configure: Support symbol visibility when available

Checks whether or not the compiler supports the -fvisibility option. If
so it sets the VISIBILITY_CFLAGS variable which can be added to the per
directory AM_CFLAGS where appropriate.

By default all symbols will be hidden via the VISIBILITY_CFLAGS. The
drm_public macro can be used to mark symbols that should be exported.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
index 826c30d0..65680da9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -69,6 +69,7 @@ libdrm_la_SOURCES =				\
 	xf86drmSL.c				\
 	xf86drmMode.c				\
 	xf86atomic.h				\
+	libdrm.h				\
 	libdrm_lists.h
 
 libdrmincludedir = ${includedir}