Commit | Line | Data |
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7ae4e75a | 1 | # lib-ld.m4 serial 6 |
af07e104 | 2 | dnl Copyright (C) 1996-2003, 2009-2013 Free Software Foundation, Inc. |
24d56127 LC |
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, | |
7ae4e75a LC |
8 | dnl with replacements s/_*LT_PATH/AC_LIB_PROG/ and s/lt_/acl_/ to avoid |
9 | dnl collision with libtool.m4. | |
24d56127 | 10 | |
7ae4e75a | 11 | dnl From libtool-2.4. Sets the variable with_gnu_ld to yes or no. |
24d56127 LC |
12 | AC_DEFUN([AC_LIB_PROG_LD_GNU], |
13 | [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld], | |
7ae4e75a | 14 | [# I'd rather use --version here, but apparently some GNU lds only accept -v. |
24d56127 LC |
15 | case `$LD -v 2>&1 </dev/null` in |
16 | *GNU* | *'with BFD'*) | |
7ae4e75a LC |
17 | acl_cv_prog_gnu_ld=yes |
18 | ;; | |
24d56127 | 19 | *) |
7ae4e75a LC |
20 | acl_cv_prog_gnu_ld=no |
21 | ;; | |
24d56127 LC |
22 | esac]) |
23 | with_gnu_ld=$acl_cv_prog_gnu_ld | |
24 | ]) | |
25 | ||
7ae4e75a | 26 | dnl From libtool-2.4. Sets the variable LD. |
24d56127 | 27 | AC_DEFUN([AC_LIB_PROG_LD], |
7ae4e75a | 28 | [AC_REQUIRE([AC_PROG_CC])dnl |
24d56127 | 29 | AC_REQUIRE([AC_CANONICAL_HOST])dnl |
7ae4e75a LC |
30 | |
31 | AC_ARG_WITH([gnu-ld], | |
32 | [AS_HELP_STRING([--with-gnu-ld], | |
33 | [assume the C compiler uses GNU ld [default=no]])], | |
34 | [test "$withval" = no || with_gnu_ld=yes], | |
35 | [with_gnu_ld=no])dnl | |
36 | ||
24d56127 LC |
37 | # Prepare PATH_SEPARATOR. |
38 | # The user is always right. | |
39 | if test "${PATH_SEPARATOR+set}" != set; then | |
9157d901 LC |
40 | # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which |
41 | # contains only /bin. Note that ksh looks also at the FPATH variable, | |
42 | # so we have to set that as well for the test. | |
43 | PATH_SEPARATOR=: | |
44 | (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \ | |
45 | && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \ | |
46 | || PATH_SEPARATOR=';' | |
47 | } | |
24d56127 | 48 | fi |
7ae4e75a | 49 | |
24d56127 LC |
50 | ac_prog=ld |
51 | if test "$GCC" = yes; then | |
52 | # Check if gcc -print-prog-name=ld gives a path. | |
7ae4e75a | 53 | AC_MSG_CHECKING([for ld used by $CC]) |
24d56127 LC |
54 | case $host in |
55 | *-*-mingw*) | |
56 | # gcc leaves a trailing carriage return which upsets mingw | |
57 | ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;; | |
58 | *) | |
59 | ac_prog=`($CC -print-prog-name=ld) 2>&5` ;; | |
60 | esac | |
61 | case $ac_prog in | |
62 | # Accept absolute paths. | |
7ae4e75a LC |
63 | [[\\/]]* | ?:[[\\/]]*) |
64 | re_direlt='/[[^/]][[^/]]*/\.\./' | |
65 | # Canonicalize the pathname of ld | |
66 | ac_prog=`echo "$ac_prog"| sed 's%\\\\%/%g'` | |
67 | while echo "$ac_prog" | grep "$re_direlt" > /dev/null 2>&1; do | |
1cd4fffc | 68 | ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"` |
24d56127 LC |
69 | done |
70 | test -z "$LD" && LD="$ac_prog" | |
71 | ;; | |
72 | "") | |
73 | # If it fails, then pretend we aren't using GCC. | |
74 | ac_prog=ld | |
75 | ;; | |
76 | *) | |
77 | # If it is relative, then search for the first ld in PATH. | |
78 | with_gnu_ld=unknown | |
79 | ;; | |
80 | esac | |
81 | elif test "$with_gnu_ld" = yes; then | |
82 | AC_MSG_CHECKING([for GNU ld]) | |
83 | else | |
84 | AC_MSG_CHECKING([for non-GNU ld]) | |
85 | fi | |
86 | AC_CACHE_VAL([acl_cv_path_LD], | |
87 | [if test -z "$LD"; then | |
7ae4e75a | 88 | acl_save_ifs="$IFS"; IFS=$PATH_SEPARATOR |
24d56127 | 89 | for ac_dir in $PATH; do |
7ae4e75a | 90 | IFS="$acl_save_ifs" |
24d56127 LC |
91 | test -z "$ac_dir" && ac_dir=. |
92 | if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then | |
93 | acl_cv_path_LD="$ac_dir/$ac_prog" | |
94 | # Check to see if the program is GNU ld. I'd rather use --version, | |
7ae4e75a | 95 | # but apparently some variants of GNU ld only accept -v. |
24d56127 | 96 | # Break only if it was the GNU/non-GNU ld that we prefer. |
7ae4e75a | 97 | case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in |
24d56127 | 98 | *GNU* | *'with BFD'*) |
7ae4e75a LC |
99 | test "$with_gnu_ld" != no && break |
100 | ;; | |
24d56127 | 101 | *) |
7ae4e75a LC |
102 | test "$with_gnu_ld" != yes && break |
103 | ;; | |
24d56127 LC |
104 | esac |
105 | fi | |
106 | done | |
7ae4e75a | 107 | IFS="$acl_save_ifs" |
24d56127 LC |
108 | else |
109 | acl_cv_path_LD="$LD" # Let the user override the test with a path. | |
110 | fi]) | |
111 | LD="$acl_cv_path_LD" | |
112 | if test -n "$LD"; then | |
113 | AC_MSG_RESULT([$LD]) | |
114 | else | |
115 | AC_MSG_RESULT([no]) | |
116 | fi | |
117 | test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH]) | |
118 | AC_LIB_PROG_LD_GNU | |
119 | ]) |