On Sun, Sep 29, 2019 at 11:32:06AM -0700, Nathan Chancellor wrote:
Commit a9d57ef15cbe ("x86/retpolines: Disable switch jump tables when retpolines are enabled") added -fno-jump-tables to workaround a GCC issue while deliberately avoiding adding this flag when CONFIG_CC_IS_CLANG is set, which is defined by the kconfig system when CC=clang is provided.
However, this symbol was added in 4.18 in commit 469cb7376c06 ("kconfig: add CC_IS_CLANG and CLANG_VERSION") so it is always undefined in 4.14, meaning -fno-jump-tables gets added when using Clang.
Fix this up by using the equivalent $(cc-name) comparison, which matches what upstream did until commit 076f421da5d4 ("kbuild: replace cc-name test with CONFIG_CC_IS_CLANG").
Fixes: e28951100515 ("x86/retpolines: Disable switch jump tables when retpolines are enabled") Signed-off-by: Nathan Chancellor natechancellor@gmail.com
arch/x86/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
Now queued up, thanks!
greg k-h