global cflags: remove -funit-at-a-time, it is ignored by recent compilers. instead add -fno-caller-saves, which improves compression ratio for generated code with no apparent negative effects on performance

SVN-Revision: 26300

include/target.mk

@@ -157,17 +157,17 @@ ifeq ($(DUMP),1)
     # remove duplicates
     FEATURES:=$(sort $(FEATURES))
   endif
-  DEFAULT_CFLAGS_i386=-O2 -pipe -march=i486 -funit-at-a-time
-  DEFAULT_CFLAGS_x86_64=-O2 -pipe -march=athlon64 -funit-at-a-time
-  DEFAULT_CFLAGS_m68k=-Os -pipe -mcfv4e -funit-at-a-time
-  DEFAULT_CFLAGS_mips=-Os -pipe -mips32 -mtune=mips32 -funit-at-a-time
+  DEFAULT_CFLAGS_i386=-O2 -pipe -march=i486 -fno-caller-saves
+  DEFAULT_CFLAGS_x86_64=-O2 -pipe -march=athlon64 -fno-caller-saves
+  DEFAULT_CFLAGS_m68k=-Os -pipe -mcfv4e -fno-caller-saves
+  DEFAULT_CFLAGS_mips=-Os -pipe -mips32 -mtune=mips32 -fno-caller-saves
   DEFAULT_CFLAGS_mipsel=$(DEFAULT_CFLAGS_mips)
-  DEFAULT_CFLAGS_mips64=-Os -pipe -mips64 -mtune=mips64 -mabi=64 -funit-at-a-time
+  DEFAULT_CFLAGS_mips64=-Os -pipe -mips64 -mtune=mips64 -mabi=64 -fno-caller-saves
   DEFAULT_CFLAGS_mips64el=$(DEFAULT_CFLAGS_mips64)
-  DEFAULT_CFLAGS_sparc=-Os -pipe -mcpu=ultrasparc -funit-at-a-time
-  DEFAULT_CFLAGS_arm=-Os -pipe -march=armv5te -mtune=xscale -funit-at-a-time
+  DEFAULT_CFLAGS_sparc=-Os -pipe -mcpu=ultrasparc -fno-caller-saves
+  DEFAULT_CFLAGS_arm=-Os -pipe -march=armv5te -mtune=xscale -fno-caller-saves
   DEFAULT_CFLAGS_armeb=$(DEFAULT_CFLAGS_arm)
-  DEFAULT_CFLAGS=$(if $(DEFAULT_CFLAGS_$(ARCH)),$(DEFAULT_CFLAGS_$(ARCH)),-Os -pipe -funit-at-a-time)
+  DEFAULT_CFLAGS=$(if $(DEFAULT_CFLAGS_$(ARCH)),$(DEFAULT_CFLAGS_$(ARCH)),-Os -pipe -fno-caller-saves)
 endif
 
 define BuildTargets/DumpCurrent

target/linux/ar71xx/Makefile

@@ -10,7 +10,7 @@ ARCH:=mips
 BOARD:=ar71xx
 BOARDNAME:=Atheros AR71xx/AR7240/AR913x
 FEATURES:=squashfs jffs2 targz
-CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2 -funit-at-a-time
+CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2 -fno-caller-saves
 SUBTARGETS:=generic nand
 
 LINUX_VERSION:=2.6.37.4

target/linux/at91/Makefile

@@ -11,7 +11,7 @@ BOARD:=at91
 MAINTAINER:=Claudio Mignanti <[email protected]>
 BOARDNAME:=Atmel AT91
 FEATURES:=squashfs jffs2 targz
-CFLAGS:=-Os -pipe -march=armv5te -mtune=arm926ej-s -funit-at-a-time
+CFLAGS:=-Os -pipe -march=armv5te -mtune=arm926ej-s -fno-caller-saves
 SUBTARGETS:=netus tqma9263
 
 LINUX_VERSION:=2.6.38

target/linux/cns21xx/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=cns21xx
 BOARDNAME:=Cavium Networks CNS21xx
 FEATURES:=squashfs broken
-CFLAGS:=-Os -pipe -march=armv4 -mtune=fa526 -funit-at-a-time
+CFLAGS:=-Os -pipe -march=armv4 -mtune=fa526 -fno-caller-saves
 
