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 Michael Matz and Dirk Mueller for
investigating the miscompilation issue and tracking it down to this
incorrect -x parameter syntax.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: stable@vger.kernel.org
Cc: Bernhard Walle <bernhard@bwalle.de>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 764e37a9dbb34c1b6ecb870457bb0067934f556e..654b1ad39f05fb983e33bfb68a88eaeceb903e01 100644 (file)
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -225,7 +225,7 @@ KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 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 --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index fdaf65e1a99d04ca07d9b5a440d584bccd040029..c6136cb4cd40b6630233b58fb1d080eec32b99b8 100644 (file)
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -104,7 +104,7 @@ obj-$(CONFIG_MIPS_MACHINE)  += mips_machine.o
 
 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 --git a/arch/x86/Makefile b/arch/x86/Makefile
index b0c5276861ec8cc3b5713b6f83335746f812edde..cb8ac935df8263bf896c0ad9f7d68f6d466bde57 100644 (file)
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -88,7 +88,7 @@ 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 --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 6a3ee981931d3c2b4438cff1d220ec2e8039bd7e..8bb8d3a9f01c3563ae2be2966bc834192434499f 100644 (file)
--- a/scripts/Kbuild.include
+++ b/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-version, $(CC)) $(1) $(2) ] && echo $(3))
 # 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 --git a/scripts/gcc-version.sh b/scripts/gcc-version.sh
index debecb5561c481d8076cb97b36857878e6becb37..7f2126df91f2a876a5c8374339f22a6f6f4387ed 100644 (file)
--- a/scripts/gcc-version.sh
+++ b/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 --git a/scripts/gcc-x86_32-has-stack-protector.sh b/scripts/gcc-x86_32-has-stack-protector.sh
index 29493dc4528d0b88032f0b8d2747242e66e8f231..12dbd0b11ea4fe8d037107a590bd1f8baff21eab 100644 (file)
--- a/scripts/gcc-x86_32-has-stack-protector.sh
+++ b/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 --git a/scripts/gcc-x86_64-has-stack-protector.sh b/scripts/gcc-x86_64-has-stack-protector.sh
index afaec618b3955c9147608da4c915bc6159627cf0..973e8c1415677eeba513543655e939de234521e3 100644 (file)
--- a/scripts/gcc-x86_64-has-stack-protector.sh
+++ b/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 --git a/scripts/kconfig/check.sh b/scripts/kconfig/check.sh
index fa59cbf9d62cf464515662c8ae1e98e82eafc99d..854d9c7c675ca4782702e83e1fa04b17aa47d6f8 100755 (executable)
--- a/scripts/kconfig/check.sh
+++ b/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 --git a/scripts/kconfig/lxdialog/check-lxdialog.sh b/scripts/kconfig/lxdialog/check-lxdialog.sh
index e3b12c010417c8e2886c1f57b07379cd483f7878..c8e8a7154753b858e9f51e9c3d6816962d8f549b 100644 (file)
--- a/scripts/kconfig/lxdialog/check-lxdialog.sh
+++ b/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 --git a/tools/perf/Makefile b/tools/perf/Makefile
index 77f124fe57ad54d8e45858f4e4429f6b63f42273..d9776568e8cd6d5317920d89ccbb16eabaee514b 100644 (file)
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -62,7 +62,7 @@ ifeq ($(ARCH),x86_64)
        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 --git a/tools/power/cpupower/Makefile b/tools/power/cpupower/Makefile
index a93e06cfcc2a2f6218a7e7a4397510efa20fc2a3..cf397bd26d0c64bdb51f636987d62f7a3bc2c381 100644 (file)
--- a/tools/power/cpupower/Makefile
+++ b/tools/power/cpupower/Makefile
@@ -111,7 +111,7 @@ GMO_FILES = ${shell for HLANG in ${LANGUAGES}; do echo $(OUTPUT)po/$$HLANG.gmo;
 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)