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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2012-09-04 04:09:54 +0000 |
|---|---|---|
| committer | Peter Korsgaard <jacmet@sunsite.dk> | 2012-09-04 22:03:55 +0200 |
| commit | 8e55f03a545e12ef3c149541b8aa25b31c3e927a (patch) | |
| tree | b15e3019aed6ff697b7b09d54d2cb7165eb8d2ef /package/Makefile.in | |
| parent | a9df50486c0e5a7a36531aacf49c2a57ac21c7fe (diff) | |
| download | buildroot-novena-8e55f03a545e12ef3c149541b8aa25b31c3e927a.tar.gz buildroot-novena-8e55f03a545e12ef3c149541b8aa25b31c3e927a.zip | |
Clarify MIPS ABIs support
Practically speaking, MIPS has three useful ABIs:
* o32 is for 32-bits CPUs, or 64-bit CPUs running only a 32-bit subset
of the instruction set.
* n32 is for 64-bits CPUs only. It has 32-bits pointers and long
integers.
* n64 is for 64-bits CPUs only. It has 64-bits pointers and long
integers.
See http://www.linux-mips.org/wiki/MIPS_ABI_History and
http://www.linux-mips.org/wiki/WhatsWrongWithO32N32N64 for more
details.
So, this commit reworks the Buildroot MIPS support by:
* Add separate mips64/mips64el top-level architectures.
* Renaming the n32 ABI option to BR2_MIPS_NABI32, for consistency
with BR2_MIPS_OABI32.
* Renaming the n64 ABI option to BR2_MIPS_NABI64, for consistency
with BR2_MIPS_OABI32.
* Make the n32 and n64 ABI selections select the BR2_ARCH_IS_64,
since those ABIs are valid on 64-bits CPUs only.
* Removing the o64 ABI, which is practicaly never used.
* Removing the "none" ABI, which really doesn't make sense.
* Introduce the mips64 and mips64el architecture names when a 64-bits
MIPS ABI is choosen. This will fix build issue like
http://autobuild.buildroot.org/results/9b8c5ea86c953a89e85e7b67e9221de41773f652/build-end.log
where gmp was confused by the fact of having a 32 bits architecture
(detected by the mips- architecture part of the tuple) but 64 bits
integer size when compiling.
* Adjust the uclibc.mk logic to support the new mips64/mips64el
architecture names, and take into account the renaming of the ABI
options.
This has been build tested by generating Buildroot toolchains and
compiling a few packages for MIPS o32, MIPS n32 and MIPS n64.
This work is originally based on prior work done by Gustavo Zacarias.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Diffstat (limited to 'package/Makefile.in')
| -rw-r--r-- | package/Makefile.in | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/package/Makefile.in b/package/Makefile.in index 6fad224ba..21b8634d7 100644 --- a/package/Makefile.in +++ b/package/Makefile.in @@ -87,7 +87,7 @@ endif TARGET_CFLAGS=$(TARGET_ABI) $(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING) -ifeq ($(findstring yy,$(BR2_mips)$(BR2_MIPS_ABI64)),yy) +ifeq ($(findstring yy,$(BR2_mips)$(BR2_MIPS_NABI64)),yy) TARGET_CFLAGS+=-fno-pic -mno-abicalls endif |