kbuild/all archs: Utilise the cc-* functions

Searched through all architectures and utilised the cc-* functions when appropriate.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

arch/alpha/Makefile

@@ -22,15 +22,11 @@ $(error The assembler '$(AS)' does not support the BWX instruction)
 endif
 
 # Determine if GCC understands the -mcpu= option.
-have_mcpu := $(shell if $(CC) -mcpu=ev5 -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo y; else echo n; fi)
-
-have_mcpu_pca56 := $(shell if $(CC) -mcpu=pca56 -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo y; else echo n; fi)
-
-have_mcpu_ev6 := $(shell if $(CC) -mcpu=ev6 -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo y; else echo n; fi)
-
-have_mcpu_ev67 := $(shell if $(CC) -mcpu=ev67 -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo y; else echo n; fi)
-
-have_msmall_data := $(shell if $(CC) -msmall-data -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo y; else echo n; fi)
+have_mcpu        := $(call cc-option-yn, -mcpu=ev5)
+have_mcpu_pca56  := $(call cc-option-yn, -mcpu=pca56)
+have_mcpu_ev6    := $(call cc-option-yn, -mcpu=ev6)
+have_mcpu_ev67   := $(call cc-option-yn, -mcpu=ev67)
+have_msmall_data := $(call cc-option-yn, -msmall-data)
 
 cflags-$(have_msmall_data) += -msmall-data
 

arch/arm/Makefile

@@ -36,8 +36,8 @@ comma = ,
 # Note that GCC does not numerically define an architecture version
 # macro, but instead defines a whole series of macros which makes
 # testing for a specific architecture or later rather impossible.
-arch-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6 $(call check_gcc,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
-arch-$(CONFIG_CPU_32v5)		:=-D__LINUX_ARM_ARCH__=5 $(call check_gcc,-march=armv5te,-march=armv4)
+arch-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
+arch-$(CONFIG_CPU_32v5)		:=-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4)
 arch-$(CONFIG_CPU_32v4)		:=-D__LINUX_ARM_ARCH__=4 -march=armv4
 arch-$(CONFIG_CPU_32v3)		:=-D__LINUX_ARM_ARCH__=3 -march=armv3
 
@@ -51,11 +51,11 @@ tune-$(CONFIG_CPU_ARM925T)	:=-mtune=arm9tdmi
 tune-$(CONFIG_CPU_ARM926T)	:=-mtune=arm9tdmi
 tune-$(CONFIG_CPU_SA110)	:=-mtune=strongarm110
 tune-$(CONFIG_CPU_SA1100)	:=-mtune=strongarm1100
-tune-$(CONFIG_CPU_XSCALE)	:=$(call check_gcc,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
+tune-$(CONFIG_CPU_XSCALE)	:=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
 tune-$(CONFIG_CPU_V6)		:=-mtune=strongarm
 
 # Need -Uarm for gcc < 3.x
-CFLAGS		+=-mapcs-32 $(arch-y) $(tune-y) $(call check_gcc,-malignment-traps,-mshort-load-bytes) -msoft-float -Wa,-mno-fpu -Uarm
+CFLAGS		+=-mapcs-32 $(arch-y) $(tune-y) $(call cc-option,-malignment-traps,-mshort-load-bytes) -msoft-float -Wa,-mno-fpu -Uarm
 AFLAGS		+=-mapcs-32 $(arch-y) $(tune-y) -msoft-float -Wa,-mno-fpu
 
 CHECKFLAGS	+= -D__arm__=1

arch/ia64/Makefile

@@ -23,9 +23,7 @@ cflags-y	:= -pipe $(EXTRA) -ffixed-r13 -mfixed-range=f12-f15,f32-f127 \
 		   -falign-functions=32 -frename-registers
 CFLAGS_KERNEL	:= -mconstant-gp
 
-GCC_VERSION=$(shell $(CC) -v 2>&1 | fgrep 'gcc version' | cut -f3 -d' ' | cut -f1 -d'.')
-GCC_MINOR_VERSION=$(shell $(CC) -v 2>&1 | fgrep 'gcc version' | cut -f3 -d' ' | cut -f2 -d'.')
-
+GCC_VERSION     := $(call cc-version)
 GAS_STATUS	= $(shell $(srctree)/arch/ia64/scripts/check-gas $(CC) $(OBJDUMP))
 CPPFLAGS += $(shell $(srctree)/arch/ia64/scripts/toolchain-flags $(CC) $(OBJDUMP) $(READELF))
 
