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# Check if "struct ucred" is available. If not, try harder with
# _GNU_SOURCE.
#
# Author: Max Kellermann <max@duempel.org>
AC_DEFUN([STRUCT_UCRED],[
AC_MSG_CHECKING([for struct ucred])
AC_CACHE_VAL(mpd_cv_have_struct_ucred, [
AC_TRY_COMPILE([#include <sys/socket.h>],
[struct ucred cred;],
mpd_cv_have_struct_ucred=yes,
mpd_cv_have_struct_ucred=no)
if test x$mpd_cv_have_struct_ucred = xno; then
# glibc 2.8 forces _GNU_SOURCE on us
AC_TRY_COMPILE(
[#define _GNU_SOURCE
#include <sys/socket.h>],
[struct ucred cred;],
mpd_cv_have_struct_ucred=yes,
mpd_cv_have_struct_ucred=no)
if test x$mpd_cv_have_struct_ucred = xyes; then
# :(
MPD_CFLAGS="$MPD_CFLAGS -D_GNU_SOURCE"
fi
fi
])
AC_MSG_RESULT($mpd_cv_have_struct_ucred)
if test x$mpd_cv_have_struct_ucred = xyes; then
AC_DEFINE(HAVE_STRUCT_UCRED, 1, [Define if struct ucred is present from sys/socket.h])
fi
])
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