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authorLinus Torvalds <torvalds@linux-foundation.org>2021-06-16 08:57:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-16 08:57:44 -0700
commitcc9aaa2b07b948b036c8a3c48bd73fd700b5a139 (patch)
treea7b04a4127ef5fb6614a5b2bf408b30a11f5d0bf /Makefile
parent94f0b2d4a1d0c52035aef425da5e022bd2cb1c71 (diff)
parent0236526d76b87c1dc2cbe3eb31ae29be5b0ca151 (diff)
Merge tag 'clang-features-v5.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull clang LTO fix from Kees Cook: "It seems Clang has been scrubbing through the missing LTO IR flags for Clang 13, and the last of these 'only with LTO' flags is fixed now. I've asked that they please consider making these changes in a less 'break all the Clang kernel builds' kind of way in the future. :P Summary: - The '-warn-stack-size' option under LTO has moved in Clang 13 (Tor Vic)" * tag 'clang-features-v5.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: Makefile: lto: Pass -warn-stack-size only on LLD < 13.0.0
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile5
1 files changed, 4 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index ed669b2d705d..2d7a8df84e2b 100644
--- a/Makefile
+++ b/Makefile
@@ -929,11 +929,14 @@ CC_FLAGS_LTO += -fvisibility=hidden
# Limit inlining across translation units to reduce binary size
KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
-# Check for frame size exceeding threshold during prolog/epilog insertion.
+# Check for frame size exceeding threshold during prolog/epilog insertion
+# when using lld < 13.0.0.
ifneq ($(CONFIG_FRAME_WARN),0)
+ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
endif
endif
+endif
ifdef CONFIG_LTO
KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)