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005de2e8 | 1 | # warnings.m4 serial 7 |
af07e104 | 2 | dnl Copyright (C) 2008-2013 Free Software Foundation, Inc. |
f29ded4b LC |
3 | dnl This file is free software; the Free Software Foundation |
4 | dnl gives unlimited permission to copy and/or distribute it, | |
5 | dnl with or without modifications, as long as this notice is preserved. | |
6 | ||
7 | dnl From Simon Josefsson | |
8 | ||
f29ded4b LC |
9 | # gl_AS_VAR_APPEND(VAR, VALUE) |
10 | # ---------------------------- | |
11 | # Provide the functionality of AS_VAR_APPEND if Autoconf does not have it. | |
12 | m4_ifdef([AS_VAR_APPEND], | |
13 | [m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])], | |
14 | [m4_define([gl_AS_VAR_APPEND], | |
15 | [AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])]) | |
16 | ||
005de2e8 LC |
17 | |
18 | # gl_COMPILER_OPTION_IF(OPTION, [IF-SUPPORTED], [IF-NOT-SUPPORTED], | |
19 | # [PROGRAM = AC_LANG_PROGRAM()]) | |
20 | # ----------------------------------------------------------------- | |
21 | # Check if the compiler supports OPTION when compiling PROGRAM. | |
22 | # | |
23 | # FIXME: gl_Warn must be used unquoted until we can assume Autoconf | |
24 | # 2.64 or newer. | |
25 | AC_DEFUN([gl_COMPILER_OPTION_IF], | |
26 | [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl | |
27 | AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl | |
28 | AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [ | |
29 | gl_save_compiler_FLAGS="$gl_Flags" | |
30 | gl_AS_VAR_APPEND(m4_defn([gl_Flags]), [" $1"]) | |
31 | AC_COMPILE_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([])])], | |
35428fb6 LC |
32 | [AS_VAR_SET(gl_Warn, [yes])], |
33 | [AS_VAR_SET(gl_Warn, [no])]) | |
005de2e8 | 34 | gl_Flags="$gl_save_compiler_FLAGS" |
f29ded4b | 35 | ]) |
005de2e8 LC |
36 | AS_VAR_IF(gl_Warn, [yes], [$2], [$3]) |
37 | AS_VAR_POPDEF([gl_Flags])dnl | |
f29ded4b | 38 | AS_VAR_POPDEF([gl_Warn])dnl |
f29ded4b | 39 | ]) |
005de2e8 LC |
40 | |
41 | ||
42 | # gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS], | |
43 | # [PROGRAM = AC_LANG_PROGRAM()]) | |
44 | # --------------------------------------------- | |
45 | # Adds parameter to WARN_CFLAGS if the compiler supports it when | |
46 | # compiling PROGRAM. For example, gl_WARN_ADD([-Wparentheses]). | |
47 | # | |
48 | # If VARIABLE is a variable name, AC_SUBST it. | |
49 | AC_DEFUN([gl_WARN_ADD], | |
50 | [gl_COMPILER_OPTION_IF([$1], | |
51 | [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])], | |
52 | [], | |
53 | [$3]) | |
54 | m4_ifval([$2], | |
55 | [AS_LITERAL_IF([$2], [AC_SUBST([$2])])], | |
56 | [AC_SUBST([WARN_CFLAGS])])dnl | |
57 | ]) | |
58 | ||
59 | # Local Variables: | |
60 | # mode: autoconf | |
61 | # End: |