configure: Disable gstreamer support if headers are not compatible with build environment.

configure

@@ -10527,6 +10527,22 @@ then
 if test "x$ac_cv_header_gst_gstpad_h" = xyes; then :
   ac_fn_c_check_header_mongrel "$LINENO" "gst/app/gstappsink.h" "ac_cv_header_gst_app_gstappsink_h" "$ac_includes_default"
 if test "x$ac_cv_header_gst_app_gstappsink_h" = xyes; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gint64 defined by gst/app/gstappsink.h is indeed 64-bit" >&5
+$as_echo_n "checking whether gint64 defined by gst/app/gstappsink.h is indeed 64-bit... " >&6; }
+              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <gst/app/gstappsink.h>
+int
+main ()
+{
+int a[sizeof(gint64) > 4 ? 1 : -1]
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
                  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for gst_pad_get_caps_reffed in -lgstreamer-0.10" >&5
 $as_echo_n "checking for gst_pad_get_caps_reffed in -lgstreamer-0.10... " >&6; }
 if ${ac_cv_lib_gstreamer_0_10_gst_pad_get_caps_reffed+:} false; then :
@@ -10609,6 +10625,11 @@ fi
 
 fi
 
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 fi
 
 

configure.ac

@@ -1456,10 +1456,15 @@ then
         CPPFLAGS="$CPPFLAGS $ac_gst_incl"
         AC_CHECK_HEADER([gst/gstpad.h],
           [AC_CHECK_HEADER([gst/app/gstappsink.h],
-             [AC_CHECK_LIB(gstreamer-0.10,gst_pad_get_caps_reffed,
+             [AC_MSG_CHECKING([whether gint64 defined by gst/app/gstappsink.h is indeed 64-bit])
+              AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <gst/app/gstappsink.h>]],
+                                                 [[int a[sizeof(gint64) > 4 ? 1 : -1]]])],
+                [AC_MSG_RESULT([yes])
+                 AC_CHECK_LIB(gstreamer-0.10,gst_pad_get_caps_reffed,
                    [AC_CHECK_LIB(gstapp-0.10,gst_app_buffer_new,
                       [AC_SUBST(GSTREAMER_LIBS,"$ac_gst_libs")
-                     AC_SUBST(GSTREAMER_INCL,"$ac_gst_incl")],,[$ac_gst_libs])])])])
+                       AC_SUBST(GSTREAMER_INCL,"$ac_gst_incl")],,[$ac_gst_libs])])],
+                [AC_MSG_RESULT([no])])])])
     fi
     CPPFLAGS="$ac_save_CPPFLAGS"
 fi