# =========================================================================== # https://www.gnu.org/software/autoconf-archive/ax_cflags_warn_all.html # =========================================================================== # # SYNOPSIS # # AX_CFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])] # AX_CXXFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])] # AX_FCFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])] # # DESCRIPTION # # Try to find a compiler option that enables most reasonable warnings. # # For the GNU compiler it will be -Wall (and -ansi -pedantic) The result # is added to the shellvar being CFLAGS, CXXFLAGS, or FCFLAGS by default. # # Currently this macro knows about the GCC, Solaris, Digital Unix, AIX, # HP-UX, IRIX, NEC SX-5 (Super-UX 10), Cray J90 (Unicos 10.0.0.8), and # Intel compilers. For a given compiler, the Fortran flags are much more # experimental than their C equivalents. # # - $1 shell-variable-to-add-to : CFLAGS, CXXFLAGS, or FCFLAGS # - $2 add-value-if-not-found : nothing # - $3 action-if-found : add value to shellvariable # - $4 action-if-not-found : nothing # # NOTE: These macros depend on AX_APPEND_FLAG. # # LICENSE # # Copyright (c) 2008 Guido U. Draheim # Copyright (c) 2010 Rhys Ulerich # # 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 3 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 . # # As a special exception, the respective Autoconf Macro's copyright owner # gives unlimited permission to copy, distribute and modify the configure # scripts that are the output of Autoconf when processing the Macro. You # need not follow the terms of the GNU General Public License when using # or distributing such scripts, even though portions of the text of the # Macro appear in them. The GNU General Public License (GPL) does govern # all other use of the material that constitutes the Autoconf Macro. # # This special exception to the GPL applies to versions of the Autoconf # Macro released by the Autoconf Archive. When you make and distribute a # modified version of the Autoconf Macro, you may extend this special # exception to the GPL to apply to your modified version as well. #serial 16 AC_DEFUN([AX_FLAGS_WARN_ALL],[dnl AS_VAR_PUSHDEF([FLAGS],[_AC_LANG_PREFIX[]FLAGS])dnl AS_VAR_PUSHDEF([VAR],[ac_cv_[]_AC_LANG_ABBREV[]flags_warn_all])dnl AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings], VAR,[VAR="no, unknown" ac_save_[]FLAGS="$[]FLAGS" for ac_arg dnl in "-warn all % -warn all" dnl Intel "-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_COMPILE_IFELSE([AC_LANG_PROGRAM], [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) done FLAGS="$ac_save_[]FLAGS" ]) AS_VAR_POPDEF([FLAGS])dnl AX_REQUIRE_DEFINED([AX_APPEND_FLAG]) case ".$VAR" in .ok|.ok,*) m4_ifvaln($3,$3) ;; .|.no|.no,*) m4_default($4,[m4_ifval($2,[AX_APPEND_FLAG([$2], [$1])])]) ;; *) m4_default($3,[AX_APPEND_FLAG([$VAR], [$1])]) ;; esac AS_VAR_POPDEF([VAR])dnl ])dnl AX_FLAGS_WARN_ALL 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 dnl which will be shown but not added to the respective C/CXXFLAGS. AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl AC_LANG_PUSH([C]) AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) AC_LANG_POP([C]) ]) AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl AC_LANG_PUSH([C++]) AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) AC_LANG_POP([C++]) ]) AC_DEFUN([AX_FCFLAGS_WARN_ALL],[dnl AC_LANG_PUSH([Fortran]) AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) AC_LANG_POP([Fortran]) ])