projects / thirdparty / lldpd.git / blame
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|---|---|---|
| a37f8fd6 VB |
1 | # =========================================================================== |
| 2 | # http://www.gnu.org/software/autoconf-archive/ax_ld_check_flag.html | |
| 3 | # =========================================================================== | |
| 4 | # | |
| 5 | # SYNOPSIS | |
| 6 | # | |
| 7 | # AX_LD_CHECK_FLAG(FLAG-TO-CHECK,[PROLOGUE],[BODY],[ACTION-IF-SUCCESS],[ACTION-IF-FAILURE]) | |
| 8 | # | |
| 9 | # DESCRIPTION | |
| 10 | # | |
| 11 | # This macro tests if the C++ compiler supports the flag FLAG-TO-CHECK. If | |
| 12 | # successfull execute ACTION-IF-SUCCESS otherwise ACTION-IF-FAILURE. | |
| 13 | # PROLOGUE and BODY are optional and should be used as in AC_LANG_PROGRAM | |
| 14 | # macro. | |
| 15 | # | |
| 16 | # Example: | |
| 17 | # | |
| 18 | # AX_LD_CHECK_FLAG([-Wl,-L/usr/lib],[],[],[ | |
| 19 | # ... | |
| 20 | # ],[ | |
| 21 | # ... | |
| 22 | # ]) | |
| 23 | # | |
| 24 | # This code is inspired from KDE_CHECK_COMPILER_FLAG macro. Thanks to | |
| 25 | # Bogdan Drozdowski <bogdandr@op.pl> for testing and bug fixes. | |
| 26 | # | |
| 27 | # LICENSE | |
| 28 | # | |
| 29 | # Copyright (c) 2008 Francesco Salvestrini <salvestrini@users.sourceforge.net> | |
| 30 | # | |
| 31 | # This program is free software; you can redistribute it and/or modify it | |
| 32 | # under the terms of the GNU General Public License as published by the | |
| 33 | # Free Software Foundation; either version 2 of the License, or (at your | |
| 34 | # option) any later version. | |
| 35 | # | |
| 36 | # This program is distributed in the hope that it will be useful, but | |
| 37 | # WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 38 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | |
| 39 | # Public License for more details. | |
| 40 | # | |
| 41 | # You should have received a copy of the GNU General Public License along | |
| 42 | # with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 43 | # | |
| 44 | # As a special exception, the respective Autoconf Macro's copyright owner | |
| 45 | # gives unlimited permission to copy, distribute and modify the configure | |
| 46 | # scripts that are the output of Autoconf when processing the Macro. You | |
| 47 | # need not follow the terms of the GNU General Public License when using | |
| 48 | # or distributing such scripts, even though portions of the text of the | |
| 49 | # Macro appear in them. The GNU General Public License (GPL) does govern | |
| 50 | # all other use of the material that constitutes the Autoconf Macro. | |
| 51 | # | |
| 52 | # This special exception to the GPL applies to versions of the Autoconf | |
| 53 | # Macro released by the Autoconf Archive. When you make and distribute a | |
| 54 | # modified version of the Autoconf Macro, you may extend this special | |
| 55 | # exception to the GPL to apply to your modified version as well. | |
| 56 | ||
| 57 | #serial 6 | |
| 58 | ||
| 59 | AC_DEFUN([AX_LD_CHECK_FLAG],[ | |
| 60 | AC_PREREQ([2.61]) | |
| 61 | AC_REQUIRE([AC_PROG_CXX]) | |
| 62 | AC_REQUIRE([AC_PROG_SED]) | |
| 63 | ||
| 64 | flag=`echo "$1" | $SED 'y% .=/+-(){}<>:*,%_______________%'` | |
| 65 | ||
| 66 | AC_CACHE_CHECK([whether the linker accepts the $1 flag], | |
| 67 | [ax_cv_ld_check_flag_$flag],[ | |
| 68 | ||
| 69 | #AC_LANG_PUSH([C]) | |
| 70 | ||
| 71 | save_LDFLAGS="$LDFLAGS" | |
| 72 | LDFLAGS="$LDFLAGS $1" | |
| 73 | AC_LINK_IFELSE([ | |
| 74 | AC_LANG_PROGRAM([$2],[$3]) | |
| 75 | ],[ | |
| 76 | eval "ax_cv_ld_check_flag_$flag=yes" | |
| 77 | ],[ | |
| 78 | eval "ax_cv_ld_check_flag_$flag=no" | |
| 79 | ]) | |
| 80 | ||
| 81 | LDFLAGS="$save_LDFLAGS" | |
| 82 | ||
| 83 | #AC_LANG_POP | |
| 84 | ||
| 85 | ]) | |
| 86 | ||
| 87 | AS_IF([eval "test \"`echo '$ax_cv_ld_check_flag_'$flag`\" = yes"],[ | |
| 88 | : | |
| 89 | $4 | |
| 90 | ],[ | |
| 91 | : | |
| 92 | $5 | |
| 93 | ]) | |
| 94 | ]) | |
| 95 | ||
| 96 | AC_DEFUN([AX_LDFLAGS_OPTION],[ | |
| 97 | AX_LD_CHECK_FLAG([$1],[],[],[LDFLAGS="$LDFLAGS $1"])]) |