Sascha,
-----Original Message----- From: Sascha Hauer [mailto:s.hauer@pengutronix.de] Sent: Monday, May 12, 2008 8:44 AM To: Menon, Nishanth Cc: u-boot-users@lists.sourceforge.net Subject: Re: [Patch 1/2] U-Boot-V2: ARM: Makefile cleaup
+AFLAGS += -msoft-float -Os
Assemblers don't know about soft-float and size optimisation. This patch only works because AFLAGS is unused. Besides, you shouldn't use floating point througout U-Boot anyway.
I agree on the -Os being unused. On -msoft-float without the same in AFLAGS: arm-none-eabi-ld: ERROR: arch/arm/mach-omap/omap3_clock.o uses hardware FP, whereas arch/arm/mach-omap/built-in.o uses software FP arm-none-eabi-ld: failed to merge target specific data of file arch/arm/mach-omap/omap3_clock.o make[1]: *** [arch/arm/mach-omap/built-in.o] Error 1 make: *** [arch/arm/mach-omap] Error 2
Ideally the gcc flags should be set per platform -> Linux kernel has a neat manner of doing it. We can move ahead with h/w FP as long as we allow flags to be set for platform. Currently though, if C files are compiled with -msoft-float, so should AFLAGS. Probably we need some new management of compiler flags?
Regards, Nishanth Menon