[cairo] [PATCH 2/4] configure.ac: Explicitly enable subject-objects for automake 1.11

[Bryce W. Harrington]

This fixes this build issue on Ubuntu 14.04 with gcc 4.8:

perf/Makefile.sources:7: warning: source file '../src/cairo-time.c' is in a subdirectory,
perf/Makefile.sources:7: but option 'subdir-objects' is disabled
perf/Makefile.am:3:   'perf/Makefile.sources' included from here
automake: warning: possible forward-incompatibility.
automake: At least a source file is in a subdirectory, but the 'subdir-objects'
automake: automake option hasn't been enabled.  For now, the corresponding output
automake: object file(s) will be placed in the top-level directory.  However,
automake: this behaviour will change in future Automake versions: they will
automake: unconditionally cause object files to be placed in the same subdirectory
automake: of the corresponding sources.
automake: You are advised to start using 'subdir-objects' option throughout your
automake: project, to avoid future incompatibilities.

Signed-off-by: Bryce Harrington <b.harrington at samsung.com>
---
 configure.ac |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 66a8558..fca6fc5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,7 +13,7 @@ AC_CONFIG_HEADERS(config.h)
 
 AC_CHECK_HEADERS([unistd.h sys/ioctl.h])
 
-AM_INIT_AUTOMAKE([1.11 foreign -Wall no-define no-dist-gzip dist-xz])
+AM_INIT_AUTOMAKE([1.11 foreign -Wall no-define no-dist-gzip dist-xz subdir-objects])
 AM_SILENT_RULES([yes])
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) dnl Workaround for Automake 1.11
 
-- 
1.7.9.5