Thread (63 messages) 63 messages, 11 authors, 2017-11-09
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[PATCH 05/15] scripts/mod: disable LTO for empty.c

From: samitolvanen@google.com (Sami Tolvanen)
Date: 2017-11-03 17:12:55
Also in: lkml
Subsystem: kernel build + files below scripts/ (unless maintained elsewhere), the rest · Maintainers: Nathan Chancellor, Nicolas Schier, Linus Torvalds 

With CONFIG_CLANG_LTO, clang generates LLVM IR instead of ELF object
files. As empty.o is used for probing target properties, disable LTO
for it to produce an object file instead.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
---
 scripts/mod/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
index 42c5d50f2bcc..e014b2fdd069 100644
--- a/scripts/mod/Makefile
+++ b/scripts/mod/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 OBJECT_FILES_NON_STANDARD := y
+CFLAGS_empty.o += $(DISABLE_LTO)
 
 hostprogs-y	:= modpost mk_elfconfig
 always		:= $(hostprogs-y) empty.o
-- 
2.15.0.403.gc27cc4dac6-goog
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