build: unify target independent optimization options

Signed-off-by: Felix Fietkau <[email protected]>

SVN-Revision: 37600

Config.in

@@ -847,6 +847,12 @@ menuconfig DEVEL
 		  in the package directory, pointing to the .git tree that you want
 		  to pull the source code from
 
+	config EXTRA_OPTIMIZATION
+		string "Additional compiler options" if DEVEL
+		default "-fno-caller-saves"
+		help
+		  Extra Target-independent optimizations to use when building for the target.
+
 menuconfig TARGET_OPTIONS
 	bool "Target Options"  if DEVEL
 

include/target.mk

@@ -191,17 +191,17 @@ ifeq ($(DUMP),1)
     # remove duplicates
     FEATURES:=$(sort $(FEATURES))
   endif
-  DEFAULT_CFLAGS_i386=-O2 -pipe -march=i486 -fno-caller-saves
-  DEFAULT_CFLAGS_x86_64=-O2 -pipe -march=athlon64 -fno-caller-saves
-  DEFAULT_CFLAGS_m68k=-Os -pipe -mcfv4e -fno-caller-saves
-  DEFAULT_CFLAGS_mips=-Os -pipe -mips32 -mtune=mips32 -fno-caller-saves -mno-branch-likely
+  DEFAULT_CFLAGS_i386=-O2 -pipe -march=i486
+  DEFAULT_CFLAGS_x86_64=-O2 -pipe -march=athlon64
+  DEFAULT_CFLAGS_m68k=-Os -pipe -mcfv4e
+  DEFAULT_CFLAGS_mips=-Os -pipe -mips32 -mtune=mips32 -mno-branch-likely
   DEFAULT_CFLAGS_mipsel=$(DEFAULT_CFLAGS_mips)
-  DEFAULT_CFLAGS_mips64=-Os -pipe -mips64 -mtune=mips64 -mabi=64 -fno-caller-saves
+  DEFAULT_CFLAGS_mips64=-Os -pipe -mips64 -mtune=mips64 -mabi=64
   DEFAULT_CFLAGS_mips64el=$(DEFAULT_CFLAGS_mips64)
-  DEFAULT_CFLAGS_sparc=-Os -pipe -mcpu=ultrasparc -fno-caller-saves
-  DEFAULT_CFLAGS_arm=-Os -pipe -march=armv5te -mtune=xscale -fno-caller-saves
+  DEFAULT_CFLAGS_sparc=-Os -pipe -mcpu=ultrasparc
+  DEFAULT_CFLAGS_arm=-Os -pipe -march=armv5te -mtune=xscale
   DEFAULT_CFLAGS_armeb=$(DEFAULT_CFLAGS_arm)
-  DEFAULT_CFLAGS=$(if $(DEFAULT_CFLAGS_$(ARCH)),$(DEFAULT_CFLAGS_$(ARCH)),-Os -pipe -fno-caller-saves)
+  DEFAULT_CFLAGS=$(if $(DEFAULT_CFLAGS_$(ARCH)),$(DEFAULT_CFLAGS_$(ARCH)),-Os -pipe)
 endif
 
 define BuildTargets/DumpCurrent

rules.mk

@@ -38,6 +38,7 @@ ARCH:=$(subst i486,i386,$(subst i586,i386,$(subst i686,i386,$(call qstrip,$(CONF
 ARCH_PACKAGES:=$(call qstrip,$(CONFIG_TARGET_ARCH_PACKAGES))
 BOARD:=$(call qstrip,$(CONFIG_TARGET_BOARD))
 TARGET_OPTIMIZATION:=$(call qstrip,$(CONFIG_TARGET_OPTIMIZATION))
+export EXTRA_OPTIMIZATION:=$(call qstrip,$(CONFIG_EXTRA_OPTIMIZATION))
 TARGET_SUFFIX=$(call qstrip,$(CONFIG_TARGET_SUFFIX))
 BUILD_SUFFIX:=$(call qstrip,$(CONFIG_BUILD_SUFFIX))
 SUBDIR:=$(patsubst $(TOPDIR)/%,%,${CURDIR})
@@ -127,7 +128,7 @@ BUILD_LOG_DIR:=$(TOPDIR)/logs
 PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
 
