The patch titled
kbuild: fix cc1 options check to ensure we do not use -fPIC when compiling
has been added to the -mm tree. Its filename is
kbuild-fix-cc1-options-check-to-ensure-we-do-not-use-fpic-when-compiling.patch
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------------------------------------------------------
Subject: kbuild: fix cc1 options check to ensure we do not use -fPIC when compiling
From: "Jory A. Pratt" <anarchy@xxxxxxxxxx>
The arch/*/boot/Makefile use cc-options to check for GCC command options
and cc-options use the hardened specs when checking for GCC command
options. When -fPIE is pass to cc1 it can't use -ffreestanding or
-fno-toplevel-reorder. Then it fail to build stuff with -ffreestanding
and -fno-toplevel-reorder.
Thanks to Fredric Johansson for finding the main problem behind a failed
build using a hardened toolchain.
Signed-off-by: Magnus Granberg <zorry@xxxxxx>
Signed-off-by: Jory A. Pratt <anarchy@xxxxxxxxxx>
Cc: Fredric Johansson <johansson_fredric@xxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/Kbuild.include | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN scripts/Kbuild.include~kbuild-fix-cc1-options-check-to-ensure-we-do-not-use-fpic-when-compiling scripts/Kbuild.include
--- a/scripts/Kbuild.include~kbuild-fix-cc1-options-check-to-ensure-we-do-not-use-fpic-when-compiling
+++ a/scripts/Kbuild.include
@@ -105,12 +105,12 @@ as-instr = $(call try-run,\
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
cc-option = $(call try-run,\
- $(CC) $(KBUILD_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",$(1),$(2))
+ $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",$(1),$(2))
# cc-option-yn
# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
cc-option-yn = $(call try-run,\
- $(CC) $(KBUILD_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",y,n)
+ $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",y,n)
# cc-option-align
# Prefix align with either -falign or -malign
_
Patches currently in -mm which might be from anarchy@xxxxxxxxxx are
kbuild-fix-cc1-options-check-to-ensure-we-do-not-use-fpic-when-compiling.patch
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