1# =========================================================================== 2# https://www.gnu.org/software/autoconf-archive/ax_cflags_warn_all.html 3# =========================================================================== 4# 5# SYNOPSIS 6# 7# AX_CFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])] 8# AX_CXXFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])] 9# AX_FCFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])] 10# 11# DESCRIPTION 12# 13# Try to find a compiler option that enables most reasonable warnings. 14# 15# For the GNU compiler it will be -Wall (and -ansi -pedantic) The result 16# is added to the shellvar being CFLAGS, CXXFLAGS, or FCFLAGS by default. 17# 18# Currently this macro knows about the GCC, Solaris, Digital Unix, AIX, 19# HP-UX, IRIX, NEC SX-5 (Super-UX 10), Cray J90 (Unicos 10.0.0.8), and 20# Intel compilers. For a given compiler, the Fortran flags are much more 21# experimental than their C equivalents. 22# 23# - $1 shell-variable-to-add-to : CFLAGS, CXXFLAGS, or FCFLAGS 24# - $2 add-value-if-not-found : nothing 25# - $3 action-if-found : add value to shellvariable 26# - $4 action-if-not-found : nothing 27# 28# NOTE: These macros depend on AX_APPEND_FLAG. 29# 30# LICENSE 31# 32# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> 33# Copyright (c) 2010 Rhys Ulerich <rhys.ulerich@gmail.com> 34# 35# This program is free software; you can redistribute it and/or modify it 36# under the terms of the GNU General Public License as published by the 37# Free Software Foundation; either version 3 of the License, or (at your 38# option) any later version. 39# 40# This program is distributed in the hope that it will be useful, but 41# WITHOUT ANY WARRANTY; without even the implied warranty of 42# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 43# Public License for more details. 44# 45# You should have received a copy of the GNU General Public License along 46# with this program. If not, see <https://www.gnu.org/licenses/>. 47# 48# As a special exception, the respective Autoconf Macro's copyright owner 49# gives unlimited permission to copy, distribute and modify the configure 50# scripts that are the output of Autoconf when processing the Macro. You 51# need not follow the terms of the GNU General Public License when using 52# or distributing such scripts, even though portions of the text of the 53# Macro appear in them. The GNU General Public License (GPL) does govern 54# all other use of the material that constitutes the Autoconf Macro. 55# 56# This special exception to the GPL applies to versions of the Autoconf 57# Macro released by the Autoconf Archive. When you make and distribute a 58# modified version of the Autoconf Macro, you may extend this special 59# exception to the GPL to apply to your modified version as well. 60 61#serial 16 62 63AC_DEFUN([AX_FLAGS_WARN_ALL],[dnl 64AS_VAR_PUSHDEF([FLAGS],[_AC_LANG_PREFIX[]FLAGS])dnl 65AS_VAR_PUSHDEF([VAR],[ac_cv_[]_AC_LANG_ABBREV[]flags_warn_all])dnl 66AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings], 67VAR,[VAR="no, unknown" 68ac_save_[]FLAGS="$[]FLAGS" 69for ac_arg dnl 70in "-warn all % -warn all" dnl Intel 71 "-pedantic % -Wall" dnl GCC 72 "-xstrconst % -v" dnl Solaris C 73 "-std1 % -verbose -w0 -warnprotos" dnl Digital Unix 74 "-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX 75 "-ansi -ansiE % -fullwarn" dnl IRIX 76 "+ESlit % +w1" dnl HP-UX C 77 "-Xc % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10) 78 "-h conform % -h msglevel 2" dnl Cray C (Unicos) 79 # 80do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` 81 AC_COMPILE_IFELSE([AC_LANG_PROGRAM], 82 [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) 83done 84FLAGS="$ac_save_[]FLAGS" 85]) 86AS_VAR_POPDEF([FLAGS])dnl 87AX_REQUIRE_DEFINED([AX_APPEND_FLAG]) 88case ".$VAR" in 89 .ok|.ok,*) m4_ifvaln($3,$3) ;; 90 .|.no|.no,*) m4_default($4,[m4_ifval($2,[AX_APPEND_FLAG([$2], [$1])])]) ;; 91 *) m4_default($3,[AX_APPEND_FLAG([$VAR], [$1])]) ;; 92esac 93AS_VAR_POPDEF([VAR])dnl 94])dnl AX_FLAGS_WARN_ALL 95dnl implementation tactics: 96dnl the for-argument contains a list of options. The first part of 97dnl these does only exist to detect the compiler - usually it is 98dnl a global option to enable -ansi or -extrawarnings. All other 99dnl compilers will fail about it. That was needed since a lot of 100dnl compilers will give false positives for some option-syntax 101dnl like -Woption or -Xoption as they think of it is a pass-through 102dnl to later compile stages or something. The "%" is used as a 103dnl delimiter. A non-option comment can be given after "%%" marks 104dnl which will be shown but not added to the respective C/CXXFLAGS. 105 106AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl 107AC_LANG_PUSH([C]) 108AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) 109AC_LANG_POP([C]) 110]) 111 112AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl 113AC_LANG_PUSH([C++]) 114AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) 115AC_LANG_POP([C++]) 116]) 117 118AC_DEFUN([AX_FCFLAGS_WARN_ALL],[dnl 119AC_LANG_PUSH([Fortran]) 120AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) 121AC_LANG_POP([Fortran]) 122]) 123