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Unix configure: add -Wdeclaration-after-statement by default in CFLAG…
…S to issue 'warning: ISO C90 forbids mixed declarations and code' with GCC, which means that compilation will fails with MSVC, so something that *MUST* be fixed
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| 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 delimimiter. A non-option comment can be given after "%%" marks. |