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Update to an unreleased version of ax_cflags_warn_all.m4
This version of the AX_CFLAGS_WARN_ALL macro uses a far more robust method of detecting compilers to select appropriate warning flags. It also uses the AX_PREPEND_FLAG macro instead of AX_APPEND_FLAG. This version of ax_cflags_warn_all.m4 (and ax_prepend_flag.m4) has been submitted upstream; see https://savannah.gnu.org/patch/?9673 for details.
This commit is contained in:
John Zaitseff
parent
5caf1ef165
commit
265ed12de8
@ -4,33 +4,54 @@
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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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# AX_CFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])]
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# AX_CXXFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])]
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# AX_FCFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])]
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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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# Specify compiler options that enable most reasonable warnings. For the
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# GNU Compiler Collection (GCC), for example, it will be "-Wall". The
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# result is added to shellvar, one of CFLAGS, CXXFLAGS or FCFLAGS if the
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# first parameter is not specified.
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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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# Each of these macros accepts the following optional arguments:
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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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# - $1 - shellvar
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# shell variable to use (CFLAGS, CXXFLAGS or FCFLAGS if not
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# specified, depending on macro)
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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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# - $2 - default
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# value to use for flags if compiler vendor cannot be determined (by
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# default, "")
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#
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# NOTE: These macros depend on AX_APPEND_FLAG.
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# - $3 - action-if-found
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# action to take if the compiler vendor has been successfully
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# determined (by default, add the appropriate compiler flags to
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# shellvar)
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#
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# - $4 - action-if-not-found
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# action to take if the compiler vendor has not been determined or
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# is unknown (by default, add the default flags, or "" if not
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# specified, to shellvar)
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#
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# These macros use AX_COMPILER_VENDOR to determine which flags should be
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# returned for a given compiler. Not all compilers currently have flags
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# defined for them; patches are welcome. If need be, compiler flags may
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# be made language-dependent: use a construct like the following:
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#
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# [vendor_name], [m4_if(_AC_LANG_PREFIX,[C], VAR="--relevant-c-flags",dnl
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# m4_if(_AC_LANG_PREFIX,[CXX], VAR="--relevant-c++-flags",dnl
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# m4_if(_AC_LANG_PREFIX,[FC], VAR="--relevant-fortran-flags",dnl
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# VAR="$2"; FOUND="no")))],
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#
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# Note: These macros also depend on AX_PREPEND_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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# Copyright (c) 2018 John Zaitseff <J.Zaitseff@zap.org.au>
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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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@ -58,65 +79,79 @@
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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 16
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#serial 17
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AC_DEFUN([AX_FLAGS_WARN_ALL],[dnl
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AS_VAR_PUSHDEF([FLAGS],[_AC_LANG_PREFIX[]FLAGS])dnl
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AC_DEFUN([AX_FLAGS_WARN_ALL], [
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AX_REQUIRE_DEFINED([AX_PREPEND_FLAG])dnl
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AC_REQUIRE([AX_COMPILER_VENDOR])dnl
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AS_VAR_PUSHDEF([FLAGS], [m4_default($1,_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,$1,FLAGS) for maximum warnings],
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VAR,[VAR="no, unknown"
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ac_save_[]FLAGS="$[]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 FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM],
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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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])
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AS_VAR_POPDEF([FLAGS])dnl
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AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
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case ".$VAR" in
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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], [$1])]) ;;
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esac
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AS_VAR_PUSHDEF([FOUND], [ac_save_[]_AC_LANG_ABBREV[]flags_warn_all_found])dnl
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AC_CACHE_CHECK([FLAGS for most reasonable warnings], VAR, [
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FOUND="yes"
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dnl Cases are listed in the order found in ax_compiler_vendor.m4
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AS_CASE("$ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor",
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[intel], [VAR="-w2"],
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[ibm], [VAR="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd"],
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[pathscale], [VAR=""],
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[clang], [VAR="-Wall"],
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[cray], [VAR="-h msglevel 2"],
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[fujitsu], [VAR=""],
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[sdcc], [VAR=""],
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[sx], [VAR="-pvctl[,]fullmsg"],
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[portland], [VAR=""],
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[gnu], [VAR="-Wall"],
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[sun], [VAR="-v"],
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[hp], [VAR="+w1"],
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[dec], [VAR="-verbose -w0 -warnprotos"],
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[borland], [VAR=""],
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[comeau], [VAR=""],
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[kai], [VAR=""],
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[lcc], [VAR=""],
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[sgi], [VAR="-fullwarn"],
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[microsoft], [VAR=""],
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[metrowerks], [VAR=""],
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[watcom], [VAR=""],
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[tcc], [VAR=""],
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[unknown], [
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VAR="$2"
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FOUND="no"
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],
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[
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AC_MSG_WARN([Unknown compiler vendor returned by [AX_COMPILER_VENDOR]])
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VAR="$2"
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FOUND="no"
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]
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)
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AS_IF([test "x$FOUND" = "xyes"], [dnl
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m4_default($3, [AX_PREPEND_FLAG([$VAR], [FLAGS])])
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], [dnl
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m4_default($4, [m4_ifval($2, [AX_PREPEND_FLAG([$VAR], [FLAGS])], [true])])
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])dnl
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])dnl
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AS_VAR_POPDEF([FOUND])dnl
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AS_VAR_POPDEF([VAR])dnl
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AS_VAR_POPDEF([FLAGS])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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])dnl
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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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])dnl
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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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])dnl
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@ -1,36 +1,37 @@
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# ===========================================================================
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# https://www.gnu.org/software/autoconf-archive/ax_append_flag.html
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# https://www.gnu.org/software/autoconf-archive/ax_prepend_flag.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE])
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# AX_PREPEND_FLAG(FLAG, [FLAGS-VARIABLE])
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#
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# DESCRIPTION
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#
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# FLAG is appended to the FLAGS-VARIABLE shell variable, with a space
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# added in between.
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# FLAG is added to the front of the FLAGS-VARIABLE shell variable, with a
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# space added in between.
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#
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# If FLAGS-VARIABLE is not specified, the current language's flags (e.g.
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# CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains
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# FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly
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# FLAG.
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#
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# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION.
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# NOTE: Implementation based 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) 2011 Maarten Bosmans <mkbosmans@gmail.com>
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# Copyright (c) 2018 John Zaitseff <J.Zaitseff@zap.org.au>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 8
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#serial 1
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AC_DEFUN([AX_APPEND_FLAG],
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AC_DEFUN([AX_PREPEND_FLAG],
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[dnl
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AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF
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AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])
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@ -38,7 +39,7 @@ AS_VAR_SET_IF(FLAGS,[
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AS_CASE([" AS_VAR_GET(FLAGS) "],
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[*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])],
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[
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AS_VAR_APPEND(FLAGS,[" $1"])
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FLAGS="$1 $FLAGS"
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AC_RUN_LOG([: FLAGS="$FLAGS"])
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])
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],
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@ -47,4 +48,4 @@ AS_VAR_SET_IF(FLAGS,[
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AC_RUN_LOG([: FLAGS="$FLAGS"])
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])
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AS_VAR_POPDEF([FLAGS])dnl
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])dnl AX_APPEND_FLAG
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])dnl AX_PREPEND_FLAG
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