kbuild: move -gsplit-dwarf, -gdwarf-4 option tests to Kconfig

CONFIG_DEBUG_INFO_SPLIT and CONFIG_DEBUG_INFO_DWARF4 enable extra
dwarf options if supported. You never know if they are really enabled
since Makefile may silently turn them off.

The actual behavior will match to the kernel configuration by
testing those compiler flags in the Kconfig stage.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d4df5b24d75e..dfc9949b6abe 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -179,6 +179,7 @@ config DEBUG_INFO_REDUCED
 config DEBUG_INFO_SPLIT
         bool "Produce split debuginfo in .dwo files"
         depends on DEBUG_INFO
+        depends on $(cc-option,-gsplit-dwarf)
         help
           Generate debug info into separate .dwo files. This significantly
           reduces the build directory size for builds with DEBUG_INFO,
@@ -194,6 +195,7 @@ config DEBUG_INFO_SPLIT
 config DEBUG_INFO_DWARF4
         bool "Generate dwarf4 debuginfo"
         depends on DEBUG_INFO
+        depends on $(cc-option,-gdwarf-4)
         help
           Generate dwarf4 debug info. This requires recent versions
           of gcc and gdb. It makes the debug information larger.