Dirk Behme wrote: > > While preparing U-Boot patches for ARM Cortex A8 based OMAP3 [1], we > found that we use CodeSourcery ARM toolchain [2], and the way we locally > modified main Makefile to use this toolchain is most probably > incompatible with mainline. > > Please find below some diffs what we did locally. > > We now like to discuss/ask what's the best way to align this with > mainline to be able to submit OMAP3 patches? > > Any hints or proposals? > > Many thanks, > > Dirk > > [1] > http://www.sakoman.net/cgi-bin/gitweb.cgi?p=u-boot-omap3.git;a=summary > ('common' branch) > > [2] http://www.codesourcery.com/gnu_toolchains/arm/portal/release313 > > Relevant parts of OMAP3 patch we talk about here (most probably > reformated cause of copy & paste to mailtool, so just for discussion. > Final patches will be sent by git-send-mail). Note the -lgcc_eh which > seems to be CodeSourcery specific, and the -march=armv7a in config.mk. > > diff -uprN uboot_clean/Makefile uboot_beagle/Makefile > --- uboot_clean/Makefile 2008-08-22 19:57:05.000000000 +0200 > +++ uboot_beagle/Makefile 2008-08-22 19:53:52.000000000 +0200 > @@ -141,7 +141,7 @@ ifeq ($(ARCH),ppc) > CROSS_COMPILE = ppc_8xx- > endif > ifeq ($(ARCH),arm) > -CROSS_COMPILE = arm-linux- > +CROSS_COMPILE = arm-none-linux-gnueabi- > endif > ifeq ($(ARCH),i386) > CROSS_COMPILE = i386-linux- > @@ -253,7 +253,7 @@ LIBBOARD = board/$(BOARDDIR)/lib$(BOARD) > LIBBOARD := $(addprefix $(obj),$(LIBBOARD)) > > # Add GCC lib > -PLATFORM_LIBS += -L $(shell dirname `$(CC) $(CFLAGS) > -print-libgcc-file-name`) -lgcc > +PLATFORM_LIBS += -L $(shell dirname `$(CC) $(CFLAGS) > -print-libgcc-file-name`) -lgcc -lgcc_eh
Thanks to the proposals here we fixed this. Just removing -lgcc_eh is the solution :) > ######################################################################### > +## ARM CORTEX Systems > +######################################################################### > +omap3_beagle_config : unconfig > + @$(MKCONFIG) $(@:_config=) arm omap3 beagle omap3 > + > +omap3_overo_config : unconfig > + @$(MKCONFIG) $(@:_config=) arm omap3 overo omap3 > + > +omap3_evm_config : unconfig > + @$(MKCONFIG) $(@:_config=) arm omap3 evm omap3 > + > +######################################################################### > ## XScale Systems > > ######################################################################### > > diff -uprN uboot_clean/cpu/omap3/config.mk uboot_beagle/cpu/omap3/config.mk > --- uboot_clean/cpu/omap3/config.mk 1970-01-01 01:00:00.000000000 +0100 > +++ uboot_beagle/cpu/omap3/config.mk 2008-08-22 19:52:20.000000000 +0200 > @@ -0,0 +1,34 @@ > +# > +# (C) Copyright 2002 > +# Gary Jennejohn, DENX Software Engineering, <[EMAIL PROTECTED]> > +# > <cut GPL> > +# > +PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -ffixed-r8 \ > + -msoft-float > + > +PLATFORM_CPPFLAGS += -march=armv7a Now, the remaining question is what to do with +CROSS_COMPILE = arm-none-linux-gnueabi- +PLATFORM_CPPFLAGS += -march=armv7a we still have above. Checking our code, it seems we need -march=armv7a. Else one file wouldn't compile any more. E.g. replacing armv7a with armv4 results in - a lot of warnings "warning: target CPU does not support interworking" - start.S compilation in our patch fails: start.S: Assembler messages: start.S:466: Error: selected processor does not support `isb' start.S:475: Error: selected processor does not support `clz r5,r4' start.S:500: Error: selected processor does not support `isb' Possible solutions: a) Post patch without modifying CROSS_COMPILE, resulting in usage of arm-linux-. With this, we would locally overwrite CROSS_COMPILE at command line with toolchain we like. I'm not sure if the standard arm-linux- toolchain used for "make all" supports -march=armv7a, though. b) Introduce something like new ifeq ($(ARCH),cortex-arm) CROSS_COMPILE = arm-none-linux-gnueabi- endif I don't know if this would be accepted and how to do it cleanly, though. c) More? Any hints and proposals are welcome! Thanks, Dirk _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
