end of configure.
119+
if test "X$prefix" = "XNONE"; then
120+
acl_final_prefix="$ac_default_prefix"
121+
else
122+
acl_final_prefix="$prefix"
123+
fi
124+
if test "X$exec_prefix" = "XNONE"; then
125+
acl_final_exec_prefix='${prefix}'
126+
else
127+
acl_final_exec_prefix="$exec_prefix"
128+
fi
129+
acl_save_prefix="$prefix"
130+
prefix="$acl_final_prefix"
131+
eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
132+
prefix="$acl_save_prefix"
133+
])
134+
135+
dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
136+
dnl variables prefix and exec_prefix bound to the values they will have
137+
dnl at the end of the configure script.
138+
AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
139+
[
140+
acl_save_prefix="$prefix"
141+
prefix="$acl_final_prefix"
142+
acl_save_exec_prefix="$exec_prefix"
143+
exec_prefix="$acl_final_exec_prefix"
144+
$1
145+
exec_prefix="$acl_save_exec_prefix"
146+
prefix="$acl_save_prefix"
147+
])
148+
149+
dnl AC_LIB_PREPARE_MULTILIB creates
150+
dnl - a function acl_is_expected_elfclass, that tests whether standard input
151+
dn; has a 32-bit or 64-bit ELF header, depending on the host CPU ABI,
152+
dnl - 3 variables acl_libdirstem, acl_libdirstem2, acl_libdirstem3, containing
153+
dnl the basename of the libdir to try in turn, either "lib" or "lib64" or
154+
dnl "lib/64" or "lib32" or "lib/sparcv9" or "lib/amd64" or similar.
155+
AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
156+
[
157+
dnl There is no formal standard regarding lib, lib32, and lib64.
158+
dnl On most glibc systems, the current practice is that on a system supporting
159+
dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
160+
dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. However, on
161+
dnl Arch Linux based distributions, it's the opposite: 32-bit libraries go
162+
dnl under $prefix/lib32 and 64-bit libraries go under $prefix/lib.
163+
dnl We determine the compiler's default mode by looking at the compiler's
164+
dnl library search path. If at least one of its elements ends in /lib64 or
165+
dnl points to a directory whose absolute pathname ends in /lib64, we use that
166+
dnl for 64-bit ABIs. Similarly for 32-bit ABIs. Otherwise we use the default,
167+
dnl namely "lib".
168+
dnl On Solaris systems, the current practice is that on a system supporting
169+
dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
170+
dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
171+
dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
172+
AC_REQUIRE([AC_CANONICAL_HOST])
173+
AC_REQUIRE([gl_HOST_CPU_C_ABI_32BIT])
174+
175+
AC_CACHE_CHECK([for ELF binary format], [gl_cv_elf],
176+
[AC_EGREP_CPP([Extensible Linking Format],
177+
[#ifdef __ELF__
178+
Extensible Linking Format
179+
#endif
180+
],
181+
[gl_cv_elf=yes],
182+
[gl_cv_elf=no])
183+
])
184+
if test $gl_cv_elf; then
185+
# Extract the ELF class of a file (5th byte) in decimal.
186+
# Cf. https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
187+
if od -A x < /dev/null >/dev/null 2>/dev/null; then
188+
# Use POSIX od.
189+
func_elfclass ()
190+
{
191+
od -A n -t d1 -j 4 -N 1
192+
}
193+
else
194+
# Use BSD hexdump.
195+
func_elfclass ()
196+
{
197+
dd bs=1 count=1 skip=4 2>/dev/null | hexdump -e '1/1 "%3d "'
198+
echo
199+
}
200+
fi
201+
changequote(,)dnl
202+
case $HOST_CPU_C_ABI_32BIT in
203+
yes)
204+
# 32-bit ABI.
205+
acl_is_expected_elfclass ()
206+
{
207+
test "`func_elfclass | sed -e 's/[ ]//g'`" = 1
208+
}
209+
;;
210+
no)
211+
# 64-bit ABI.
212+
acl_is_expected_elfclass ()
213+
{
214+
test "`func_elfclass | sed -e 's/[ ]//g'`" = 2
215+
}
216+
;;
217+
*)
218+
# Unknown.
219+
acl_is_expected_elfclass ()
220+
{
221+
:
222+
}
223+
;;
224+
esac
225+
changequote([,])dnl
226+
else
227+
acl_is_expected_elfclass ()
228+
{
229+
:
230+
}
231+
fi
232+
233+
dnl Allow the user to override the result by setting acl_cv_libdirstems.
