kbuild: LD_DEAD_CODE_DATA_ELIMINATION no -ffunction-sections/-fdata-s…

…ections for module build Modules do not tend to cope with -ffunction-sections, even though they do not link with -gc-sections. It may be possible for unused symbols to be trimmed from modules, but in general that would take much more work in architecture module linker scripts. For now, enable these only for kernel build. Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Masahiro Yamada <[email protected]>
josf · May 17, 2018 · 6ca8d94 · 6ca8d94
1 parent 266ff2a
commit 6ca8d94
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Makefile b/Makefile
@@ -799,8 +799,8 @@ KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 endif
 
 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
-KBUILD_CFLAGS	+= $(call cc-option,-ffunction-sections,)
-KBUILD_CFLAGS	+= $(call cc-option,-fdata-sections,)
+KBUILD_CFLAGS_KERNEL	+= $(call cc-option,-ffunction-sections,)
+KBUILD_CFLAGS_KERNEL	+= $(call cc-option,-fdata-sections,)
 endif
 
 # arch Makefile may override CC so keep this after arch Makefile is included