targets/xa: limit the amount of exported symbols

In the presence of LLVM the final library exports every symbol from
the llvm namespace. Resolve this by using a version script (w/o the
version/name tag).

Considering that there are only ~35 symbols, explicitly list them
to minimize the chances of rogue symbols sneaking in.

v2: Conditionally include the version-script.

Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> (v1)
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

src/gallium/targets/xa/Makefile.am

@@ -66,6 +66,11 @@ libxatracker_la_LDFLAGS = \
 	$(GC_SECTIONS) \
 	$(LD_NO_UNDEFINED)
 
+if HAVE_LD_VERSION_SCRIPT
+libxatracker_la_LDFLAGS += \
+	-Wl,--version-script=$(top_srcdir)/src/gallium/targets/xa/xa.sym
+endif
+
 if HAVE_MESA_LLVM
 libxatracker_la_LIBADD += $(LLVM_LIBS)
 libxatracker_la_LDFLAGS += $(LLVM_LDFLAGS)

src/gallium/targets/xa/xa.sym

@@ -0,0 +1,38 @@
+{
+	global:
+		xa_composite_allocation;
+		xa_composite_check_accelerated;
+		xa_composite_done;
+		xa_composite_prepare;
+		xa_composite_rect;
+		xa_context_create;
+		xa_context_default;
+		xa_context_destroy;
+		xa_context_flush;
+		xa_copy;
+		xa_copy_done;
+		xa_copy_prepare;
+		xa_fence_get;
+		xa_fence_wait;
+		xa_fence_destroy;
+		xa_format_check_supported;
+		xa_solid;
+		xa_solid_done;
+		xa_solid_prepare;
+		xa_surface_create;
+		xa_surface_dma;
+		xa_surface_format;
+		xa_surface_from_handle;
+		xa_surface_handle;
+		xa_surface_map;
+		xa_surface_redefine;
+		xa_surface_ref;
+		xa_surface_unmap;
+		xa_surface_unref;
+		xa_tracker_create;
+		xa_tracker_destroy;
+		xa_tracker_version;
+		xa_yuv_planar_blit;
+	local:
+		*;
+};