 TARGET_PATH:=$(STAGING_DIR_HOST)/bin:$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
-TARGET_CFLAGS:=$(TARGET_OPTIMIZATION)$(if $(CONFIG_DEBUG), -g3)
+TARGET_CFLAGS:=$(TARGET_OPTIMIZATION)$(if $(CONFIG_DEBUG), -g3) $(EXTRA_OPTIMIZATION)
 TARGET_CXXFLAGS = $(TARGET_CFLAGS)
 TARGET_ASFLAGS = $(TARGET_CFLAGS) $(TARGET_ASFLAGS_OVERRIDE)
 TARGET_CPPFLAGS:=-I$(STAGING_DIR)/usr/include -I$(STAGING_DIR)/include

target/linux/ar71xx/Makefile

@@ -10,7 +10,7 @@ ARCH:=mips
 BOARD:=ar71xx
 BOARDNAME:=Atheros AR7xxx/AR9xxx
 FEATURES:=squashfs targz mips16
-CFLAGS:=-Os -pipe -mips32r2 -mtune=34kc -fno-caller-saves -mno-branch-likely
+CFLAGS:=-Os -pipe -mips32r2 -mtune=34kc -mno-branch-likely
 SUBTARGETS:=generic nand
 
 LINUX_VERSION:=3.10.3

target/linux/at91/Makefile

@@ -11,7 +11,7 @@ BOARD:=at91
 MAINTAINER:=Claudio Mignanti <[email protected]>
 BOARDNAME:=Atmel AT91
 FEATURES:=squashfs targz ext2 usb
-CFLAGS:=-Os -pipe -march=armv5te -mtune=arm926ej-s -fno-caller-saves
+CFLAGS:=-Os -pipe -march=armv5te -mtune=arm926ej-s
 
 LINUX_VERSION:=3.8.13
 

target/linux/cns21xx/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=cns21xx
 BOARDNAME:=Cavium Networks Econa CNS21xx
 FEATURES:=squashfs
-CFLAGS:=-Os -pipe -march=armv4 -mtune=fa526 -fno-caller-saves
+CFLAGS:=-Os -pipe -march=armv4 -mtune=fa526
 
 LINUX_VERSION:=3.8.13
 

target/linux/cns3xxx/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=cns3xxx
 BOARDNAME:=Cavium Networks Econa CNS3xxx
 FEATURES:=squashfs fpu gpio pcie usb usbgadget
-CFLAGS:=-Os -pipe -march=armv6k -mtune=mpcore -mfloat-abi=softfp -mfpu=vfp -fno-caller-saves
+CFLAGS:=-Os -pipe -march=armv6k -mtune=mpcore -mfloat-abi=softfp -mfpu=vfp
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=3.8.13

target/linux/cobalt/Makefile

@@ -10,7 +10,7 @@ ARCH:=mipsel
 BOARD:=cobalt
 BOARDNAME:=Cobalt Microservers
 FEATURES:=targz pci ext4 display
-CFLAGS:=-O2 -pipe -mtune=r5000 -fno-caller-saves
+CFLAGS:=-O2 -pipe -mtune=r5000
 MAINTAINER:=Florian Fainelli <[email protected]>
 
 LINUX_VERSION:=3.3.8

target/linux/ep93xx/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=ep93xx
 BOARDNAME:=Cirrus Logic EP93xx
 FEATURES:=squashfs ext4 targz usb display sound
-CFLAGS:=-Os -pipe -march=armv4t -fno-caller-saves
+CFLAGS:=-Os -pipe -march=armv4t
 MAINTAINER:=Florian Fainelli <[email protected]>
 
 LINUX_VERSION:=3.8.13

target/linux/gemini/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=gemini
 BOARDNAME:=Cortina Systems CS351x
 FEATURES:=squashfs pci
-CFLAGS:=-Os -pipe -march=armv4 -mtune=fa526 -fno-caller-saves
+CFLAGS:=-Os -pipe -march=armv4 -mtune=fa526
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=3.9.11

target/linux/generic/patches-3.10/201-extra_optimization.patch

@@ -5,10 +5,10 @@
 
  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 -KBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)
-+KBUILD_CFLAGS	+= -Os -fno-caller-saves $(call cc-disable-warning,maybe-uninitialized,)
++KBUILD_CFLAGS	+= -Os $(EXTRA_OPTIMIZATION) $(call cc-disable-warning,maybe-uninitialized,)
  else
 -KBUILD_CFLAGS	+= -O2
-+KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch -fno-caller-saves
++KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION)
  endif
 
  include $(srctree)/arch/$(SRCARCH)/Makefile

target/linux/generic/patches-3.3/201-extra_optimization.patch

@@ -5,10 +5,10 @@
 
  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 -KBUILD_CFLAGS	+= -Os
-+KBUILD_CFLAGS	+= -Os -fno-caller-saves
++KBUILD_CFLAGS	+= -Os $(EXTRA_OPTIMIZATION)
  else
 -KBUILD_CFLAGS	+= -O2
-+KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch -fno-caller-saves
++KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION)
  endif
 
