| # =========================================================================== |
| # http://www.nongnu.org/autoconf-archive/ax_cflags_gcc_option.html |
| # =========================================================================== |
| # |
| # SYNOPSIS |
| # |
| # AX_CFLAGS_GCC_OPTION (optionflag [,[shellvar][,[A][,[NA]]]) |
| # |
| # DESCRIPTION |
| # |
| # AX_CFLAGS_GCC_OPTION(-fvomit-frame) would show a message as like |
| # "checking CFLAGS for gcc -fvomit-frame ... yes" and adds the optionflag |
| # to CFLAGS if it is understood. You can override the shellvar-default of |
| # CFLAGS of course. The order of arguments stems from the explicit macros |
| # like AX_CFLAGS_WARN_ALL. |
| # |
| # The cousin AX_CXXFLAGS_GCC_OPTION would check for an option to add to |
| # CXXFLAGS - and it uses the autoconf setup for C++ instead of C (since it |
| # is possible to use different compilers for C and C++). |
| # |
| # The macro is a lot simpler than any special AX_CFLAGS_* macro (or |
| # ax_cxx_rtti.m4 macro) but allows to check for arbitrary options. |
| # However, if you use this macro in a few places, it would be great if you |
| # would make up a new function-macro and submit it to the ac-archive. |
| # |
| # - $1 option-to-check-for : required ("-option" as non-value) |
| # - $2 shell-variable-to-add-to : CFLAGS (or CXXFLAGS in the other case) |
| # - $3 action-if-found : add value to shellvariable |
| # - $4 action-if-not-found : nothing |
| # |
| # Note: in earlier versions, $1-$2 were swapped. We try to detect the |
| # situation and accept a $2=~/-/ as being the old option-to-check-for. |
| # |
| # There are other variants that emerged from the original macro variant |
| # which did just test an option to be possibly added. However, some |
| # compilers accept an option silently, or possibly for just another option |
| # that was not intended. Therefore, we have to do a generic test for a |
| # compiler family. For gcc we check "-pedantic" being accepted which is |
| # also understood by compilers who just want to be compatible with gcc |
| # even when not being made from gcc sources. |
| # |
| # See also: AX_CFLAGS_SUN_OPTION, AX_CFLAGS_HPUX_OPTION, |
| # AX_CFLAGS_AIX_OPTION, and AX_CFLAGS_IRIX_OPTION. |
| # |
| # LICENSE |
| # |
| # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> |
| # |
| # This program is free software; you can redistribute it and/or modify it |
| # under the terms of the GNU General Public License as published by the |
| # Free Software Foundation; either version 2 of the License, or (at your |
| # option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, but |
| # WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| # Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License along |
| # with this program. If not, see <http://www.gnu.org/licenses/>. |
| # |
| # As a special exception, the respective Autoconf Macro's copyright owner |
| # gives unlimited permission to copy, distribute and modify the configure |
| # scripts that are the output of Autoconf when processing the Macro. You |
| # need not follow the terms of the GNU General Public License when using |
| # or distributing such scripts, even though portions of the text of the |
| # Macro appear in them. The GNU General Public License (GPL) does govern |
| # all other use of the material that constitutes the Autoconf Macro. |
| # |
| # This special exception to the GPL applies to versions of the Autoconf |
| # Macro released by the Autoconf Archive. When you make and distribute a |
| # modified version of the Autoconf Macro, you may extend this special |
| # exception to the GPL to apply to your modified version as well. |
| |
| #serial 7 |
| |
| AC_DEFUN([AX_CFLAGS_GCC_OPTION_OLD], [dnl |
| AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl |
| AS_VAR_PUSHDEF([VAR],[ax_cv_cflags_gcc_option_$2])dnl |
| AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for gcc m4_ifval($2,$2,-option)], |
| VAR,[VAR="no, unknown" |
| AC_LANG_SAVE |
| AC_LANG_C |
| ac_save_[]FLAGS="$[]FLAGS" |
| for ac_arg dnl |
| in "-pedantic -Werror % m4_ifval($2,$2,-option)" dnl GCC |
| "-pedantic % m4_ifval($2,$2,-option) %% no, obsolete" dnl new GCC |
| # |
| do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` |
| AC_TRY_COMPILE([],[return 0;], |
| [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) |
| done |
| FLAGS="$ac_save_[]FLAGS" |
| AC_LANG_RESTORE |
| ]) |
| case ".$VAR" in |
| .ok|.ok,*) m4_ifvaln($3,$3) ;; |
| .|.no|.no,*) m4_ifvaln($4,$4) ;; |
