159 lines
6.2 KiB
Plaintext
159 lines
6.2 KiB
Plaintext
##### http://autoconf-archive.cryp.to/ax_cflags_warn_all.html
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#
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# SYNOPSIS
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#
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# AX_CFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])]
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#
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# DESCRIPTION
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#
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# Try to find a compiler option that enables most reasonable
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# warnings. This macro is directly derived from VL_PROG_CC_WARNINGS
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# which is split up into two AX_CFLAGS_WARN_ALL and
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# AX_CFLAGS_WARN_ALL_ANSI
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#
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# For the GNU CC compiler it will be -Wall (and -ansi -pedantic) The
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# result is added to the shellvar being CFLAGS by default.
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#
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# Currently this macro knows about GCC, Solaris C compiler, Digital
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# Unix C compiler, C for AIX Compiler, HP-UX C compiler, IRIX C
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# compiler, NEC SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos
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# 10.0.0.8) C compiler.
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#
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# - $1 shell-variable-to-add-to : CFLAGS
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# - $2 add-value-if-not-found : nothing
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# - $3 action-if-found : add value to shellvariable
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# - $4 action-if-not-found : nothing
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#
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# LAST MODIFICATION
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#
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# 2006-12-12
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#
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# COPYLEFT
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#
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# Copyright (c) 2006 Guido U. Draheim <guidod@gmx.de>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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#
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# As a special exception, the respective Autoconf Macro's copyright
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# owner gives unlimited permission to copy, distribute and modify the
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# configure scripts that are the output of Autoconf when processing
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# the Macro. You need not follow the terms of the GNU General Public
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# License when using or distributing such scripts, even though
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# portions of the text of the Macro appear in them. The GNU General
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# Public License (GPL) does govern all other use of the material that
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# constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the
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# Autoconf Macro released by the Autoconf Macro Archive. When you
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# make and distribute a modified version of the Autoconf Macro, you
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# may extend this special exception to the GPL to apply to your
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# modified version as well.
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AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl
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AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
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AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_warn_all])dnl
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AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
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VAR,[VAR="no, unknown"
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AC_LANG_SAVE
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AC_LANG_C
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ac_save_[]FLAGS="$[]FLAGS"
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for ac_arg dnl
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in "-pedantic % -Wall" dnl GCC
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"-xstrconst % -v" dnl Solaris C
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"-std1 % -verbose -w0 -warnprotos" dnl Digital Unix
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"-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
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"-ansi -ansiE % -fullwarn" dnl IRIX
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"+ESlit % +w1" dnl HP-UX C
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"-Xc % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10)
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"-h conform % -h msglevel 2" dnl Cray C (Unicos)
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#
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do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
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AC_TRY_COMPILE([],[return 0;],
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[VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
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done
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FLAGS="$ac_save_[]FLAGS"
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AC_LANG_RESTORE
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])
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case ".$VAR" in
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.ok|.ok,*) m4_ifvaln($3,$3) ;;
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.|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
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AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
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m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
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*) m4_ifvaln($3,$3,[
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if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
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then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
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else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
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m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
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fi ]) ;;
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esac
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AS_VAR_POPDEF([VAR])dnl
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AS_VAR_POPDEF([FLAGS])dnl
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])
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dnl the only difference - the LANG selection... and the default FLAGS
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AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl
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AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
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AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_warn_all])dnl
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AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
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VAR,[VAR="no, unknown"
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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ac_save_[]FLAGS="$[]FLAGS"
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for ac_arg dnl
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in "-pedantic % -Wall" dnl GCC
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"-xstrconst % -v" dnl Solaris C
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"-std1 % -verbose -w0 -warnprotos" dnl Digital Unix
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"-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
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"-ansi -ansiE % -fullwarn" dnl IRIX
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"+ESlit % +w1" dnl HP-UX C
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"-Xc % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10)
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"-h conform % -h msglevel 2" dnl Cray C (Unicos)
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#
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do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
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AC_TRY_COMPILE([],[return 0;],
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[VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
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done
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FLAGS="$ac_save_[]FLAGS"
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AC_LANG_RESTORE
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])
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case ".$VAR" in
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.ok|.ok,*) m4_ifvaln($3,$3) ;;
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.|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
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AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
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m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
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*) m4_ifvaln($3,$3,[
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if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
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then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
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else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
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m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
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fi ]) ;;
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esac
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AS_VAR_POPDEF([VAR])dnl
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AS_VAR_POPDEF([FLAGS])dnl
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])
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dnl implementation tactics:
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dnl the for-argument contains a list of options. The first part of
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dnl these does only exist to detect the compiler - usually it is
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dnl a global option to enable -ansi or -extrawarnings. All other
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dnl compilers will fail about it. That was needed since a lot of
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dnl compilers will give false positives for some option-syntax
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dnl like -Woption or -Xoption as they think of it is a pass-through
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dnl to later compile stages or something. The "%" is used as a
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dnl delimimiter. A non-option comment can be given after "%%" marks
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dnl which will be shown but not added to the respective C/CXXFLAGS.
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