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 (a] gmx.de> 33 # Copyright (c) 2010 Rhys Ulerich <rhys.ulerich (a] 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 63 AC_DEFUN([AX_FLAGS_WARN_ALL],[dnl 64 AS_VAR_PUSHDEF([FLAGS],[_AC_LANG_PREFIX[]FLAGS])dnl 65 AS_VAR_PUSHDEF([VAR],[ac_cv_[]_AC_LANG_ABBREV[]flags_warn_all])dnl 66 AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings], 67 VAR,[VAR="no, unknown" 68 ac_save_[]FLAGS="$[]FLAGS" 69 for ac_arg dnl 70 in "-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 # 80 do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` 81 AC_COMPILE_IFELSE([AC_LANG_PROGRAM], 82 [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) 83 done 84 FLAGS="$ac_save_[]FLAGS" 85 ]) 86 AS_VAR_POPDEF([FLAGS])dnl 87 AX_REQUIRE_DEFINED([AX_APPEND_FLAG]) 88 case ".$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])]) ;; 92 esac 93 AS_VAR_POPDEF([VAR])dnl 94 ])dnl AX_FLAGS_WARN_ALL 95 dnl implementation tactics: 96 dnl the for-argument contains a list of options. The first part of 97 dnl these does only exist to detect the compiler - usually it is 98 dnl a global option to enable -ansi or -extrawarnings. All other 99 dnl compilers will fail about it. That was needed since a lot of 100 dnl compilers will give false positives for some option-syntax 101 dnl like -Woption or -Xoption as they think of it is a pass-through 102 dnl to later compile stages or something. The "%" is used as a 103 dnl delimiter. A non-option comment can be given after "%%" marks 104 dnl which will be shown but not added to the respective C/CXXFLAGS. 105 106 AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl 107 AC_LANG_PUSH([C]) 108 AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) 109 AC_LANG_POP([C]) 110 ]) 111 112 AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl 113 AC_LANG_PUSH([C++]) 114 AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) 115 AC_LANG_POP([C++]) 116 ]) 117 118 AC_DEFUN([AX_FCFLAGS_WARN_ALL],[dnl 119 AC_LANG_PUSH([Fortran]) 120 AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4]) 121 AC_LANG_POP([Fortran]) 122 ]) 123
