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f29ded4b LC |
1 | # warnings.m4 serial 2 |
2 | dnl Copyright (C) 2008 Free Software Foundation, Inc. | |
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 | ||
9 | # gl_AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH]) | |
10 | # ---------------------------------------------------- | |
11 | # Provide the functionality of AS_VAR_IF if Autoconf does not have it. | |
12 | m4_ifdef([AS_VAR_IF], | |
13 | [m4_copy([AS_VAR_IF], [gl_AS_VAR_IF])], | |
14 | [m4_define([gl_AS_VAR_IF], | |
15 | [AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])]) | |
16 | ||
17 | # gl_AS_VAR_APPEND(VAR, VALUE) | |
18 | # ---------------------------- | |
19 | # Provide the functionality of AS_VAR_APPEND if Autoconf does not have it. | |
20 | m4_ifdef([AS_VAR_APPEND], | |
21 | [m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])], | |
22 | [m4_define([gl_AS_VAR_APPEND], | |
23 | [AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])]) | |
24 | ||
25 | # gl_WARN_ADD(PARAMETER, [VARIABLE = WARN_CFLAGS]) | |
26 | # ------------------------------------------------ | |
27 | # Adds parameter to WARN_CFLAGS if the compiler supports it. For example, | |
28 | # gl_WARN_ADD([-Wparentheses]). | |
29 | AC_DEFUN([gl_WARN_ADD], | |
30 | [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_$1])dnl | |
31 | AC_CACHE_CHECK([whether compiler handles $1], [gl_Warn], [ | |
32 | save_CPPFLAGS="$CPPFLAGS" | |
33 | CPPFLAGS="${CPPFLAGS} $1" | |
34 | AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])], | |
35 | [AS_VAR_SET([gl_Warn], [yes])], | |
36 | [AS_VAR_SET([gl_Warn], [no])]) | |
37 | CPPFLAGS="$save_CPPFLAGS" | |
38 | ]) | |
39 | AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl | |
40 | gl_AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])]) | |
41 | AS_VAR_POPDEF([gl_Flags])dnl | |
42 | AS_VAR_POPDEF([gl_Warn])dnl | |
43 | m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl | |
44 | ]) |