Add new object for VoicemailUserEntry
[asterisk/asterisk.git] / autoconf / ast_gcc_attribute.m4
1 # Helper function to check for gcc attributes.
2 # AST_GCC_ATTRIBUTE([attribute name], [attribute syntax], [attribute scope], [makeopts flag])
3
4 AC_DEFUN([AST_GCC_ATTRIBUTE],
5 [
6 AC_MSG_CHECKING(for compiler 'attribute $1' support)
7 saved_CFLAGS="$CFLAGS"
8 CFLAGS="$CFLAGS -Wall -Wno-unused -Werror"
9 m4_ifval([$4],$4=0)
10 ax_cv_have_func_attribute_$1=0
11
12 AC_COMPILE_IFELSE(
13         [AC_LANG_PROGRAM(
14                 m4_ifblank([$2],
15                         [$3 void __attribute__(($1)) *test(void *muffin, ...) {return (void *) 0;}],
16                         [$3 void __attribute__(($2)) *test(void *muffin, ...) ;]))],
17         AC_MSG_RESULT(yes)
18         m4_ifval([$4],$4=1)
19         ax_cv_have_func_attribute_$1=1
20         AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
21         AC_MSG_RESULT(no)
22 )
23
24 m4_ifval([$4],[AC_SUBST($4)])
25 CFLAGS="$saved_CFLAGS"
26 ]
27 )