@@ -37,16 +35,14 @@ $(error Sorry, you need a newer version of the assember, one that is built from
 		ftp://ftp.hpl.hp.com/pub/linux-ia64/gas-030124.tar.gz)
 endif
 
-ifeq ($(GCC_VERSION),2)
+ifneq ($(shell if [ $(GCC_VERSION) -lt 0300 ] ; then echo "bad"; fi ;),)
 $(error Sorry, your compiler is too old.  GCC v2.96 is known to generate bad code.)
 endif
 
-ifeq ($(GCC_VERSION),3)
- ifeq ($(GCC_MINOR_VERSION),4)
+ifeq ($(GCC_VERSION),0304)
 # Workaround Itanium 1 bugs in gcc 3.4.
 #	cflags-$(CONFIG_ITANIUM)	+= -mtune=merced
 	cflags-$(CONFIG_MCKINLEY)	+= -mtune=mckinley
- endif
 endif
 
 cflags-$(CONFIG_ITANIUM_BSTEP_SPECIFIC)	+= -mb-step

arch/mips/Makefile

@@ -56,14 +56,12 @@ endif
 #
 cflags-y			:= -I $(TOPDIR)/include/asm/gcc
 cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
-cflags-y			+= $(call check_gcc, -finline-limit=100000,)
+cflags-y			+= $(call cc-option, -finline-limit=100000)
 LDFLAGS_vmlinux			+= -G 0 -static -n
 MODFLAGS			+= -mlong-calls
 
 cflags-$(CONFIG_SB1XXX_CORELIS)	+= -mno-sched-prolog -fno-omit-frame-pointer
 
-check_warning = $(shell if $(CC) $(1) -c -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
-
 #
 # Use: $(call set_gccflags,<cpu0>,<isa0>,<cpu1>,<isa1>,<isa2>)
 #
@@ -162,7 +160,7 @@ cflags-$(CONFIG_CPU_R5432)	+= \
 cflags-$(CONFIG_CPU_NEVADA)	+= \
 			$(call set_gccflags,rm5200,mips4,r5000,mips4,mips2) \
 			-Wa,--trap
-#			$(call check_gcc,-mmad,)
+#			$(call cc-option,-mmad)
 
 cflags-$(CONFIG_CPU_RM7000)	+= \
 			$(call set_gccflags,rm7000,mips4,r5000,mips4,mips2) \

arch/ppc/Makefile

@@ -13,7 +13,7 @@
 # This must match PAGE_OFFSET in include/asm-ppc/page.h.
 KERNELLOAD	:= $(CONFIG_KERNEL_START)
 
-HAS_BIARCH	:= $(shell if $(CC) -m32 -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo y; else echo n; fi;)
+HAS_BIARCH	:= $(call cc-option-yn, -m32)
 ifeq ($(HAS_BIARCH),y)
 AS		:= $(AS) -a32
 LD		:= $(LD) -m elf32ppc
@@ -112,7 +112,7 @@ else
 NEW_AS	:= 0
 endif
 # gcc-3.4 and binutils-2.14 are a fatal combination.
-GCC_VERSION	:= $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
+GCC_VERSION	:= $(call cc-version)
 BAD_GCC_AS	:= $(shell echo mftb 5 | $(AS) -mppc -many -o /dev/null >/dev/null 2>&1 && echo 0 || echo 1)
 
 checkbin:

arch/ppc64/Makefile

@@ -15,7 +15,7 @@
 
 KERNELLOAD	:= 0xc000000000000000
 
-HAS_BIARCH      := $(shell if $(CC) -m64 -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo y; else echo n; fi;)
+HAS_BIARCH      := $(call cc-option-yn, -m64)
 ifeq ($(HAS_BIARCH),y)
 AS              := $(AS) -a64
 LD              := $(LD) -m elf64ppc
@@ -30,14 +30,14 @@ CFLAGS		+= -msoft-float -pipe -Wno-uninitialized -mminimal-toc \
 		   -mtraceback=none
 
 ifeq ($(CONFIG_POWER4_ONLY),y)
-	CFLAGS += $(call check_gcc,-mcpu=power4,)
+	CFLAGS += $(call cc-option,-mcpu=power4)
 else
-	CFLAGS += $(call check_gcc,-mtune=power4,)
+	CFLAGS += $(call cc-option,-mtune=power4)
 endif
 
