+ Autoconf Macro: ax_cflags_warn_all

+ Description +

+ Try to find a compiler option that enables most reasonable warnings. This + macro is directly derived from VL_PROG_CC_WARNINGS which is split up into + two AX_CFLAGS_WARN_ALL and + AX_CFLAGS_WARN_ALL_ANSI +

+ For the GNU CC compiler it will be -Wall (and -ansi -pedantic) The result + is added to the shellvar being CFLAGS by default. +

+ Currently this macro knows about GCC, Solaris C compiler, Digital Unix C + compiler, C for AIX Compiler, HP-UX C compiler, IRIX C compiler, NEC SX-5 + (Super-UX 10) C compiler, and Cray J90 (Unicos 10.0.0.8) C compiler. +

+ - $1 shell-variable-to-add-to : CFLAGS
+ - $2 add-value-if-not-found : nothing
+ - $3 action-if-found : add value to shellvariable
+ - $4 action-if-not-found : nothing
+

+ Author +

+ Last Modified +

+ Cross References +

+ M4 Source Code +

+AC_DEFUN([AX_CFLAGS_WARN_ALL_ANSI],[dnl
+AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
+AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_warn_all_ansi])dnl
+AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum ansi warnings],
+VAR,[VAR="no, unknown"
+ AC_LANG_SAVE
+ AC_LANG_C
+ ac_save_[]FLAGS="$[]FLAGS"
+# IRIX C compiler:
+#      -use_readonly_const is the default for IRIX C,
+#       puts them into .rodata, but they are copied later.
+#       need to be "-G0 -rdatashared" for strictmode but
+#       I am not sure what effect that has really.         - guidod
+for ac_arg dnl
+in "-pedantic  % -Wall -ansi -pedantic"       dnl   GCC
+   "-xstrconst % -v -Xc"                      dnl Solaris C
+   "-std1      % -verbose -w0 -warnprotos -std1" dnl Digital Unix
+   " % -qlanglvl=ansi -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
+   " % -ansi -ansiE -fullwarn"                dnl IRIX
+   "+ESlit     % +w1 -Aa"                     dnl HP-UX C
+   "-Xc        % -pvctl[,]fullmsg -Xc"        dnl NEC SX-5 (Super-UX 10)
+   "-h conform % -h msglevel 2 -h conform"    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_ANSI],[dnl
+AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
+AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_warn_all_ansi])dnl
+AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum ansi warnings],
+VAR,[VAR="no, unknown"
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ ac_save_[]FLAGS="$[]FLAGS"
+# IRIX C compiler:
+#      -use_readonly_const is the default for IRIX C,
+#       puts them into .rodata, but they are copied later.
+#       need to be "-G0 -rdatashared" for strictmode but
+#       I am not sure what effect that has really.         - guidod
+for ac_arg dnl
+in "-pedantic  % -Wall -ansi -pedantic"       dnl   GCC
+   "-xstrconst % -v -Xc"                      dnl Solaris C
+   "-std1      % -verbose -w0 -warnprotos -std1" dnl Digital Unix
+   " % -qlanglvl=ansi -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
+   " % -ansi -ansiE -fullwarn"                dnl IRIX
+   "+ESlit     % +w1 -Aa"                     dnl HP-UX C
+   "-Xc        % -pvctl[,]fullmsg -Xc"        dnl NEC SX-5 (Super-UX 10)
+   "-h conform % -h msglevel 2 -h conform"    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
+])
+

+ License +

+ 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/>. +

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