| *) m4_ifvaln($3,$3,[ |
| if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null |
| then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR]) |
| else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"]) |
| m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR" |
| fi ]) ;; |
| esac |
| AS_VAR_POPDEF([VAR])dnl |
| AS_VAR_POPDEF([FLAGS])dnl |
| ]) |
| |
| |
| dnl the only difference - the LANG selection... and the default FLAGS |
| |
| AC_DEFUN([AX_CXXFLAGS_GCC_OPTION_OLD], [dnl |
| AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl |
| AS_VAR_PUSHDEF([VAR],[ax_cv_cxxflags_gcc_option_$2])dnl |
| AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for gcc m4_ifval($2,$2,-option)], |
| VAR,[VAR="no, unknown" |
| AC_LANG_SAVE |
| AC_LANG_CPLUSPLUS |
| ac_save_[]FLAGS="$[]FLAGS" |
| for ac_arg dnl |
| in "-pedantic -Werror % m4_ifval($2,$2,-option)" dnl GCC |
| "-pedantic % m4_ifval($2,$2,-option) %% no, obsolete" dnl new GCC |
| # |
| do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` |
| AC_TRY_COMPILE([],[return 0;], |
| [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) |
| done |
| FLAGS="$ac_save_[]FLAGS" |
| AC_LANG_RESTORE |
| ]) |
| case ".$VAR" in |
| .ok|.ok,*) m4_ifvaln($3,$3) ;; |
| .|.no|.no,*) m4_ifvaln($4,$4) ;; |
| *) m4_ifvaln($3,$3,[ |
| if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null |
| then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR]) |
| else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"]) |
| m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR" |
| fi ]) ;; |
| esac |
| AS_VAR_POPDEF([VAR])dnl |
| AS_VAR_POPDEF([FLAGS])dnl |
| ]) |
| |
| dnl ------------------------------------------------------------------------- |
| |
| AC_DEFUN([AX_CFLAGS_GCC_OPTION_NEW], [dnl |
| AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl |
| AS_VAR_PUSHDEF([VAR],[ax_cv_cflags_gcc_option_[]m4_translit([[$1]],[=],[_])])dnl |
| AC_CACHE_CHECK([m4_ifval($2,$2,FLAGS) for gcc m4_ifval($1,$1,-option)], |
| VAR,[VAR="no, unknown" |
| AC_LANG_SAVE |
| AC_LANG_C |
| ac_save_[]FLAGS="$[]FLAGS" |
| for ac_arg dnl |
| in "-pedantic -Werror % m4_ifval($1,$1,-option)" dnl GCC |
| "-pedantic % m4_ifval($1,$1,-option) %% no, obsolete" dnl new GCC |
| # |
| do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` |
| AC_TRY_COMPILE([],[return 0;], |
| [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) |
| done |
| FLAGS="$ac_save_[]FLAGS" |
| AC_LANG_RESTORE |
| ]) |
| case ".$VAR" in |
| .ok|.ok,*) m4_ifvaln($3,$3) ;; |
| .|.no|.no,*) m4_ifvaln($4,$4) ;; |
| *) m4_ifvaln($3,$3,[ |
| if echo " $[]m4_ifval($2,$2,FLAGS) " | grep " $VAR " 2>&1 >/dev/null |
| then AC_RUN_LOG([: m4_ifval($2,$2,FLAGS) does contain $VAR]) |
| else AC_RUN_LOG([: m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"]) |
| m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR" |
| fi ]) ;; |
| esac |
| AS_VAR_POPDEF([VAR])dnl |
| AS_VAR_POPDEF([FLAGS])dnl |
| ]) |
| |
| |
| dnl the only difference - the LANG selection... and the default FLAGS |
| |
| AC_DEFUN([AX_CXXFLAGS_GCC_OPTION_NEW], [dnl |
| AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl |
| AS_VAR_PUSHDEF([VAR],[ax_cv_cxxflags_gcc_option_$1])dnl |
| AC_CACHE_CHECK([m4_ifval($2,$2,FLAGS) for gcc m4_ifval($1,$1,-option)], |
| VAR,[VAR="no, unknown" |
| AC_LANG_SAVE |
| AC_LANG_CPLUSPLUS |
| ac_save_[]FLAGS="$[]FLAGS" |
| for ac_arg dnl |
| in "-pedantic -Werror % m4_ifval($1,$1,-option)" dnl GCC |
| "-pedantic % m4_ifval($1,$1,-option) %% no, obsolete" dnl new GCC |
| # |
| do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` |
| AC_TRY_COMPILE([],[return 0;], |
| [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) |
| done |
| FLAGS="$ac_save_[]FLAGS" |
| AC_LANG_RESTORE |
| ]) |
| case ".$VAR" in |
| .ok|.ok,*) m4_ifvaln($3,$3) ;; |
| .|.no|.no,*) m4_ifvaln($4,$4) ;; |
| *) m4_ifvaln($3,$3,[ |
| if echo " $[]m4_ifval($2,$2,FLAGS) " | grep " $VAR " 2>&1 >/dev/null |
| then AC_RUN_LOG([: m4_ifval($2,$2,FLAGS) does contain $VAR]) |
| else AC_RUN_LOG([: m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR"]) |
| m4_ifval($2,$2,FLAGS)="$m4_ifval($2,$2,FLAGS) $VAR" |
| fi ]) ;; |
| esac |
| AS_VAR_POPDEF([VAR])dnl |
| AS_VAR_POPDEF([FLAGS])dnl |
| ]) |
| |
| AC_DEFUN([AX_CFLAGS_GCC_OPTION],[ifelse(m4_bregexp([$2],[-]),-1, |
| [AX_CFLAGS_GCC_OPTION_NEW($@)],[AX_CFLAGS_GCC_OPTION_OLD($@)])]) |
| |
| AC_DEFUN([AX_CXXFLAGS_GCC_OPTION],[ifelse(m4_bregexp([$2],[-]),-1, |
| [AX_CXXFLAGS_GCC_OPTION_NEW($@)],[AX_CXXFLAGS_GCC_OPTION_OLD($@)])]) |
