Oops, I meant to post this to buildroot list, sorry! Please ignore it here! -R
On Fri, Jul 13, 2007 at 09:42:47AM -0400, Ralph Siemsen wrote: > > Short: > > The gcc -mfloat-abi option should only be passed for ARM builds > unless I am mis-reading the gcc documentation... > > Long: > > When I build a toolchain for powerpc with buildroot (current SVN) > this results in a compiler that doesn't accept -mfloat-abi option: > > # $(STAGING_DIR)/usr/bin/powerpc-linux-uclibc-gcc --version > powerpc-linux-uclibc-gcc (GCC) 4.2.0 > Copyright (C) 2007 Free Software Foundation, Inc. > This is free software; see the source for copying conditions. There is NO > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. > > # $(STAGING_DIR)/usr/bin/powerpc-linux-uclibc-gcc -mfloat-abi test.c > cc1: error: unrecognized command line option "-mfloat-abi" > > The failure is observed while compiling openssl. Its makefile does: > $(SED) 's,/CFLAG=,/CFLAG= $(TARGET_SOFT_FLOAT) ,g' \ > $(OPENSSL_DIR)/Configure > where TARGET_SOFT_FLOAT comes from toolchain/gcc/Makefile.in: > ifeq ($(findstring x4.,x$(GCC_VERSION)),x4.) > SOFT_FLOAT_CONFIG_OPTION:=--with-float=soft > ifeq ($(BR2_SOFT_FLOAT_FP),y) > TARGET_SOFT_FLOAT:=-mfloat-abi=softfp > else # no fp at all > TARGET_SOFT_FLOAT:=-mfloat-abi=soft > #endif > else # not gcc-4.x > TARGET_SOFT_FLOAT:=-msoft-float > endif > > So if using gcc4x then -mfloat-abi is passed unconditionally. > (And, because BR2_SOFT_FLOAT_FP is commented out in Config.in, > the value "soft" is always chosen, never "softfp", but that's > not my issue at the moment). > > I believe the gcc4 check in toolchain/gcc/Makefile.in should > only set the -mfloat-abi for ARM architecture. I can try cobbling > together a patch for this, but as I am not entirely sure it is > the right answer, I thought I'd get some feedback first. > > Thanks, > -R _______________________________________________ busybox mailing list [email protected] http://busybox.net/cgi-bin/mailman/listinfo/busybox