234+
AC_CACHE_CHECK([for the common suffixes of directories in the library search path],
235+
[acl_cv_libdirstems],
236+
[dnl Try 'lib' first, because that's the default for libdir in GNU, see
237+
dnl <https://www.gnu.org/prep/standards/html_node/Directory-Variables.html>.
238+
acl_libdirstem=lib
239+
acl_libdirstem2=
240+
acl_libdirstem3=
241+
case "$host_os" in
242+
solaris*)
243+
dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
244+
dnl <https://docs.oracle.com/cd/E19253-01/816-5138/dev-env/index.html>.
245+
dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
246+
dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
247+
dnl symlink is missing, so we set acl_libdirstem2 too.
248+
if test $HOST_CPU_C_ABI_32BIT = no; then
249+
acl_libdirstem2=lib/64
250+
case "$host_cpu" in
251+
sparc*) acl_libdirstem3=lib/sparcv9 ;;
252+
i*86 | x86_64) acl_libdirstem3=lib/amd64 ;;
253+
esac
254+
fi
255+
;;
256+
*)
257+
dnl If $CC generates code for a 32-bit ABI, the libraries are
258+
dnl surely under $prefix/lib or $prefix/lib32, not $prefix/lib64.
259+
dnl Similarly, if $CC generates code for a 64-bit ABI, the libraries
260+
dnl are surely under $prefix/lib or $prefix/lib64, not $prefix/lib32.
261+
dnl Find the compiler's search path. However, non-system compilers
262+
dnl sometimes have odd library search paths. But we can't simply invoke
263+
dnl '/usr/bin/gcc -print-search-dirs' because that would not take into
264+
dnl account the -m32/-m31 or -m64 options from the $CC or $CFLAGS.
265+
searchpath=`(LC_ALL=C $CC $CPPFLAGS $CFLAGS -print-search-dirs) 2>/dev/null \
266+
| sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
267+
if test $HOST_CPU_C_ABI_32BIT != no; then
268+
# 32-bit or unknown ABI.
269+
if test -d /usr/lib32; then
270+
acl_libdirstem2=lib32
271+
fi
272+
fi
273+
if test $HOST_CPU_C_ABI_32BIT != yes; then
274+
# 64-bit or unknown ABI.
275+
if test -d /usr/lib64; then
276+
acl_libdirstem3=lib64
277+
fi
278+
fi
279+
if test -n "$searchpath"; then
280+
acl_save_IFS="${IFS= }"; IFS=":"
281+
for searchdir in $searchpath; do
282+
if test -d "$searchdir"; then
283+
case "$searchdir" in
284+
*/lib32/ | */lib32 ) acl_libdirstem2=lib32 ;;
285+
*/lib64/ | */lib64 ) acl_libdirstem3=lib64 ;;
286+
*/../ | */.. )
287+
# Better ignore directories of this form. They are misleading.
288+
;;
289+
*) searchdir=`cd "$searchdir" && pwd`
290+
case "$searchdir" in
291+
*/lib32 ) acl_libdirstem2=lib32 ;;
292+
*/lib64 ) acl_libdirstem3=lib64 ;;
293+
esac ;;
294+
esac
295+
fi
296+
done
297+
IFS="$acl_save_IFS"
298+
if test $HOST_CPU_C_ABI_32BIT = yes; then
299+
# 32-bit ABI.
300+
acl_libdirstem3=
301+
fi
302+
if test $HOST_CPU_C_ABI_32BIT = no; then
303+
# 64-bit ABI.
304+
acl_libdirstem2=
305+
fi
306+
fi
307+
;;
308+
esac
309+
test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
310+
test -n "$acl_libdirstem3" || acl_libdirstem3="$acl_libdirstem"
311+
acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2,$acl_libdirstem3"
312+
])
313+
dnl Decompose acl_cv_libdirstems into acl_libdirstem, acl_libdirstem2, and
314+
dnl acl_libdirstem3.
315+
changequote(,)dnl
316+
acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'`
317+
acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,//' -e 's/,.*//'`
318+
acl_libdirstem3=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,[^,]*,//' -e 's/,.*//'`
319+
changequote([,])dnl
320+
])

0 commit comments

Comments
 (0)