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124 lines
5.1 KiB
124 lines
5.1 KiB
# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_cflags_warn_all.html
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# ===========================================================================
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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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# AX_CXXFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])]
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# AX_FCFLAGS_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 warnings.
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#
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# For the GNU compiler it will be -Wall (and -ansi -pedantic) The result
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# is added to the shellvar being CFLAGS, CXXFLAGS, or FCFLAGS by default.
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#
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# Currently this macro knows about the GCC, Solaris, Digital Unix, AIX,
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# HP-UX, IRIX, NEC SX-5 (Super-UX 10), Cray J90 (Unicos 10.0.0.8), and
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# Intel compilers. For a given compiler, the Fortran flags are much more
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# experimental than their C equivalents.
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#
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# - $1 shell-variable-to-add-to : CFLAGS, CXXFLAGS, or FCFLAGS
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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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# NOTE: These macros depend on AX_APPEND_FLAG.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
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# Copyright (c) 2010 Rhys Ulerich <rhys.ulerich@gmail.com>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 3 of the License, or (at your
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# 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 General
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# 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 along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# As a special exception, the respective Autoconf Macro's copyright owner
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# gives unlimited permission to copy, distribute and modify the configure
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# scripts that are the output of Autoconf when processing the Macro. You
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# need not follow the terms of the GNU General Public License when using
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# or distributing such scripts, even though portions of the text of the
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# Macro appear in them. The GNU General Public License (GPL) does govern
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# all other use of the material that constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the Autoconf
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# Macro released by the Autoconf Archive. When you make and distribute a
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# modified version of the Autoconf Macro, you may extend this special
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# exception to the GPL to apply to your modified version as well.
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#serial 14
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AC_DEFUN([AX_FLAGS_WARN_ALL],[dnl
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AC_REQUIRE([AC_PROG_SED])dnl
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AS_VAR_PUSHDEF([FLAGS],[_AC_LANG_PREFIX[]FLAGS])dnl
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AS_VAR_PUSHDEF([VAR],[ac_cv_[]_AC_LANG_ABBREV[]flags_warn_all])dnl
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AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
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VAR,[AS_VAR_SET([VAR], ["no, unknown"])
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AS_VAR_COPY([ac_save_[]FLAGS], [FLAGS])
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for ac_arg dnl
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in "-warn all % -warn all" dnl Intel
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"-pedantic % -Wall" dnl GCC
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"-xstrconst % -v" dnl Solaris C
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"-std1 % -verbose -w0 -warnprotos" dnl Digital Unix
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"-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
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"-ansi -ansiE % -fullwarn" dnl IRIX
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"+ESlit % +w1" dnl HP-UX C
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"-Xc % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10)
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"-h conform % -h msglevel 2" dnl Cray C (Unicos)
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#
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do AS_VAR_SET([FLAGS],
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["$ac_save_[]FLAGS `AS_ECHO_N([\"$ac_arg\"]) | $SED -e 's,%%.*,,' -e 's,%,,'`"])
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AC_LINK_IFELSE([AC_LANG_PROGRAM],
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[AS_VAR_SET([VAR],
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["`AS_ECHO_N([\"$ac_arg\"]) | $SED -e 's,.*% *,,'`"])
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break])
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done
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AS_VAR_COPY([FLAGS], [ac_save_[]FLAGS])
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])
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AS_VAR_POPDEF([FLAGS])dnl
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AS_CASE([".$VAR"],
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[.ok|.ok,*], [m4_ifvaln($3,$3)],
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[.|.no|.no,*], [m4_default($4,[m4_ifval($2,[AX_APPEND_FLAG([$2], [$1])])])],
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[m4_default($3,[AX_APPEND_FLAG([$VAR], [$1])])])
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AS_VAR_POPDEF([VAR])dnl
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])dnl AX_FLAGS_WARN_ALL
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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 delimiter. 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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AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl
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AC_LANG_PUSH([C])
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AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
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AC_LANG_POP([C])
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])
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AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl
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AC_LANG_PUSH([C++])
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AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
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AC_LANG_POP([C++])
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])
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AC_DEFUN([AX_FCFLAGS_WARN_ALL],[dnl
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AC_LANG_PUSH([Fortran])
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AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
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AC_LANG_POP([Fortran])
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])
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