path: root/mk/embedded.mk
diff options
authorMatt Fleming <matt.fleming@intel.com>2012-12-04 21:17:47 +0000
committerMatt Fleming <matt.fleming@intel.com>2012-12-05 22:41:32 +0000
commite4b3ce2dd82ce2da85c37fd3f332ec2eb802b734 (patch)
tree8b98440a37716dab0bd4de8b87a3800e5a40b07b /mk/embedded.mk
parenta79ceb45909434d392aacbb92eb2dfa738479783 (diff)
Symbol export whitelist
Before modules were dynamically loaded the boundary between GPL and non-GPL code was implicit because of the separate link domains for each module. With dynamic modules we need an explicit whitelist of core symbols that non-GPL code can link against at runtime without needing to be re-licensed under the GPL. Mark such symbols with __export, so that it is explicitly clear which symbols in the core can be linked against by non-GPL code. Reduce the visibility of symbols in both the core and ldlinux.c32 with -fvisibility=hidden. __export changes the visibility to 'default'. Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'mk/embedded.mk')
1 files changed, 1 insertions, 0 deletions
diff --git a/mk/embedded.mk b/mk/embedded.mk
index e8f3ae30..c2f4edf3 100644
--- a/mk/embedded.mk
+++ b/mk/embedded.mk
@@ -32,6 +32,7 @@ GCCOPT += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
GCCOPT += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
GCCOPT += $(call gcc_ok,-mpreferred-stack-boundary=2,)
GCCOPT += $(call gcc_ok,-mincoming-stack-boundary=2,)
+GCCOPT += $(call gcc_ok,-fvisibility=hidden)
LIBGCC := $(shell $(CC) $(GCCOPT) --print-libgcc)