From 6454738d4395c8a79843f5c2e3eeb687f9b7e7a9 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Tue, 2 Oct 2012 16:42:36 +0200 Subject: [PATCH] kbuild: Fix gcc -x syntax commit b1e0d8b70fa31821ebca3965f2ef8619d7c5e316 upstream. 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 Acked-by: Ingo Molnar Cc: Bernhard Walle Cc: Michal Marek Cc: Ralf Baechle Signed-off-by: Michal Marek [bwh: Backported to 3.2: drop unneeded change to arch/x86/Makefile] Signed-off-by: Ben Hutchings --- arch/mips/Makefile | 2 +- arch/mips/kernel/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 +- 10 files changed, 17 insertions(+), 17 deletions(-) diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 0be318609fc6..aaf74443cd68 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -224,7 +224,7 @@ KBUILD_CPPFLAGS += -D"DATAOFFSET=$(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/$$/'/") ifdef CONFIG_64BIT diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 1a966183e353..ce7dd99efd59 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -102,7 +102,7 @@ obj-$(CONFIG_MIPS_MACHINE) += mips_machine.o obj-$(CONFIG_OF) += prom.o -CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi) +CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -x c /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi) obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT) += 8250-platform.o diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 6a3ee981931d..8bb8d3a9f01c 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -98,24 +98,24 @@ try-run = $(shell set -e; \ # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) as-option = $(call try-run,\ - $(CC) $(KBUILD_CFLAGS) $(1) -c -xassembler /dev/null -o "$$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 debecb5561c4..7f2126df91f2 100644 --- 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 29493dc4528d..12dbd0b11ea4 100644 --- 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 afaec618b395..973e8c141567 100644 --- 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 fa59cbf9d62c..854d9c7c675c 100755 --- 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 int main() { diff --git a/scripts/kconfig/lxdialog/check-lxdialog.sh b/scripts/kconfig/lxdialog/check-lxdialog.sh index 82cc3a85e7f8..50df490fe1de 100644 --- 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 b98e3075646b..e45d2b12699d 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -56,7 +56,7 @@ 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 e8a03aceceb1..7db8da5a7864 100644 --- a/tools/power/cpupower/Makefile +++ b/tools/power/cpupower/Makefile @@ -100,7 +100,7 @@ GMO_FILES = ${shell for HLANG in ${LANGUAGES}; do echo po/$$HLANG.gmo; done;} 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) -- 2.39.2