source: m4/ax_cflags_warn_all.m4 @ 5b197f7

release-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since 5b197f7 was 8073852, checked in by Anders Kaseorg <andersk@mit.edu>, 12 years ago
Use an aclocal macro directory m4/, and add the macros we use. Signed-off-by: Anders Kaseorg <andersk@mit.edu>
  • Property mode set to 100644
File size: 6.3 KB
Line 
1# ===========================================================================
2#           http://autoconf-archive.cryp.to/ax_cflags_warn_all.html
3# ===========================================================================
4#
5# SYNOPSIS
6#
7#   AX_CFLAGS_WARN_ALL [(shellvar [,default, [A/NA]])]
8#
9# DESCRIPTION
10#
11#   Try to find a compiler option that enables most reasonable warnings.
12#   This macro is directly derived from VL_PROG_CC_WARNINGS which is split
13#   up into two AX_CFLAGS_WARN_ALL and AX_CFLAGS_WARN_ALL_ANSI
14#
15#   For the GNU CC compiler it will be -Wall (and -ansi -pedantic) The
16#   result is added to the shellvar being CFLAGS by default.
17#
18#   Currently this macro knows about GCC, Solaris C compiler, Digital Unix C
19#   compiler, C for AIX Compiler, HP-UX C compiler, IRIX C compiler, NEC
20#   SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos 10.0.0.8) C
21#   compiler.
22#
23#    - $1 shell-variable-to-add-to : CFLAGS
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# LICENSE
29#
30#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
31#
32#   This program is free software; you can redistribute it and/or modify it
33#   under the terms of the GNU General Public License as published by the
34#   Free Software Foundation; either version 2 of the License, or (at your
35#   option) any later version.
36#
37#   This program is distributed in the hope that it will be useful, but
38#   WITHOUT ANY WARRANTY; without even the implied warranty of
39#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
40#   Public License for more details.
41#
42#   You should have received a copy of the GNU General Public License along
43#   with this program. If not, see <http://www.gnu.org/licenses/>.
44#
45#   As a special exception, the respective Autoconf Macro's copyright owner
46#   gives unlimited permission to copy, distribute and modify the configure
47#   scripts that are the output of Autoconf when processing the Macro. You
48#   need not follow the terms of the GNU General Public License when using
49#   or distributing such scripts, even though portions of the text of the
50#   Macro appear in them. The GNU General Public License (GPL) does govern
51#   all other use of the material that constitutes the Autoconf Macro.
52#
53#   This special exception to the GPL applies to versions of the Autoconf
54#   Macro released by the Autoconf Archive. When you make and distribute a
55#   modified version of the Autoconf Macro, you may extend this special
56#   exception to the GPL to apply to your modified version as well.
57
58AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl
59AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
60AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_warn_all])dnl
61AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
62VAR,[VAR="no, unknown"
63 AC_LANG_SAVE
64 AC_LANG_C
65 ac_save_[]FLAGS="$[]FLAGS"
66for ac_arg dnl
67in "-pedantic  % -Wall"       dnl   GCC
68   "-xstrconst % -v"          dnl Solaris C
69   "-std1      % -verbose -w0 -warnprotos" dnl Digital Unix
70   "-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
71   "-ansi -ansiE % -fullwarn" dnl IRIX
72   "+ESlit     % +w1"         dnl HP-UX C
73   "-Xc        % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10)
74   "-h conform % -h msglevel 2" dnl Cray C (Unicos)
75   #
76do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
77   AC_TRY_COMPILE([],[return 0;],
78   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
79done
80 FLAGS="$ac_save_[]FLAGS"
81 AC_LANG_RESTORE
82])
83case ".$VAR" in
84     .ok|.ok,*) m4_ifvaln($3,$3) ;;
85   .|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
86        AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
87                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
88   *) m4_ifvaln($3,$3,[
89   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
90   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
91   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
92                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
93   fi ]) ;;
94esac
95AS_VAR_POPDEF([VAR])dnl
96AS_VAR_POPDEF([FLAGS])dnl
97])
98
99dnl the only difference - the LANG selection... and the default FLAGS
100
101AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl
102AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
103AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_warn_all])dnl
104AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings],
105VAR,[VAR="no, unknown"
106 AC_LANG_SAVE
107 AC_LANG_CPLUSPLUS
108 ac_save_[]FLAGS="$[]FLAGS"
109for ac_arg dnl
110in "-pedantic  % -Wall"       dnl   GCC
111   "-xstrconst % -v"          dnl Solaris C
112   "-std1      % -verbose -w0 -warnprotos" dnl Digital Unix
113   "-qlanglvl=ansi % -qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" dnl AIX
114   "-ansi -ansiE % -fullwarn" dnl IRIX
115   "+ESlit     % +w1"         dnl HP-UX C
116   "-Xc        % -pvctl[,]fullmsg" dnl NEC SX-5 (Super-UX 10)
117   "-h conform % -h msglevel 2" dnl Cray C (Unicos)
118   #
119do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
120   AC_TRY_COMPILE([],[return 0;],
121   [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
122done
123 FLAGS="$ac_save_[]FLAGS"
124 AC_LANG_RESTORE
125])
126case ".$VAR" in
127     .ok|.ok,*) m4_ifvaln($3,$3) ;;
128   .|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
129        AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
130                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
131   *) m4_ifvaln($3,$3,[
132   if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
133   then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
134   else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
135                      m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
136   fi ]) ;;
137esac
138AS_VAR_POPDEF([VAR])dnl
139AS_VAR_POPDEF([FLAGS])dnl
140])
141
142dnl  implementation tactics:
143dnl   the for-argument contains a list of options. The first part of
144dnl   these does only exist to detect the compiler - usually it is
145dnl   a global option to enable -ansi or -extrawarnings. All other
146dnl   compilers will fail about it. That was needed since a lot of
147dnl   compilers will give false positives for some option-syntax
148dnl   like -Woption or -Xoption as they think of it is a pass-through
149dnl   to later compile stages or something. The "%" is used as a
150dnl   delimimiter. A non-option comment can be given after "%%" marks
151dnl   which will be shown but not added to the respective C/CXXFLAGS.
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