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-rw-r--r--Makefile13
1 files changed, 12 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 2c27a01c42f1..60b729540785 100644
--- a/Makefile
+++ b/Makefile
@@ -995,8 +995,19 @@ prepare0: archprepare FORCE
# All the preparing..
prepare: prepare0 prepare-objtool
+ifdef CONFIG_STACK_VALIDATION
+ has_libelf := $(shell echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf - &> /dev/null && echo 1 || echo 0)
+ ifeq ($(has_libelf),1)
+ objtool_target := tools/objtool FORCE
+ else
+ $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev or elfutils-libelf-devel")
+ SKIP_STACK_VALIDATION := 1
+ export SKIP_STACK_VALIDATION
+ endif
+endif
+
PHONY += prepare-objtool
-prepare-objtool: $(if $(CONFIG_STACK_VALIDATION), tools/objtool FORCE)
+prepare-objtool: $(objtool_target)
# Generate some files
# ---------------------------------------------------------------------------