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author | James Peach <jpeach@samba.org> | 2005-08-23 00:16:13 +0000 |
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committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 13:34:22 -0500 |
commit | eacdca99df3ff2dff90c6dd16cec86cb0c905768 (patch) | |
tree | 84e98e3efd6806537e975b62bfbdb9896b628ebb /source4/build/m4/ax_cflags_gcc_option.m4 | |
parent | b19ad7281eb0323a38bb2d0e2de3554caf88d3f8 (diff) | |
download | samba-eacdca99df3ff2dff90c6dd16cec86cb0c905768.tar.gz samba-eacdca99df3ff2dff90c6dd16cec86cb0c905768.tar.bz2 samba-eacdca99df3ff2dff90c6dd16cec86cb0c905768.zip |
r9494: Add ac-archive macro for checking GCC options. Use this to add to
developer CFLAGS to handle different versions of GCC.
(This used to be commit 850d073c8569c758a6998021ee033793425316c9)
Diffstat (limited to 'source4/build/m4/ax_cflags_gcc_option.m4')
-rw-r--r-- | source4/build/m4/ax_cflags_gcc_option.m4 | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/source4/build/m4/ax_cflags_gcc_option.m4 b/source4/build/m4/ax_cflags_gcc_option.m4 new file mode 100644 index 0000000000..fedaa67cba --- /dev/null +++ b/source4/build/m4/ax_cflags_gcc_option.m4 @@ -0,0 +1,184 @@ +dnl @synopsis AX_CFLAGS_GCC_OPTION (optionflag [,[shellvar][,[A][,[NA]]]) +dnl +dnl AX_CFLAGS_GCC_OPTION(-fvomit-frame) would show a message as like +dnl "checking CFLAGS for gcc -fvomit-frame ... yes" and adds +dnl the optionflag to CFLAGS if it is understood. You can override +dnl the shellvar-default of CFLAGS of course. The order of arguments +dnl stems from the explicit macros like AX_CFLAGS_WARN_ALL. +dnl +dnl The cousin AX_CXXFLAGS_GCC_OPTION would check for an option to add +dnl to CXXFLAGS - and it uses the autoconf setup for C++ instead of C +dnl (since it is possible to use different compilers for C and C++). +dnl +dnl The macro is a lot simpler than any special AX_CFLAGS_* macro (or +dnl ac_cxx_rtti.m4 macro) but allows to check for arbitrary options. +dnl However, if you use this macro in a few places, it would be great +dnl if you would make up a new function-macro and submit it to the +dnl ac-archive. +dnl +dnl - $1 option-to-check-for : required ("-option" as non-value) +dnl - $2 shell-variable-to-add-to : CFLAGS (or CXXFLAGS in the other case) +dnl - $3 action-if-found : add value to shellvariable +dnl - $4 action-if-not-found : nothing +dnl +dnl note: in earlier versions, $1-$2 were swapped. We try to detect the +dnl situation and accept a $2=~/-/ as being the old option-to-check-for. +dnl +dnl also: there are other variants that emerged from the original macro +dnl variant which did just test an option to be possibly added. However, +dnl some compilers accept an option silently, or possibly for just +dnl another option that was not intended. Therefore, we have to do a +dnl generic test for a compiler family. For gcc we check "-pedantic" +dnl being accepted which is also understood by compilers who just want +dnl to be compatible with gcc even when not being made from gcc sources. +dnl +dnl see also: +dnl AX_CFLAGS_SUN_OPTION AX_CFLAGS_HPUX_OPTION +dnl AX_CFLAGS_AIX_OPTION AX_CFLAGS_IRIX_OPTION +dnl +dnl @, tested, experimental +dnl @version $Id: ax_cflags_gcc_option.m4,v 1.5 2003/11/29 08:13:25 guidod Exp $ +dnl @author Guido Draheim <guidod@gmx.de> +dnl http://ac-archive.sourceforge.net/C_Support/ax_cflags_gcc_option.m4 +dnl +AC_DEFUN([AX_CFLAGS_GCC_OPTION_OLD], [dnl +AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl +AS_VAR_PUSHDEF([VAR],[ac_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 % m4_ifval($2,$2,-option)" dnl GCC + # +do FLAGS="$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],[ac_cv_cxxflags_gcc_option_$2])dnl +AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for gcc m4_ifval($2,$2,-option)], +VAR,[VAR="no, unknown" + AC_LANG_SAVE + AC_LANG_CXX + ac_save_[]FLAGS="$[]FLAGS" +for ac_arg dnl +in "-pedantic % m4_ifval($2,$2,-option)" dnl GCC + # +do FLAGS="$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],[ac_cv_cflags_gcc_option_$1])dnl +AC_CACHE_CHECK([m4_ifval($2,$2,FLAGS) for gcc m4_ifval($1,$1,-option)], +VAR,[VAR="no, unknown" + AC_LANG_SAVE + AC_LANG_C + ac_save_[]FLAGS="$[]FLAGS" +for ac_arg dnl +in "-pedantic % m4_ifval($1,$1,-option)" dnl GCC + # +do FLAGS="$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],[ac_cv_cxxflags_gcc_option_$1])dnl +AC_CACHE_CHECK([m4_ifval($2,$2,FLAGS) for gcc m4_ifval($1,$1,-option)], +VAR,[VAR="no, unknown" + AC_LANG_SAVE + AC_LANG_CXX + ac_save_[]FLAGS="$[]FLAGS" +for ac_arg dnl +in "-pedantic % m4_ifval($1,$1,-option)" dnl GCC + # +do FLAGS="$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($@)])]) |