cmake.mk: enable -Bsymbolic-functions by default for linking shared libs, slightly improves performance and compression

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 45508

include/cmake.mk

@@ -33,6 +33,7 @@ CMAKE_RANLIB:=$(call cmake_tool,$(TARGET_RANLIB))
 
 CMAKE_FIND_ROOT_PATH:=$(STAGING_DIR);$(TOOLCHAIN_DIR)$(if $(CONFIG_EXTERNAL_TOOLCHAIN),;$(CONFIG_TOOLCHAIN_ROOT))
 CMAKE_HOST_FIND_ROOT_PATH:=$(STAGING_DIR_HOST)
+CMAKE_SHARED_LDFLAGS:=-Wl,-Bsymbolic-functions
 
 define Build/Configure/Default
 	(cd $(PKG_BUILD_DIR); \
@@ -53,8 +54,8 @@ define Build/Configure/Default
 			-DCMAKE_ASM_COMPILER="$(CMAKE_C_COMPILER)" \
 			-DCMAKE_ASM_COMPILER_ARG1="$(CMAKE_C_COMPILER_ARG1)" \
 			-DCMAKE_EXE_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS)" \
-			-DCMAKE_MODULE_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS)" \
-			-DCMAKE_SHARED_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS)" \
+			-DCMAKE_MODULE_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS) $(CMAKE_SHARED_LDFLAGS)" \
+			-DCMAKE_SHARED_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS) $(CMAKE_SHARED_LDFLAGS)" \
 			-DCMAKE_AR="$(CMAKE_AR)" \
 			-DCMAKE_NM="$(CMAKE_NM)" \
 			-DCMAKE_RANLIB="$(CMAKE_RANLIB)" \