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Edit File: ax_cflags_warn_all.m4

dnl @synopsis AX_CFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])] dnl dnl Try to find a compiler option that enables most reasonable dnl warnings. This macro is directly derived from VL_PROG_CC_WARNINGS dnl which is split up into two AX_CFLAGS_WARN_ALL and dnl AX_CFLAGS_WARN_ALL_ANSI dnl dnl For the GNU CC compiler it will be -Wall (and -ansi -pedantic) The dnl result is added to the shellvar being CFLAGS by default. dnl dnl Currently this macro knows about GCC, Solaris C compiler, Digital dnl Unix C compiler, C for AIX Compiler, HP-UX C compiler, IRIX C dnl compiler, NEC SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos dnl 10.0.0.8) C compiler. dnl dnl - $1 shell-variable-to-add-to : CFLAGS dnl - $2 add-value-if-not-found : nothing dnl - $3 action-if-found : add value to shellvariable dnl - $4 action-if-not-found : nothing dnl dnl @category C dnl @author Guido Draheim <guidod@gmx.de> dnl @version 2003-01-06 dnl @license GPLWithACException AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_warn_all])dnl AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings], VAR,[VAR="no, unknown" AC_LANG_SAVE AC_LANG(C) ac_save_[]FLAGS="$[]FLAGS" for ac_arg dnl in "-pedantic -Wdeclaration-after-statement % dnl -Wall -Wdeclaration-after-statement" dnl works since GCC version 3 "-pedantic % -Wall" dnl older GCC "-xstrconst % -v" dnl Solaris C "-std1 % -verbose -w0 -warnprotos" dnl Digital Unix "-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX "-ansi -ansiE % -fullwarn" dnl IRIX "+ESlit % +w1" dnl HP-UX C "-Xc % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10) "-h conform % -h msglevel 2" dnl Cray C (Unicos) # 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_ifval($2,[ AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"]) m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;; *) 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_WARN_ALL],[dnl AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_warn_all])dnl AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings], VAR,[VAR="no, unknown" AC_LANG_SAVE AC_LANG(C++) ac_save_[]FLAGS="$[]FLAGS" for ac_arg dnl in "-pedantic % -Wall" dnl GCC "-xstrconst % -v" dnl Solaris C "-std1 % -verbose -w0 -warnprotos" dnl Digital Unix "-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX "-ansi -ansiE % -fullwarn" dnl IRIX "+ESlit % +w1" dnl HP-UX C "-Xc % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10) "-h conform % -h msglevel 2" dnl Cray C (Unicos) # 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_ifval($2,[ AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"]) m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;; *) 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 implementation tactics: dnl the for-argument contains a list of options. The first part of dnl these does only exist to detect the compiler - usually it is dnl a global option to enable -ansi or -extrawarnings. All other dnl compilers will fail about it. That was needed since a lot of dnl compilers will give false positives for some option-syntax dnl like -Woption or -Xoption as they think of it is a pass-through dnl to later compile stages or something. The "%" is used as a dnl delimiter. A non-option comment can be given after "%%" marks.