[glib/glib-2-32] make sure configure fails if AC_CHECK_ALIGNOF cannot detect the alignment

[Colin Walters <walters src gnome org>]

commit a7a1a50d6a8eb8387cce1756f3c38abf36f281b4
Author: Michael Olbrich <m olbrich pengutronix de>
Date:   Wed Apr 25 09:46:35 2012 +0200

    make sure configure fails if AC_CHECK_ALIGNOF cannot detect the alignment
    
    When cross-compiling with gcc >= 4.5 AC_CHECK_ALIGNOF fails to detect the
    correct alignment. Without a previous AC_CHECK_TYPE for the same type, the
    alignment is silently set to '0'.
    This makes sure that configure fails and reports the problem.
    
    Signed-off-by: Michael Olbrich <m olbrich pengutronix de>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=674483

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6a90d23..2175867 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3443,10 +3443,13 @@ $ac_cv_sizeof___int64)
   ;;
 esac
 
+AC_CHECK_TYPE([guint32],,,[typedef unsigned $gint32 guint32;])
 AC_CHECK_ALIGNOF([guint32], [AC_INCLUDES_DEFAULT
 typedef unsigned $gint32 guint32;])
+AC_CHECK_TYPE([guint64],,,[typedef unsigned $gint64 guint64;])
 AC_CHECK_ALIGNOF([guint64], [AC_INCLUDES_DEFAULT
 typedef unsigned $gint64 guint64;])
+AC_CHECK_TYPE([unsigned long])
 AC_CHECK_ALIGNOF([unsigned long])
 
 # Check for libdbus1 - Optional - is only used in the GDBus test cases