26 lines
669 B
Text
26 lines
669 B
Text
|
dnl Check to find out whether function attributes are supported.
|
||
|
|
dnl If they are not, #define them to be nothing.
|
||
|
|
|
||
|
|
AC_DEFUN([tinc_ATTRIBUTE],
|
||
|
|
[
|
||
|
|
AC_CACHE_CHECK([for working $1 attribute], tinc_cv_attribute_$1,
|
||
|
|
[
|
||
|
|
tempcflags="$CFLAGS"
|
||
|
|
CFLAGS="$CFLAGS -Wall -Werror"
|
||
|
|
AC_COMPILE_IFELSE(
|
||
|
|
[AC_LANG_SOURCE(
|
||
|
|
[void *test(void *x) __attribute__ (($1));
|
||
|
|
void *test(void *x) { return (void *)x; }
|
||
|
|
],
|
||
|
|
)],
|
||
|
|
[tinc_cv_attribute_$1=yes],
|
||
|
|
[tinc_cv_attribute_$1=no]
|
||
|
|
)
|
||
|
|
CFLAGS="$tempcflags"
|
||
|
|
])
|
||
|
|
|
||
|
|
if test ${tinc_cv_attribute_$1} = no; then
|
||
|
|
AC_DEFINE([$1], [], [Defined if the $1 attribute is not supported.])
|
||
|
|
fi
|
||
|
|
])
|