On Thu, Aug 22, 2013 at 12:45:24AM -0700, Tony Lindgren wrote: > * Chen Gang <gang.chen@xxxxxxxxxxx> [130821 01:53]: > > Hello Maintainers: > > > > When build arm with allmodconfig under ubuntu i386 with arm-linux- > > gnueabi-gcc 4.7, as 2.22, it report the errors. > > > > Please help check, thanks (the related config file in attachment). > > It seems that some make flags may need to be specified separately > in some makefiles. See the following for some examples: > > $ find arch/arm -name Makefile | xargs grep -i flags > > I'm getting different errors though, I'm getting: > > arch/arm/mach-zynq/hotplug.c:1: error: bad value (cortex-a9) for -mcpu= switch > > As probably my compiler does not support the cortex-a9 switch, > I have gcc version 4.3.5 (Debian 4.3.5-4), tried with v3.11-rc5. The use of -mcpu with -march is not a good idea anyway - you either use -mcpu= or you use -march and -mtune. -mcpu= sets the CPU type, which specifies the instruction architecture (iow, which instructions can be used) and instruction scheduling behaviour. -march= sets the architecture only. -mtune= sets the instruction scheduling behaviour only. So, that -mcpu= should probably be -mtune=, but if that fails due to unrecognised instructions, the -march= parameter is wrong. Even so, if gcc 4.3.5 doesn't support cortex-a9 as a CPU type, and we want to support that gcc version, the setting of -mtune needs to be conditionalised. As it is only a scheduling hint, it's probably fine for it to end up being omitted. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
