The patch titled
From: Jean Delvare <[email protected]>
has been added to the -mm tree. Its filename is
kbuild-fix-gcc-x-syntax.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Jean Delvare <[email protected]>
Subject: kbuild: Fix gcc -x syntax
The correct syntax for gcc -x is "gcc -x assembler", not
"gcc -xassembler". Even though the latter happens to work, the former
is what is documented in the manual page and thus what gcc wrappers
such as icecream do expect.
This isn't a cosmetic change. The missing space prevents icecream from
recognizing compilation tasks it can't handle, leading to silent kernel
miscompilations.
Besides me, credits go to Richard Guenther and Dirk Mueller for
investigating the miscompilation issue and tracking it down to this
incorrect -x parameter syntax.
Signed-off-by: Jean Delvare <[email protected]>
Cc: Bernhard Walle <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Richard Guenther <[email protected]>
Cc: Dirk Mueller <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
arch/mips/Makefile | 2 +-
arch/mips/kernel/Makefile | 2 +-
arch/x86/Makefile | 2 +-
scripts/Kbuild.include | 12 ++++++------
scripts/gcc-version.sh | 6 +++---
scripts/gcc-x86_32-has-stack-protector.sh | 2 +-
scripts/gcc-x86_64-has-stack-protector.sh | 2 +-
scripts/kconfig/check.sh | 2 +-
scripts/kconfig/lxdialog/check-lxdialog.sh | 2 +-
tools/perf/Makefile | 2 +-
tools/power/cpupower/Makefile | 2 +-
11 files changed, 18 insertions(+), 18 deletions(-)
diff -puN arch/mips/Makefile~kbuild-fix-gcc-x-syntax arch/mips/Makefile
--- a/arch/mips/Makefile~kbuild-fix-gcc-x-syntax
+++ a/arch/mips/Makefile
@@ -225,7 +225,7 @@ KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(d
LDFLAGS += -m $(ld-emul)
ifdef CONFIG_MIPS
-CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -xc /dev/null | \
+CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
ifdef CONFIG_64BIT
diff -puN arch/mips/kernel/Makefile~kbuild-fix-gcc-x-syntax
arch/mips/kernel/Makefile
--- a/arch/mips/kernel/Makefile~kbuild-fix-gcc-x-syntax
+++ a/arch/mips/kernel/Makefile
@@ -106,7 +106,7 @@ obj-$(CONFIG_MIPS_MACHINE) += mips_machi
obj-$(CONFIG_OF) += prom.o
-CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o
/dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
+CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o
/dev/null -x c /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT) += 8250-platform.o
diff -puN arch/x86/Makefile~kbuild-fix-gcc-x-syntax arch/x86/Makefile
--- a/arch/x86/Makefile~kbuild-fix-gcc-x-syntax
+++ a/arch/x86/Makefile
@@ -92,7 +92,7 @@ endif
ifdef CONFIG_X86_X32
x32_ld_ok := $(call try-run,\
/bin/echo -e '1: .quad 1b' | \
- $(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$TMP" - && \
+ $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
ifeq ($(x32_ld_ok),y)
diff -puN scripts/Kbuild.include~kbuild-fix-gcc-x-syntax scripts/Kbuild.include
--- a/scripts/Kbuild.include~kbuild-fix-gcc-x-syntax
+++ a/scripts/Kbuild.include
@@ -98,24 +98,24 @@ try-run = $(shell set -e; \
# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
as-option = $(call try-run,\
- $(CC) $(KBUILD_CFLAGS) $(1) -c -xassembler /dev/null -o
"$$TMP",$(1),$(2))
+ $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o
"$$TMP",$(1),$(2))
# as-instr
# Usage: cflags-y += $(call as-instr,instr,option1,option2)
as-instr = $(call try-run,\
- printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$TMP"
-,$(2),$(3))
+ printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o
"$$TMP" -,$(2),$(3))
# cc-option
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
cc-option = $(call try-run,\
- $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -xc /dev/null -o
"$$TMP",$(1),$(2))
+ $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o
"$$TMP",$(1),$(2))
# cc-option-yn
# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
cc-option-yn = $(call try-run,\
- $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -xc /dev/null -o
"$$TMP",y,n)
+ $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o
"$$TMP",y,n)
# cc-option-align
# Prefix align with either -falign or -malign
@@ -125,7 +125,7 @@ cc-option-align = $(subst -functions=0,,
# cc-disable-warning
# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
cc-disable-warning = $(call try-run,\
- $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -xc
/dev/null -o "$$TMP",-Wno-$(strip $(1)))
+ $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c
