1 #http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_check_linker_flags.m4 2 # =========================================================================== 3 # http://www.gnu.org/software/autoconf-archive/ax_check_linker_flags.html 4 # =========================================================================== 5 # 6 # SYNOPSIS 7 # 8 # AX_CHECK_LINKER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE]) 9 # 10 # DESCRIPTION 11 # 12 # Check whether the given linker FLAGS work with the current language's 13 # linker, or whether they give an error. 14 # 15 # ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on 16 # success/failure. 17 # 18 # NOTE: Based on AX_CHECK_COMPILER_FLAGS. 19 # 20 # LICENSE 21 # 22 # Copyright (c) 2009 Mike Frysinger <vapier (a] gentoo.org> 23 # Copyright (c) 2009 Steven G. Johnson <stevenj (a] alum.mit.edu> 24 # Copyright (c) 2009 Matteo Frigo 25 # 26 # This program is free software: you can redistribute it and/or modify it 27 # under the terms of the GNU General Public License as published by the 28 # Free Software Foundation, either version 3 of the License, or (at your 29 # option) any later version. 30 # 31 # This program is distributed in the hope that it will be useful, but 32 # WITHOUT ANY WARRANTY; without even the implied warranty of 33 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 34 # Public License for more details. 35 # 36 # You should have received a copy of the GNU General Public License along 37 # with this program. If not, see <http://www.gnu.org/licenses/>. 38 # 39 # As a special exception, the respective Autoconf Macro's copyright owner 40 # gives unlimited permission to copy, distribute and modify the configure 41 # scripts that are the output of Autoconf when processing the Macro. You 42 # need not follow the terms of the GNU General Public License when using 43 # or distributing such scripts, even though portions of the text of the 44 # Macro appear in them. The GNU General Public License (GPL) does govern 45 # all other use of the material that constitutes the Autoconf Macro. 46 # 47 # This special exception to the GPL applies to versions of the Autoconf 48 # Macro released by the Autoconf Archive. When you make and distribute a 49 # modified version of the Autoconf Macro, you may extend this special 50 # exception to the GPL to apply to your modified version as well. 51 52 #serial 6 53 54 AC_DEFUN([AX_CHECK_LINKER_FLAGS], 55 [AC_MSG_CHECKING([whether the linker accepts $1]) 56 dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname: 57 AS_LITERAL_IF([$1], 58 [AC_CACHE_VAL(AS_TR_SH(ax_cv_linker_flags_[$1]), [ 59 ax_save_FLAGS=$LDFLAGS 60 LDFLAGS="$1" 61 AC_LINK_IFELSE([AC_LANG_PROGRAM()], 62 AS_TR_SH(ax_cv_linker_flags_[$1])=yes, 63 AS_TR_SH(ax_cv_linker_flags_[$1])=no) 64 LDFLAGS=$ax_save_FLAGS])], 65 [ax_save_FLAGS=$LDFLAGS 66 LDFLAGS="$1" 67 AC_LINK_IFELSE([AC_LANG_PROGRAM()], 68 eval AS_TR_SH(ax_cv_linker_flags_[$1])=yes, 69 eval AS_TR_SH(ax_cv_linker_flags_[$1])=no) 70 LDFLAGS=$ax_save_FLAGS]) 71 eval ax_check_linker_flags=$AS_TR_SH(ax_cv_linker_flags_[$1]) 72 AC_MSG_RESULT($ax_check_linker_flags) 73 if test "x$ax_check_linker_flags" = xyes; then 74 m4_default([$2], :) 75 else 76 m4_default([$3], :) 77 fi 78 ])dnl AX_CHECK_LINKER_FLAGS 79
