diff options
| -rw-r--r-- | m4/ax_cflags_warn_all.m4 | 180 |
1 files changed, 108 insertions, 72 deletions
diff --git a/m4/ax_cflags_warn_all.m4 b/m4/ax_cflags_warn_all.m4 index 094577e..9235a18 100644 --- a/m4/ax_cflags_warn_all.m4 +++ b/m4/ax_cflags_warn_all.m4 @@ -4,33 +4,54 @@ # # 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]])] +# AX_CFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])] +# AX_CXXFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])] +# AX_FCFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])] # # DESCRIPTION # -# Try to find a compiler option that enables most reasonable warnings. +# Specify compiler options that enable most reasonable warnings. For the +# GNU Compiler Collection (GCC), for example, it will be "-Wall". The +# result is added to shellvar, one of CFLAGS, CXXFLAGS or FCFLAGS if the +# first parameter is not specified. # -# 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. +# Each of these macros accepts the following optional arguments: # -# 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 - shellvar +# shell variable to use (CFLAGS, CXXFLAGS or FCFLAGS if not +# specified, depending on macro) # -# - $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 +# - $2 - default +# value to use for flags if compiler vendor cannot be determined (by +# default, "") # -# NOTE: These macros depend on AX_APPEND_FLAG. +# - $3 - action-if-found +# action to take if the compiler vendor has been successfully +# determined (by default, add the appropriate compiler flags to +# shellvar) +# +# - $4 - action-if-not-found +# action to take if the compiler vendor has not been determined or +# is unknown (by default, add the default flags, or "" if not +# specified, to shellvar) +# +# These macros use AX_COMPILER_VENDOR to determine which flags should be +# returned for a given compiler. Not all compilers currently have flags +# defined for them; patches are welcome. If need be, compiler flags may +# be made language-dependent: use a construct like the following: +# +# [vendor_name], [m4_if(_AC_LANG_PREFIX,[C], VAR="--relevant-c-flags",dnl +# m4_if(_AC_LANG_PREFIX,[CXX], VAR="--relevant-c++-flags",dnl +# m4_if(_AC_LANG_PREFIX,[FC], VAR="--relevant-fortran-flags",dnl +# VAR="$2"; FOUND="no")))], +# +# Note: These macros also depend on AX_PREPEND_FLAG. # # LICENSE # # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> # Copyright (c) 2010 Rhys Ulerich <rhys.ulerich@gmail.com> +# Copyright (c) 2018 John Zaitseff <J.Zaitseff@zap.org.au> # # 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 @@ -58,65 +79,80 @@ # 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 +#serial 25 + +AC_DEFUN([AX_FLAGS_WARN_ALL], [ + AX_REQUIRE_DEFINED([AX_PREPEND_FLAG])dnl + AC_REQUIRE([AX_COMPILER_VENDOR])dnl + + AS_VAR_PUSHDEF([FLAGS], [m4_default($1,_AC_LANG_PREFIX[]FLAGS)])dnl + AS_VAR_PUSHDEF([VAR], [ac_cv_[]_AC_LANG_ABBREV[]flags_warn_all])dnl + AS_VAR_PUSHDEF([FOUND], [ac_save_[]_AC_LANG_ABBREV[]flags_warn_all_found])dnl + + AC_CACHE_CHECK([FLAGS for most reasonable warnings], VAR, [ + VAR="" + FOUND="yes" + dnl Cases are listed in the order found in ax_compiler_vendor.m4 + AS_CASE("$ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor", + [intel], [VAR="-w2"], + [ibm], [VAR="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd"], + [pathscale], [], + [clang], [VAR="-Wall"], + [cray], [VAR="-h msglevel 2"], + [fujitsu], [], + [sdcc], [], + [sx], [VAR="-pvctl[,]fullmsg"], + [portland], [], + [gnu], [VAR="-Wall"], + [sun], [VAR="-v"], + [hp], [VAR="+w1"], + [dec], [VAR="-verbose -w0 -warnprotos"], + [borland], [], + [comeau], [], + [kai], [], + [lcc], [], + [sgi], [VAR="-fullwarn"], + [microsoft], [], + [metrowerks], [], + [watcom], [], + [tcc], [], + [unknown], [ + VAR="$2" + FOUND="no" + ], + [ + AC_MSG_WARN([Unknown compiler vendor returned by [AX_COMPILER_VENDOR]]) + VAR="$2" + FOUND="no" + ] + ) + + AS_IF([test "x$FOUND" = "xyes"], [dnl + m4_default($3, [AS_IF([test "x$VAR" != "x"], [AX_PREPEND_FLAG([$VAR], [FLAGS])])]) + ], [dnl + m4_default($4, [m4_ifval($2, [AX_PREPEND_FLAG([$VAR], [FLAGS])], [true])]) + ])dnl + ])dnl -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 + AS_VAR_POPDEF([FOUND])dnl + AS_VAR_POPDEF([VAR])dnl + AS_VAR_POPDEF([FLAGS])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_CFLAGS_WARN_ALL], [dnl + AC_LANG_PUSH([C]) + AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) + AC_LANG_POP([C]) +])dnl -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_CXXFLAGS_WARN_ALL], [dnl + AC_LANG_PUSH([C++]) + AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) + AC_LANG_POP([C++]) +])dnl -AC_DEFUN([AX_FCFLAGS_WARN_ALL],[dnl -AC_LANG_PUSH([Fortran]) -AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) -AC_LANG_POP([Fortran]) -]) +AC_DEFUN([AX_FCFLAGS_WARN_ALL], [dnl + AC_LANG_PUSH([Fortran]) + AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) + AC_LANG_POP([Fortran]) +])dnl |