 LINUX_VERSION:=2.6.36.4
 

target/linux/cns3xxx/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=cns3xxx
 BOARDNAME:=Cavium Networks Econa CNS3xxx
 FEATURES:=squashfs fpu gpio
-CFLAGS:=-Os -pipe -march=armv6k -mtune=mpcore -mfloat-abi=softfp -mfpu=vfp -funit-at-a-time
+CFLAGS:=-Os -pipe -march=armv6k -mtune=mpcore -mfloat-abi=softfp -mfpu=vfp -fno-caller-saves
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=2.6.31.14

target/linux/cobalt/Makefile

@@ -10,7 +10,7 @@ ARCH:=mipsel
 BOARD:=cobalt
 BOARDNAME:=Cobalt Microservers
 FEATURES:=targz pci ext4
-CFLAGS:=-O2 -pipe -mtune=r5000 -funit-at-a-time
+CFLAGS:=-O2 -pipe -mtune=r5000 -fno-caller-saves
 
 LINUX_VERSION:=2.6.32.33
 

target/linux/ep93xx/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=ep93xx
 BOARDNAME:=Cirrus Logic EP93xx
 FEATURES:=squashfs jffs2 ext4 targz usb
-CFLAGS:=-Os -pipe -march=armv4t -funit-at-a-time
+CFLAGS:=-Os -pipe -march=armv4t -fno-caller-saves
 
 LINUX_VERSION:=2.6.36.4
 

target/linux/gemini/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=gemini
 BOARDNAME:=Cortina Systems CS351x
 FEATURES:=squashfs
-CFLAGS:=-Os -pipe -march=armv4 -mtune=fa526 -funit-at-a-time
+CFLAGS:=-Os -pipe -march=armv4 -mtune=fa526 -fno-caller-saves
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=2.6.37.4

target/linux/goldfish/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=goldfish
 BOARDNAME:=Goldfish (Android Emulator)
 FEATURES:=
-CFLAGS:=-O2 -pipe -march=armv5te -mtune=xscale -funit-at-a-time
+CFLAGS:=-O2 -pipe -march=armv5te -mtune=xscale -fno-caller-saves
 
 LINUX_VERSION:=2.6.30.10
 

target/linux/imx21/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=imx21
 BOARDNAME:=Freescale i.MX21
 FEATURES:=jffs2 broken
-CFLAGS:=-Os -pipe -march=armv5te -mtune=arm926ej-s -funit-at-a-time
+CFLAGS:=-Os -pipe -march=armv5te -mtune=arm926ej-s -fno-caller-saves
 
 LINUX_VERSION:=2.6.37.4
 

target/linux/lantiq/Makefile

@@ -14,7 +14,7 @@ SUBTARGETS:=falcon xway
 
 LINUX_VERSION:=2.6.37.4
 
-CFLAGS=-Os -pipe -mips32r2 -mtune=mips32r2 -funit-at-a-time
+CFLAGS=-Os -pipe -mips32r2 -mtune=mips32r2 -fno-caller-saves
 
 include $(INCLUDE_DIR)/target.mk
 

target/linux/leon/Makefile

@@ -11,7 +11,7 @@ BOARD:=leon
 BOARDNAME:=LEON
 FEATURES+=fpu tgz
 
-CFLAGS:=-Os -pipe -mcpu=v8 -funit-at-a-time
+CFLAGS:=-Os -pipe -mcpu=v8 -fno-caller-saves
 KERNELNAME:="uImage"
 
 LINUX_VERSION:=2.6.36.4

target/linux/malta/Makefile

@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 
 BOARD:=malta
 BOARDNAME:=MIPS Malta CoreLV board (qemu)
-CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2 -funit-at-a-time
+CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2 -fno-caller-saves
 SUBTARGETS:=le be
 INITRAMFS_EXTRA_FILES:=
 

target/linux/mpc52xx/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=powerpc
 BOARD:=mpc52xx
 BOARDNAME:=Freescale MPC52xx
-CFLAGS:=-Os -pipe -funit-at-a-time -mcpu=603e
+CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=603e
 FEATURES:=targz ext4
 
