61 lines
2.6 KiB
Plaintext
61 lines
2.6 KiB
Plaintext
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dnl Macros to check the presence of generic (non-typed) symbols.
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dnl Copyright (c) 2006-2008 Diego Pettenò <flameeyes@gmail.com>
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dnl Copyright (c) 2006-2008 xine project
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dnl Copyright (c) 2012 Lucas De Marchi <lucas.de.marchi@gmail.com>
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dnl
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dnl This program is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU General Public License as published by
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dnl the Free Software Foundation; either version 2, or (at your option)
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dnl any later version.
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dnl
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dnl This program is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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dnl GNU General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU General Public License
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dnl along with this program; if not, write to the Free Software
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dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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dnl 02110-1301, USA.
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dnl
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dnl As a special exception, the copyright owners of the
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dnl macro gives unlimited permission to copy, distribute and modify the
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dnl configure scripts that are the output of Autoconf when processing the
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dnl Macro. You need not follow the terms of the GNU General Public
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dnl License when using or distributing such scripts, even though portions
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dnl of the text of the Macro appear in them. The GNU General Public
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dnl License (GPL) does govern all other use of the material that
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dnl constitutes the Autoconf Macro.
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dnl
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dnl This special exception to the GPL applies to versions of the
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dnl Autoconf Macro released by this project. When you make and
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dnl distribute a modified version of the Autoconf Macro, you may extend
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dnl this special exception to the GPL to apply to your modified version as
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dnl well.
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dnl Check if FLAG in ENV-VAR is supported by compiler and append it
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dnl to WHERE-TO-APPEND variable
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dnl CC_CHECK_FLAG_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG])
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AC_DEFUN([CC_CHECK_FLAG_APPEND], [
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AC_CACHE_CHECK([if $CC supports flag $3 in envvar $2],
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AS_TR_SH([cc_cv_$2_$3]),
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[eval "AS_TR_SH([cc_save_$2])='${$2}'"
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eval "AS_TR_SH([$2])='$3'"
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a = 0; int main(void) { return a; } ])],
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[eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
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[eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
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eval "AS_TR_SH([$2])='$cc_save_$2'"])
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AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
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[eval "$1='${$1} $3'"])
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])
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dnl CC_CHECK_FLAGS_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG1 FLAG2])
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AC_DEFUN([CC_CHECK_FLAGS_APPEND], [
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for flag in $3; do
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CC_CHECK_FLAG_APPEND($1, $2, $flag)
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done
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])
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