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f29ded4b | 1 | # warnings.m4 serial 2 |
61cd9dc9 | 2 | dnl Copyright (C) 2008, 2009, 2010 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 | ||
17 | # gl_WARN_ADD(PARAMETER, [VARIABLE = WARN_CFLAGS]) | |
18 | # ------------------------------------------------ | |
19 | # Adds parameter to WARN_CFLAGS if the compiler supports it. For example, | |
20 | # gl_WARN_ADD([-Wparentheses]). | |
21 | AC_DEFUN([gl_WARN_ADD], | |
22 | [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl | |
23 | AC_CACHE_CHECK([whether compiler handles $1], [gl_Warn], [ | |
24 | save_CPPFLAGS="$CPPFLAGS" | |
25 | CPPFLAGS="${CPPFLAGS} $1" | |
26 | AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])], | |
27 | [AS_VAR_SET([gl_Warn], [yes])], | |
1cd4fffc | 28 | [AS_VAR_SET([gl_Warn], [no])]) |
f29ded4b LC |
29 | CPPFLAGS="$save_CPPFLAGS" |
30 | ]) | |
31 | AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl | |
61cd9dc9 | 32 | AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])]) |
f29ded4b LC |
33 | AS_VAR_POPDEF([gl_Flags])dnl |
34 | AS_VAR_POPDEF([gl_Warn])dnl | |
35 | m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl | |
36 | ]) |