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e8864b1b RK |
1 | # lib-ld.m4 serial 9 |
2 | dnl Copyright (C) 1996-2003, 2009-2019 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. | |
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 | ]) |