/dev/null -o "$$TMP",-Wno-$(strip $(1)))
# cc-version
# Usage gcc-ver := $(call cc-version)
@@ -143,7 +143,7 @@ cc-ifversion = $(shell [ $(call cc-versi
# cc-ldoption
# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
cc-ldoption = $(call try-run,\
- $(CC) $(1) -nostdlib -xc /dev/null -o "$$TMP",$(1),$(2))
+ $(CC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
# ld-option
# Usage: LDFLAGS += $(call ld-option, -X)
diff -puN scripts/gcc-version.sh~kbuild-fix-gcc-x-syntax scripts/gcc-version.sh
--- a/scripts/gcc-version.sh~kbuild-fix-gcc-x-syntax
+++ a/scripts/gcc-version.sh
@@ -22,10 +22,10 @@ if [ ${#compiler} -eq 0 ]; then
exit 1
fi
-MAJOR=$(echo __GNUC__ | $compiler -E -xc - | tail -n 1)
-MINOR=$(echo __GNUC_MINOR__ | $compiler -E -xc - | tail -n 1)
+MAJOR=$(echo __GNUC__ | $compiler -E -x c - | tail -n 1)
+MINOR=$(echo __GNUC_MINOR__ | $compiler -E -x c - | tail -n 1)
if [ "x$with_patchlevel" != "x" ] ; then
- PATCHLEVEL=$(echo __GNUC_PATCHLEVEL__ | $compiler -E -xc - | tail -n 1)
+ PATCHLEVEL=$(echo __GNUC_PATCHLEVEL__ | $compiler -E -x c - | tail -n 1)
printf "%02d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
else
printf "%02d%02d\\n" $MAJOR $MINOR
diff -puN scripts/gcc-x86_32-has-stack-protector.sh~kbuild-fix-gcc-x-syntax
scripts/gcc-x86_32-has-stack-protector.sh
--- a/scripts/gcc-x86_32-has-stack-protector.sh~kbuild-fix-gcc-x-syntax
+++ a/scripts/gcc-x86_32-has-stack-protector.sh
@@ -1,6 +1,6 @@
#!/bin/sh
-echo "int foo(void) { char X[200]; return 3; }" | $* -S -xc -c -O0
-fstack-protector - -o - 2> /dev/null | grep -q "%gs"
+echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0
-fstack-protector - -o - 2> /dev/null | grep -q "%gs"
if [ "$?" -eq "0" ] ; then
echo y
else
diff -puN scripts/gcc-x86_64-has-stack-protector.sh~kbuild-fix-gcc-x-syntax
scripts/gcc-x86_64-has-stack-protector.sh
--- a/scripts/gcc-x86_64-has-stack-protector.sh~kbuild-fix-gcc-x-syntax
+++ a/scripts/gcc-x86_64-has-stack-protector.sh
@@ -1,6 +1,6 @@
#!/bin/sh
-echo "int foo(void) { char X[200]; return 3; }" | $* -S -xc -c -O0
-mcmodel=kernel -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
+echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0
-mcmodel=kernel -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
if [ "$?" -eq "0" ] ; then
echo y
else
diff -puN scripts/kconfig/check.sh~kbuild-fix-gcc-x-syntax
scripts/kconfig/check.sh
--- a/scripts/kconfig/check.sh~kbuild-fix-gcc-x-syntax
+++ a/scripts/kconfig/check.sh
@@ -1,6 +1,6 @@
#!/bin/sh
# Needed for systems without gettext
-$* -xc -o /dev/null - > /dev/null 2>&1 << EOF
+$* -x c -o /dev/null - > /dev/null 2>&1 << EOF
#include <libintl.h>
int main()
{
diff -puN scripts/kconfig/lxdialog/check-lxdialog.sh~kbuild-fix-gcc-x-syntax
scripts/kconfig/lxdialog/check-lxdialog.sh
--- a/scripts/kconfig/lxdialog/check-lxdialog.sh~kbuild-fix-gcc-x-syntax
+++ a/scripts/kconfig/lxdialog/check-lxdialog.sh
@@ -38,7 +38,7 @@ trap "rm -f $tmp" 0 1 2 3 15
# Check if we can link to ncurses
check() {
- $cc -xc - -o $tmp 2>/dev/null <<'EOF'
+ $cc -x c - -o $tmp 2>/dev/null <<'EOF'
#include CURSES_LOC
main() {}
EOF
diff -puN tools/perf/Makefile~kbuild-fix-gcc-x-syntax tools/perf/Makefile
--- a/tools/perf/Makefile~kbuild-fix-gcc-x-syntax
+++ a/tools/perf/Makefile
@@ -72,7 +72,7 @@ ifeq ($(ARCH),x86_64)
override ARCH := x86
IS_X86_64 := 0
ifeq (, $(findstring m32,$(EXTRA_CFLAGS)))
- IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n
1)
+ IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -x c - | tail
-n 1)
endif
ifeq (${IS_X86_64}, 1)
RAW_ARCH := x86_64
diff -puN tools/power/cpupower/Makefile~kbuild-fix-gcc-x-syntax
tools/power/cpupower/Makefile
--- a/tools/power/cpupower/Makefile~kbuild-fix-gcc-x-syntax
+++ a/tools/power/cpupower/Makefile
@@ -111,7 +111,7 @@ GMO_FILES = ${shell for HLANG in ${LANGU
export CROSS CC AR STRIP RANLIB CFLAGS LDFLAGS LIB_OBJS
# check if compiler option is supported
-cc-supports = ${shell if $(CC) ${1} -S -o /dev/null -xc /dev/null > /dev/null
2>&1; then echo "$(1)"; fi;}
+cc-supports = ${shell if $(CC) ${1} -S -o /dev/null -x c /dev/null > /dev/null
2>&1; then echo "$(1)"; fi;}
# use '-Os' optimization if available, else use -O2
OPTIMIZATION := $(call cc-supports,-Os,-O2)
_
Patches currently in -mm which might be from [email protected] are
linux-next.patch
kbuild-fix-gcc-x-syntax.patch
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