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* ARM: compiler options cleanup - improve tool chain supportWolfgang Denk2009-08-21-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For some time there have been repeated reports about build problems with some ARM (cross) tool chains. Especially issues about (in)compatibility with the tool chain provided runtime support library libgcc.a caused to add and support a private implementation of such runtime support code in U-Boot. A closer look at the code indicated that some of these issues are actually home-made. This patch attempts to clean up some of the most obvious problems and make building of U-Boot with different tool chains easier: - Even though all ARM systems basicy used the same compiler options to select a specific ABI from the tool chain, the code for this was distributed over all cpu/*/config.mk files. We move this one level up into lib_arm/config.mk instead. - So far, we only checked if "-mapcs-32" was supported by the tool chain; if yes, this was used, if not, "-mabi=apcs-gnu" was selected, no matter if the tool chain actually understood this option. There was no support for EABI conformant tool chains. This patch implements the following logic: 1) If the tool chain supports "-mabi=aapcs-linux -mno-thumb-interwork" we use these options (EABI conformant tool chain). 2) Otherwise, we check first if "-mapcs-32" is supported, and then check for "-mabi=apcs-gnu" If one test succeeds, we use the first found option. 3) In case 2), we also test if "-mno-thumb-interwork", and use this if the test succeeds. [For "-mabi=aapcs-linux" we set "-mno-thumb-interwork" mandatorily.] This way we use a similar logic for the compile options as the Linux kernel does. - Some EABI conformant tool chains cause external references to utility functions like raise(); such functions are provided in the new file lib_arm/eabi_compat.c Note that lib_arm/config.mk gets parsed several times, so we must make sure to add eabi_compat.o only once to the linker list. Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Dirk Behme <dirk.behme@googlemail.com> Cc: Magnus Lilja <lilja.magnus@gmail.com> Cc: Tom Rix <Tom.Rix@windriver.com> Cc: Prafulla Wadaskar <prafulla@marvell.com> Acked-by: Sergey Kubushyn <ksi@koi8.net> Tested-by: Magnus Lilja <lilja.magnus@gmail.com> Tested-by: Andrzej Wolski <awolski@poczta.fm> Tested-by: Gaye Abdoulaye Walsimou <walsimou@walsimou.com> Tested-by: Tom Rix <Tom.Rix@windriver.com> Tested-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* Fix e-mail address of Gary Jennejohn.Detlev Zundel2009-05-15-1/+1
| | | | Signed-off-by: Detlev Zundel <dzu@denx.de>
* Remove compiler warning: target CPU does not support interworkingSergei Poselenov2008-12-13-0/+1
| | | | | | | This warning is issued by modern ARM-EABI GCC on non-thumb targets. Signed-off-by: Vladimir Panfilov <pvr@emcraft.com> Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
* Update ARM Integrator boards:Wolfgang Denk2005-10-04-1/+0
| | | | | | | Correct addessing errors in platform files. Split off common core module data from Integrator header files to include/armcoremodule.h. Patch by Peter Pearse, 04 Oct 2005
* Make sure only supported compiler options are usedWolfgang Denk2005-10-04-2/+10
| | | | | | Import "cc-option" shell function from kernel and use it to get the correct ARM GCC options for individual CPUs Patch by Peter Pearse, 30 Jun 2005
* Initial revisionwdenk2002-09-05-0/+27