source: m4/ax_cflags_warn_all.m4 @ ebc6f77

Last change on this file since ebc6f77 was e9b4a2c, checked in by Anders Kaseorg <andersk@mit.edu>, 9 years ago
Update autoconf macros from autoconf-archive 2012.09.08 cfea4ee ax_append_flag: Split file into one macro per file 5f9f40b Use one implementation for C/C++ in ax_cflags_*.m4 48a6e62 ax_cflags_*: Use AX_APPEND_FLAG macro dc74e8f Updated serial numbers, and re-formatted the macro to be consistent with the rest of the archive. 7d5e931 AC_REQUIRE AX_APPEND_FLAG when appropriate. Signed-off-by: Anders Kaseorg <andersk@mit.edu>
  • Property mode set to 100644
File size: 4.9 KB
Line 
1# ===========================================================================
2#    http://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 <http://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 14
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
87AC_REQUIRE([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])
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