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

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diff -ur linux-2.4.32/arch/mips/Makefile linux-2.4.32-openwrt/arch/mips/Makefile
--- linux-2.4.32/arch/mips/Makefile 2005-12-15 13:53:59.000000000 +0100
+++ linux-2.4.32-openwrt/arch/mips/Makefile 2005-12-15 14:02:33.000000000 +0100
@@ -44,10 +44,10 @@
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 @@
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 @@
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
AFLAGS += $(GCCFLAGS)
+ASFLAGS += $(GCCFLAGS)
CFLAGS += $(GCCFLAGS)
LD += -m $(ld-emul)
diff -ur linux-2.4.32/Makefile linux-2.4.32-openwrt/Makefile
--- linux-2.4.32/Makefile 2005-12-15 13:53:59.000000000 +0100
+++ linux-2.4.32-openwrt/Makefile 2005-12-15 13:59:30.000000000 +0100
@@ -17,7 +17,7 @@
FINDHPATH = $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net $(HPATH)/math-emu
HOSTCC = gcc
-HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Os -fomit-frame-pointer
CROSS_COMPILE =
@@ -88,10 +88,9 @@
#
# standard CFLAGS
#
-
CPPFLAGS := -D__KERNEL__ -I$(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-sprintf
ifndef CONFIG_FRAME_POINTER
@@ -104,6 +103,8 @@
# disable pointer signedness warnings in gcc 4.0
CFLAGS += $(call check_gcc,-Wno-pointer-sign,)
+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