openwrt/target/linux/generic-2.4/patches/050-build_flags.patch

--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -44,10 +44,10 @@ MAKEBOOT = $(MAKE) -C arch/$(ARCH)/boot
 GCCFLAGS	:= -I $(TOPDIR)/include/asm/gcc
 GCCFLAGS	+= -G 0 -mno-abicalls -fno-pic -pipe
 GCCFLAGS	+= $(call check_gcc, -finline-limit=100000,)
-LINKFLAGS	+= -G 0 -static -n
-MODFLAGS	+= -mlong-calls
+LINKFLAGS	+= -G 0 -static -n -nostdlib
+MODFLAGS	+= -mlong-calls -fno-common
 
-ifdef CONFIG_DEBUG_INFO
+ifdef CONFIG_REMOTE_DEBUG
 GCCFLAGS	+= -g
 ifdef CONFIG_SB1XXX_CORELIS
 GCCFLAGS	+= -mno-sched-prolog -fno-omit-frame-pointer
@@ -69,13 +69,13 @@ endif
 set_gccflags = $(shell \
 while :; do \
 	cpu=$(1); isa=-$(2); \
-	for gcc_opt in -march= -mcpu=; do \
+	for gcc_opt in -march= -mtune=; do \
 		$(CC) $$gcc_opt$$cpu $$isa -S -o /dev/null \
 			-xc /dev/null > /dev/null 2>&1 && \
 			break 2; \
 	done; \
 	cpu=$(3); isa=-$(4); \
-	for gcc_opt in -march= -mcpu=; do \
+	for gcc_opt in -march= -mtune=; do \
 		$(CC) $$gcc_opt$$cpu $$isa -S -o /dev/null \
 			-xc /dev/null > /dev/null 2>&1 && \
 			break 2; \
@@ -90,7 +90,7 @@ else \
 fi; \
 gas_abi=-Wa,-32; gas_cpu=$$cpu; gas_isa=-Wa,$$isa; \
 while :; do \
-	for gas_opt in -Wa,-march= -Wa,-mcpu=; do \
+	for gas_opt in -Wa,-march= -Wa,-mtune=; do \
 		$(CC) $$gas_abi $$gas_opt$$cpu $$gas_isa -Wa,-Z -c \
 			-o /dev/null -xassembler /dev/null > /dev/null 2>&1 && \
 			break 2; \
@@ -172,6 +172,7 @@ endif
 endif
 
 AFLAGS		+= $(GCCFLAGS)
+ASFLAGS		+= $(GCCFLAGS)
 CFLAGS		+= $(GCCFLAGS)
 
 LD		+= -m $(ld-emul)
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ HPATH   	= $(TOPDIR)/include
 FINDHPATH	= $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net $(HPATH)/math-emu
 
 HOSTCC  	= gcc
-HOSTCFLAGS	= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+HOSTCFLAGS	= -Wall -Wstrict-prototypes -Os -fomit-frame-pointer
 
 CROSS_COMPILE 	=
 
@@ -88,10 +88,9 @@ export MODLIB
 #
 # standard CFLAGS
 #
-
 CPPFLAGS := -D__KERNEL__ -I$(HPATH)
 
-CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
+CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
 	  -fno-strict-aliasing -fno-common
 CFLAGS += -fno-builtin-strpbrk -fno-builtin-sprintf
 ifndef CONFIG_FRAME_POINTER
@@ -108,6 +107,8 @@ CFLAGS += $(call check_gcc,-Wno-pointer-
 # disable stupid and dangerous "optimization" in gcc 3.2+
 CFLAGS += $(call check_gcc,-fno-delete-null-pointer-checks,)
 
+CFLAGS += $(call check_gcc, -funit-at-a-time,)
+
 #
 # ROOT_DEV specifies the default root-device when making the image.
 # This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case