 LINUX_VERSION:=2.6.30.10

target/linux/mpc83xx/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=powerpc
 BOARD:=mpc83xx
 BOARDNAME:=Freescale MPC83xx
-CFLAGS:=-Os -pipe -funit-at-a-time -mcpu=603e
+CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=603e
 FEATURES:=squashfs targz broken
 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 -funit-at-a-time -mcpu=8540
+CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=8540
 FEATURES:=spe_fpu ramdisk
 MAINTAINER:=Imre Kaloz <[email protected]>
 

target/linux/octeon/Makefile

@@ -10,7 +10,7 @@ ARCH:=mips
 BOARD:=octeon
 BOARDNAME:=Cavium Networks Octeon
 FEATURES:=squashfs jffs2 pci usb
-CFLAGS:=-Os -pipe -march=octeon -funit-at-a-time
+CFLAGS:=-Os -pipe -march=octeon -fno-caller-saves
 
 LINUX_VERSION:=2.6.37.4
 

target/linux/orion/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=orion
 BOARDNAME:=Marvell Orion
 SUBTARGETS:=generic harddisk
-CFLAGS=-Os -pipe -march=armv5t -mtune=xscale -funit-at-a-time
+CFLAGS=-Os -pipe -march=armv5t -mtune=xscale -fno-caller-saves
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=2.6.37.4

target/linux/ppc40x/Makefile

@@ -10,7 +10,7 @@ ARCH:=powerpc
 BOARD:=ppc40x
 BOARDNAME:=AMCC/IBM PPC40x
 FEATURES:=squashfs
-CFLAGS:=-Os -pipe -funit-at-a-time -mcpu=405
+CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=405
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=2.6.32.33

target/linux/ppc44x/Makefile

@@ -10,7 +10,7 @@ ARCH:=powerpc
 BOARD:=ppc44x
 BOARDNAME:=AMCC/IBM PPC44x
 FEATURES:=squashfs
-CFLAGS:=-Os -pipe -funit-at-a-time -mcpu=440
+CFLAGS:=-Os -pipe -fno-caller-saves -mcpu=440
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=2.6.32.33

target/linux/ramips/Makefile

@@ -10,7 +10,7 @@ ARCH:=mipsel
 BOARD:=ramips
 BOARDNAME:=Ralink RT288x/RT305x
 SUBTARGETS:=rt288x rt305x
-CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2 -funit-at-a-time
+CFLAGS:=-Os -pipe -mips32r2 -mtune=mips32r2 -fno-caller-saves
 FEATURES:=squashfs
 
 LINUX_VERSION:=2.6.36.4

target/linux/rdc/Makefile

@@ -10,7 +10,7 @@ ARCH:=i386
 BOARD:=rdc
 BOARDNAME:=RDC 321x
 FEATURES:=squashfs jffs2 pci usb pcmcia
-CFLAGS:=-Os -pipe -march=i486 -mtune=i486 -funit-at-a-time
+CFLAGS:=-Os -pipe -march=i486 -mtune=i486 -fno-caller-saves
 
 LINUX_VERSION:=2.6.32.33
 

target/linux/realview/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=realview
 BOARDNAME:=ARM Ltd. Realview board (qemu)
 FEATURES:=squashfs jffs2 fpu
-CFLAGS:=-Os -pipe -march=armv6k -mtune=mpcore -mfloat-abi=softfp -mfpu=vfp -funit-at-a-time
+CFLAGS:=-Os -pipe -march=armv6k -mtune=mpcore -mfloat-abi=softfp -mfpu=vfp -fno-caller-saves
 
 LINUX_VERSION:=2.6.37.4
 

target/linux/s3c24xx/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=s3c24xx
 BOARDNAME:=Samsung S3C24xx
 FEATURES:=jffs2
-CFLAGS:=-O2 -pipe -march=armv4t -mtune=arm920t -funit-at-a-time
+CFLAGS:=-O2 -pipe -march=armv4t -mtune=arm920t -fno-caller-saves
 SUBTARGETS:=openmoko-gta02
 
 LINUX_VERSION:=2.6.30.10

target/linux/sibyte/Makefile

@@ -10,7 +10,7 @@ ARCH:=mips
 BOARD:=sibyte
 BOARDNAME:=Broadcom/SiByte SB-1
 FEATURES:=fpu ramdisk
-CFLAGS:=-Os -pipe -march=sb1 -funit-at-a-time
+CFLAGS:=-Os -pipe -march=sb1 -fno-caller-saves
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 LINUX_VERSION:=2.6.37.4