 # Enable unit-at-a-time mode when possible. It shrinks the
 # kernel considerably.
-CFLAGS += $(call check_gcc,-funit-at-a-time,)
+CFLAGS += $(call cc-option,-funit-at-a-time)
 
 head-y := arch/ppc64/kernel/head.o
 

arch/s390/Makefile

@@ -28,12 +28,12 @@ AFLAGS		+= -m64
 UTS_MACHINE	:= s390x
 endif
 
-cflags-$(CONFIG_MARCH_G5)   += $(call check_gcc,-march=g5,)
-cflags-$(CONFIG_MARCH_Z900) += $(call check_gcc,-march=z900,)
-cflags-$(CONFIG_MARCH_Z990) += $(call check_gcc,-march=z990,)
+cflags-$(CONFIG_MARCH_G5)   += $(call cc-option,-march=g5)
+cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
+cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
 
 CFLAGS		+= $(cflags-y)
-CFLAGS		+= $(call check_gcc,-finline-limit=10000,)
+CFLAGS		+= $(call cc-option,-finline-limit=10000)
 CFLAGS 		+= -pipe -fno-strength-reduce -Wno-sign-compare 
 CFLAGS		+= -mbackchain
 

arch/sh/Makefile

@@ -31,7 +31,7 @@ cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	:= -ml
 cflags-$(CONFIG_CPU_SH2)		+= -m2
 cflags-$(CONFIG_CPU_SH3)		+= -m3
 cflags-$(CONFIG_CPU_SH4)		+= -m4 \
-	$(call check_gcc,-mno-implicit-fp,-m4-nofpu)
+	$(call cc-option,-mno-implicit-fp,-m4-nofpu)
 
 cflags-$(CONFIG_SH_DSP)			+= -Wa,-dsp
 cflags-$(CONFIG_SH_KGDB)		+= -g

arch/sparc64/Makefile

@@ -14,10 +14,10 @@ CPPFLAGS_vmlinux.lds += -Usparc
 
 CC		:= $(shell if $(CC) -m64 -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo $(CC); else echo sparc64-linux-gcc; fi )
 
-NEW_GCC := $(shell if $(CC) -m64 -mcmodel=medlow -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo y; else echo n; fi; )
+NEW_GCC := $(call cc-option-yn, -m64 -mcmodel=medlow)
 NEW_GAS := $(shell if $(LD) -V 2>&1 | grep 'elf64_sparc' > /dev/null; then echo y; else echo n; fi)
 UNDECLARED_REGS := $(shell if $(CC) -c -x assembler /dev/null -Wa,--help | grep undeclared-regs > /dev/null; then echo y; else echo n; fi; )
-INLINE_LIMIT := $(shell if $(CC) -m64 -finline-limit=100000 -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo y; else echo n; fi; )
+INLINE_LIMIT := $(call cc-option-yn, -m64 -finline-limit=100000)
 
 export NEW_GCC
 

arch/x86_64/Makefile

@@ -39,8 +39,8 @@ LDFLAGS_vmlinux := -e stext
 
 CHECKFLAGS      += -D__x86_64__=1
 
-cflags-$(CONFIG_MK8) += $(call check_gcc,-march=k8,)
-cflags-$(CONFIG_MPSC) += $(call check_gcc,-march=nocona,)
+cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
+cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
 CFLAGS += $(cflags-y)
 
 CFLAGS += -mno-red-zone
@@ -54,11 +54,11 @@ ifneq ($(CONFIG_DEBUG_INFO),y)
 CFLAGS += -fno-asynchronous-unwind-tables
 # -fweb shrinks the kernel a bit, but the difference is very small
 # it also messes up debugging, so don't use it for now.
-#CFLAGS += $(call check_gcc,-fweb,)
+#CFLAGS += $(call cc-option,-fweb)
 endif
 # -funit-at-a-time shrinks the kernel .text considerably
 # unfortunately it makes reading oopses harder.
-CFLAGS += $(call check_gcc,-funit-at-a-time,)
+CFLAGS += $(call cc-option,-funit-at-a-time)
 
 head-y := arch/x86_64/kernel/head.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task.o