diff mbox series

[v2,19/28] scripts/mod: disable LTO for empty.c

Message ID 20200903203053.3411268-20-samitolvanen@google.com (mailing list archive)
State New, archived
Headers show
Series [v2,01/28] x86/boot/compressed: Disable relocation relaxation | expand

Commit Message

Sami Tolvanen Sept. 3, 2020, 8:30 p.m. UTC 
With CONFIG_LTO_CLANG, 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(+)

Comments

Kees Cook Sept. 3, 2020, 10:43 p.m. UTC | #1 
On Thu, Sep 03, 2020 at 01:30:44PM -0700, Sami Tolvanen wrote:
> With CONFIG_LTO_CLANG, 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>

Reviewed-by: Kees Cook <keescook@chromium.org>
diff mbox series

Patch

diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
index 78071681d924..c9e38ad937fd 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_REMOVE_empty.o += $(CC_FLAGS_LTO)
 
 hostprogs-always-y	+= modpost mk_elfconfig
 always-y		+= empty.o