  include $(srctree)/arch/$(SRCARCH)/Makefile

target/linux/generic/patches-3.6/201-extra_optimization.patch

@@ -5,10 +5,10 @@
 
  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 -KBUILD_CFLAGS	+= -Os
-+KBUILD_CFLAGS	+= -Os -fno-caller-saves
++KBUILD_CFLAGS	+= -Os $(EXTRA_OPTIMIZATION)
  else
 -KBUILD_CFLAGS	+= -O2
-+KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch -fno-caller-saves
++KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION)
  endif
 
  include $(srctree)/arch/$(SRCARCH)/Makefile

target/linux/generic/patches-3.8/201-extra_optimization.patch

@@ -5,10 +5,10 @@
 
  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 -KBUILD_CFLAGS	+= -Os
-+KBUILD_CFLAGS	+= -Os -fno-caller-saves
++KBUILD_CFLAGS	+= -Os $(EXTRA_OPTIMIZATION)
  else
 -KBUILD_CFLAGS	+= -O2
-+KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch -fno-caller-saves
++KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION)
  endif
 
  include $(srctree)/arch/$(SRCARCH)/Makefile

target/linux/generic/patches-3.9/201-extra_optimization.patch

@@ -5,10 +5,10 @@
 
  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 -KBUILD_CFLAGS	+= -Os
-+KBUILD_CFLAGS	+= -Os -fno-caller-saves
++KBUILD_CFLAGS	+= -Os $(EXTRA_OPTIMIZATION)
  else
 -KBUILD_CFLAGS	+= -O2
-+KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch -fno-caller-saves
++KBUILD_CFLAGS	+= -O2 -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION)
  endif
 
  include $(srctree)/arch/$(SRCARCH)/Makefile

target/linux/imx23/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=imx23
 BOARDNAME:=Freescale i.MX23 series
 FEATURES:=ext4 rtc usb gpio
-CFLAGS:=-Os -pipe -march=armv5te -mtune=arm926ej-s -fno-caller-saves
+CFLAGS:=-Os -pipe -march=armv5te -mtune=arm926ej-s
 MAINTAINER:=Zoltan HERPAI <[email protected]>
 LINUX_VERSION:=3.10.3
 KERNELNAME:="zImage dtbs"

target/linux/lantiq/Makefile

@@ -13,7 +13,7 @@ SUBTARGETS=xway ase falcon
 
 LINUX_VERSION:=3.8.13
 
-CFLAGS=-Os -pipe -mips32r2 -fno-caller-saves -mno-branch-likely
+CFLAGS=-Os -pipe -mips32r2 -mno-branch-likely
 
 define Target/Description
 	Build firmware images for Lantiq SoC

target/linux/malta/be/target.mk

@@ -3,7 +3,7 @@ ARCH_PACKAGES:=malta_mips
 SUBTARGET:=be
 BOARDNAME:=Big Endian
 FEATURES:=ramdisk mips16
-CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2 -fno-caller-saves
+CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2
 
 define Target/Description
 	Build BE firmware images for MIPS Malta CoreLV board running in

target/linux/malta/be64/target.mk

@@ -2,7 +2,7 @@ ARCH:=mips64
 ARCH_PACKAGES:=malta_mips64
 SUBTARGET:=be64
 BOARDNAME:=Big Endian (64-bits)
-CFLAGS:=-Os -pipe -mips64 -mtune=mips64 -fno-caller-saves
+CFLAGS:=-Os -pipe -mips64 -mtune=mips64
 FEATURES:=ramdisk
 
 define Target/Description

target/linux/malta/le/target.mk

@@ -3,7 +3,7 @@ ARCH_PACKAGES:=malta_mipsel
 SUBTARGET:=le
 BOARDNAME:=Little Endian
 FEATURES:=ramdisk mips16
-CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2 -fno-caller-saves
+CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2
 
 define Target/Description
 	Build LE firmware images for MIPS Malta CoreLV board running in

target/linux/malta/le64/target.mk

@@ -2,7 +2,7 @@ ARCH:=mips64el
 ARCH_PACKAGES:=malta_mipsel64
 SUBTARGET:=le64
 BOARDNAME:=Little Endian (64-bits)
-CFLAGS:=-Os -pipe -mips64 -mtune=mips64 -fno-caller-saves
+CFLAGS:=-Os -pipe -mips64 -mtune=mips64
 FEATURES:=ramdisk
 
 define Target/Description

target/linux/mcs814x/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=mcs814x
 BOARDNAME:=Moschip MCS814x
 FEATURES:=usb squashfs
-CFLAGS=-Os -pipe -march=armv5te -mtune=arm926ej-s -fno-caller-saves
+CFLAGS=-Os -pipe -march=armv5te -mtune=arm926ej-s
 MAINTAINER:=Florian Fainelli <[email protected]>
 
