tlib-ld.m4 - vaccinewars - be a doctor and try to vaccinate the world
(HTM) git clone git://src.adamsgaard.dk/vaccinewars
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tlib-ld.m4 (5370B)
---
1 # lib-ld.m4 serial 9
2 dnl Copyright (C) 1996-2003, 2009-2020 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 Subroutines of libtool.m4,
8 dnl with replacements s/_*LT_PATH/AC_LIB_PROG/ and s/lt_/acl_/ to avoid
9 dnl collision with libtool.m4.
10
11 dnl From libtool-2.4. Sets the variable with_gnu_ld to yes or no.
12 AC_DEFUN([AC_LIB_PROG_LD_GNU],
13 [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld],
14 [# I'd rather use --version here, but apparently some GNU lds only accept -v.
15 case `$LD -v 2>&1 </dev/null` in
16 *GNU* | *'with BFD'*)
17 acl_cv_prog_gnu_ld=yes
18 ;;
19 *)
20 acl_cv_prog_gnu_ld=no
21 ;;
22 esac])
23 with_gnu_ld=$acl_cv_prog_gnu_ld
24 ])
25
26 dnl From libtool-2.4. Sets the variable LD.
27 AC_DEFUN([AC_LIB_PROG_LD],
28 [AC_REQUIRE([AC_PROG_CC])dnl
29 AC_REQUIRE([AC_CANONICAL_HOST])dnl
30
31 AC_ARG_WITH([gnu-ld],
32 [AS_HELP_STRING([--with-gnu-ld],
33 [assume the C compiler uses GNU ld [default=no]])],
34 [test "$withval" = no || with_gnu_ld=yes],
35 [with_gnu_ld=no])dnl
36
37 # Prepare PATH_SEPARATOR.
38 # The user is always right.
39 if test "${PATH_SEPARATOR+set}" != set; then
40 # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
41 # contains only /bin. Note that ksh looks also at the FPATH variable,
42 # so we have to set that as well for the test.
43 PATH_SEPARATOR=:
44 (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
45 && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
46 || PATH_SEPARATOR=';'
47 }
48 fi
49
50 if test -n "$LD"; then
51 AC_MSG_CHECKING([for ld])
52 elif test "$GCC" = yes; then
53 AC_MSG_CHECKING([for ld used by $CC])
54 elif test "$with_gnu_ld" = yes; then
55 AC_MSG_CHECKING([for GNU ld])
56 else
57 AC_MSG_CHECKING([for non-GNU ld])
58 fi
59 if test -n "$LD"; then
60 # Let the user override the test with a path.
61 :
62 else
63 AC_CACHE_VAL([acl_cv_path_LD],
64 [
65 acl_cv_path_LD= # Final result of this test
66 ac_prog=ld # Program to search in $PATH
67 if test "$GCC" = yes; then
68 # Check if gcc -print-prog-name=ld gives a path.
69 case $host in
70 *-*-mingw*)
71 # gcc leaves a trailing carriage return which upsets mingw
72 acl_output=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
73 *)
74 acl_output=`($CC -print-prog-name=ld) 2>&5` ;;
75 esac
76 case $acl_output in
77 # Accept absolute paths.
78 [[\\/]]* | ?:[[\\/]]*)
79 re_direlt='/[[^/]][[^/]]*/\.\./'
80 # Canonicalize the pathname of ld
81 acl_output=`echo "$acl_output" | sed 's%\\\\%/%g'`
82 while echo "$acl_output" | grep "$re_direlt" > /dev/null 2>&1; do
83 acl_output=`echo $acl_output | sed "s%$re_direlt%/%"`
84 done
85 # Got the pathname. No search in PATH is needed.
86 acl_cv_path_LD="$acl_output"
87 ac_prog=
88 ;;
89 "")
90 # If it fails, then pretend we aren't using GCC.
91 ;;
92 *)
93 # If it is relative, then search for the first ld in PATH.
94 with_gnu_ld=unknown
95 ;;
96 esac
97 fi
98 if test -n "$ac_prog"; then
99 # Search for $ac_prog in $PATH.
100 acl_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
101 for ac_dir in $PATH; do
102 IFS="$acl_save_ifs"
103 test -z "$ac_dir" && ac_dir=.
104 if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
105 acl_cv_path_LD="$ac_dir/$ac_prog"
106 # Check to see if the program is GNU ld. I'd rather use --version,
107 # but apparently some variants of GNU ld only accept -v.
108 # Break only if it was the GNU/non-GNU ld that we prefer.
109 case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in
110 *GNU* | *'with BFD'*)
111 test "$with_gnu_ld" != no && break
112 ;;
113 *)
114 test "$with_gnu_ld" != yes && break
115 ;;
116 esac
117 fi
118 done
119 IFS="$acl_save_ifs"
120 fi
121 case $host in
122 *-*-aix*)
123 AC_COMPILE_IFELSE(
124 [AC_LANG_SOURCE(
125 [[#if defined __powerpc64__ || defined _ARCH_PPC64
126 int ok;
127 #else
128 error fail
129 #endif
130 ]])],
131 [# The compiler produces 64-bit code. Add option '-b64' so that the
132 # linker groks 64-bit object files.
133 case "$acl_cv_path_LD " in
134 *" -b64 "*) ;;
135 *) acl_cv_path_LD="$acl_cv_path_LD -b64" ;;
136 esac
137 ], [])
138 ;;
139 sparc64-*-netbsd*)
140 AC_COMPILE_IFELSE(
141 [AC_LANG_SOURCE(
142 [[#if defined __sparcv9 || defined __arch64__
143 int ok;
144 #else
145 error fail
146 #endif
147 ]])],
148 [],
149 [# The compiler produces 32-bit code. Add option '-m elf32_sparc'
150 # so that the linker groks 32-bit object files.
151 case "$acl_cv_path_LD " in
152 *" -m elf32_sparc "*) ;;
153 *) acl_cv_path_LD="$acl_cv_path_LD -m elf32_sparc" ;;
154 esac
155 ])
156 ;;
157 esac
158 ])
159 LD="$acl_cv_path_LD"
160 fi
161 if test -n "$LD"; then
162 AC_MSG_RESULT([$LD])
163 else
164 AC_MSG_RESULT([no])
165 AC_MSG_ERROR([no acceptable ld found in \$PATH])
166 fi
167 AC_LIB_PROG_LD_GNU
168 ])