4.14-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit ef7cfd00b2caf6edeb7f169682b64be2d0a798cf ]
For the same reason as commit 25896d073d8a ("x86/build: Fix compiler support check for CONFIG_RETPOLINE"), you cannot put this $(error ...) into the parse stage of the top Makefile.
Perhaps I'd propose a more sophisticated solution later, but this is the best I can do for now.
Link: https://lkml.org/lkml/2017/12/25/211 Reported-by: Paul Gortmaker paul.gortmaker@windriver.com Reported-by: Bernd Edlinger bernd.edlinger@hotmail.de Reported-by: Qian Cai cai@lca.pw Cc: Josh Poimboeuf jpoimboe@redhat.com Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com Tested-by: Qian Cai cai@lca.pw Signed-off-by: Sasha Levin sashal@kernel.org --- Makefile | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/Makefile b/Makefile index be4d1f25cb29..2de4072bcc90 100644 --- a/Makefile +++ b/Makefile @@ -954,11 +954,6 @@ ifdef CONFIG_STACK_VALIDATION ifeq ($(has_libelf),1) objtool_target := tools/objtool FORCE else - ifdef CONFIG_UNWINDER_ORC - $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") - else - $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") - endif SKIP_STACK_VALIDATION := 1 export SKIP_STACK_VALIDATION endif @@ -1102,6 +1097,14 @@ uapi-asm-generic:
PHONY += prepare-objtool prepare-objtool: $(objtool_target) +ifeq ($(SKIP_STACK_VALIDATION),1) +ifdef CONFIG_UNWINDER_ORC + @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 + @false +else + @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 +endif +endif
# Check for CONFIG flags that require compiler support. Abort the build # after .config has been processed, but before the kernel build starts.