 LINUX_VERSION:=3.3.8

target/linux/mpc52xx/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=powerpc
 BOARD:=mpc52xx
 BOARDNAME:=Freescale MPC52xx
-CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=603e
+CFLAGS:=-Os -pipe -mcpu=603e
 FEATURES:=targz ext4
 
 LINUX_VERSION:=3.8.13

target/linux/mpc83xx/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=powerpc
 BOARD:=mpc83xx
 BOARDNAME:=Freescale MPC83xx
-CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=603e
+CFLAGS:=-Os -pipe -mcpu=603e
 FEATURES:=squashfs targz
 MAINTAINER:=Imre Kaloz <[email protected]>
 

target/linux/mpc85xx/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=powerpc
 BOARD:=mpc85xx
 BOARDNAME:=Freescale MPC85xx
-CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=8540
+CFLAGS:=-Os -pipe -mcpu=8540
 FEATURES:=spe_fpu squashfs
 MAINTAINER:=Imre Kaloz <[email protected]>
 SUBTARGETS=generic p1020

target/linux/omap24xx/Makefile

@@ -18,7 +18,7 @@ define Target/Description
 	TI OMAP-24xx
 endef
 
-CFLAGS:=-Os -pipe -march=armv6 -mtune=arm1136j-s -fno-caller-saves
+CFLAGS:=-Os -pipe -march=armv6 -mtune=arm1136j-s
 
 KERNELNAME:="zImage"
 

target/linux/orion/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=orion
 BOARDNAME:=Marvell Orion
 SUBTARGETS:=generic harddisk
-CFLAGS=-Os -pipe -march=armv5te -mtune=xscale -fno-caller-saves
+CFLAGS=-Os -pipe -march=armv5te -mtune=xscale
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=3.3.8

target/linux/ppc40x/Makefile

@@ -10,7 +10,7 @@ ARCH:=powerpc
 BOARD:=ppc40x
 BOARDNAME:=AMCC/IBM PPC40x
 FEATURES:=squashfs
-CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=405
+CFLAGS:=-Os -pipe -mcpu=405
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=3.8.13

target/linux/ppc44x/Makefile

@@ -10,7 +10,7 @@ ARCH:=powerpc
 BOARD:=ppc44x
 BOARDNAME:=AMCC/IBM PPC44x
 FEATURES:=squashfs broken
-CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=440
+CFLAGS:=-Os -pipe -mcpu=440
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=3.8.13

target/linux/ramips/Makefile

@@ -10,7 +10,7 @@ ARCH:=mipsel
 BOARD:=ramips
 BOARDNAME:=Ralink RT288x/RT3xxx
 SUBTARGETS:=rt288x rt305x rt3883 mt7620a
-CFLAGS:=-Os -pipe -fno-caller-saves -mno-branch-likely
+CFLAGS:=-Os -pipe -mno-branch-likely
 FEATURES:=squashfs gpio
 
 LINUX_VERSION:=3.10.3

target/linux/realview/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=realview
 BOARDNAME:=ARM Ltd. Realview board (qemu)
 FEATURES:=fpu ramdisk
-CFLAGS:=-Os -pipe -march=armv6k -mtune=mpcore -mfloat-abi=softfp -mfpu=vfp -fno-caller-saves
+CFLAGS:=-Os -pipe -march=armv6k -mtune=mpcore -mfloat-abi=softfp -mfpu=vfp
 MAINTAINER:=Florian Fainelli <[email protected]>
 
 LINUX_VERSION:=3.10.3

target/linux/sibyte/Makefile

@@ -10,7 +10,7 @@ ARCH:=mips
 BOARD:=sibyte
 BOARDNAME:=Broadcom/SiByte SB-1
 FEATURES:=fpu ramdisk broken
-CFLAGS:=-Os -pipe -march=sb1 -fno-caller-saves
+CFLAGS:=-Os -pipe -march=sb1
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=3.3.8

target/linux/x86/rdc/target.mk

@@ -1,6 +1,6 @@
 BOARDNAME:=RDC R-321x
 FEATURES:=squashfs pci usb gpio pcmcia
-CFLAGS:=-Os -pipe -march=i486 -mtune=i486 -fno-caller-saves
+CFLAGS:=-Os -pipe -march=i486 -mtune=i486
 MAINTAINER:=Florian Fainelli <[email protected]>
 
 DEFAULT_PACKAGES += kmod-llc kmod-stp kmod-bridge kmod-8021q \