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 | |
---|
58 | AC_DEFUN([AX_CFLAGS_WARN_ALL],[dnl |
---|
59 | AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl |
---|
60 | AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_warn_all])dnl |
---|
61 | AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings], |
---|
62 | VAR,[VAR="no, unknown" |
---|
63 | AC_LANG_SAVE |
---|
64 | AC_LANG_C |
---|
65 | ac_save_[]FLAGS="$[]FLAGS" |
---|
66 | for ac_arg dnl |
---|
67 | in "-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 | # |
---|
76 | do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` |
---|
77 | AC_TRY_COMPILE([],[return 0;], |
---|
78 | [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) |
---|
79 | done |
---|
80 | FLAGS="$ac_save_[]FLAGS" |
---|
81 | AC_LANG_RESTORE |
---|
82 | ]) |
---|
83 | case ".$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 ]) ;; |
---|
94 | esac |
---|
95 | AS_VAR_POPDEF([VAR])dnl |
---|
96 | AS_VAR_POPDEF([FLAGS])dnl |
---|
97 | ]) |
---|
98 | |
---|
99 | dnl the only difference - the LANG selection... and the default FLAGS |
---|
100 | |
---|
101 | AC_DEFUN([AX_CXXFLAGS_WARN_ALL],[dnl |
---|
102 | AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl |
---|
103 | AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_warn_all])dnl |
---|
104 | AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for maximum warnings], |
---|
105 | VAR,[VAR="no, unknown" |
---|
106 | AC_LANG_SAVE |
---|
107 | AC_LANG_CPLUSPLUS |
---|
108 | ac_save_[]FLAGS="$[]FLAGS" |
---|
109 | for ac_arg dnl |
---|
110 | in "-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 | # |
---|
119 | do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` |
---|
120 | AC_TRY_COMPILE([],[return 0;], |
---|
121 | [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) |
---|
122 | done |
---|
123 | FLAGS="$ac_save_[]FLAGS" |
---|
124 | AC_LANG_RESTORE |
---|
125 | ]) |
---|
126 | case ".$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 ]) ;; |
---|
137 | esac |
---|
138 | AS_VAR_POPDEF([VAR])dnl |
---|
139 | AS_VAR_POPDEF([FLAGS])dnl |
---|
140 | ]) |
---|
141 | |
---|
142 | dnl implementation tactics: |
---|
143 | dnl the for-argument contains a list of options. The first part of |
---|
144 | dnl these does only exist to detect the compiler - usually it is |
---|
145 | dnl a global option to enable -ansi or -extrawarnings. All other |
---|
146 | dnl compilers will fail about it. That was needed since a lot of |
---|
147 | dnl compilers will give false positives for some option-syntax |
---|
148 | dnl like -Woption or -Xoption as they think of it is a pass-through |
---|
149 | dnl to later compile stages or something. The "%" is used as a |
---|
150 | dnl delimimiter. A non-option comment can be given after "%%" marks |
---|
151 | dnl which will be shown but not added to the respective C/CXXFLAGS. |
---|