提交 c47efe55 编写于 作者: J Jory A. Pratt 提交者: Sam Ravnborg

kbuild: fix cc1 options check to ensure we do not use -fPIC when compiling

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: NMagnus Granberg <zorry@ume.nu>
Signed-off-by: NJory A. Pratt <anarchy@gentoo.org>
Cc: Fredric Johansson <johansson_fredric@hotmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Cc: <stable@kernel.org>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
上级 92f3f19c
...@@ -106,12 +106,12 @@ as-instr = $(call try-run,\ ...@@ -106,12 +106,12 @@ as-instr = $(call try-run,\
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
cc-option = $(call try-run,\ 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 # cc-option-yn
# Usage: flag := $(call cc-option-yn,-march=winchip-c6) # Usage: flag := $(call cc-option-yn,-march=winchip-c6)
cc-option-yn = $(call try-run,\ 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 # cc-option-align
# Prefix align with either -falign or -malign # Prefix align with either -falign or -malign
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册