openwrtv3/openwrt/target/linux/linux-2.4/patches/generic/006-extra_optimization.patch

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--- linux-2.4.30/Makefile 2005-10-23 20:52:56.813948000 +0200
+++ linux.dev/Makefile 2005-10-23 20:53:12.482927250 +0200
@@ -89,6 +89,8 @@
# standard CFLAGS
#
+check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
+
CPPFLAGS := -D__KERNEL__ -I$(HPATH)
CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
@@ -100,6 +102,12 @@
endif
AFLAGS := -D__ASSEMBLY__ $(CPPFLAGS)
+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