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authorGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2012-09-04 04:09:54 +0000
committerGravatar Peter Korsgaard <jacmet@sunsite.dk>2012-09-04 22:03:55 +0200
commit8e55f03a545e12ef3c149541b8aa25b31c3e927a (patch)
treeb15e3019aed6ff697b7b09d54d2cb7165eb8d2ef /toolchain
parenta9df50486c0e5a7a36531aacf49c2a57ac21c7fe (diff)
downloadbuildroot-8e55f03a545e12ef3c149541b8aa25b31c3e927a.tar.gz
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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 'toolchain')
-rw-r--r--toolchain/uClibc/uclibc.mk7
1 files changed, 3 insertions, 4 deletions
diff --git a/toolchain/uClibc/uclibc.mk b/toolchain/uClibc/uclibc.mk
index 583d199ffc..534550a07a 100644
--- a/toolchain/uClibc/uclibc.mk
+++ b/toolchain/uClibc/uclibc.mk
@@ -37,7 +37,6 @@ UCLIBC_TARGET_ARCH:=$(shell $(SHELL) -c "echo $(ARCH) | sed \
-e 's/v850.*/v850/g' \
-e 's/sh[234].*/sh/' \
-e 's/mips.*/mips/' \
- -e 's/mipsel.*/mips/' \
-e 's/cris.*/cris/' \
-e 's/xtensa.*/xtensa/' \
")
@@ -142,13 +141,13 @@ ifeq ($(UCLIBC_TARGET_ARCH),mips)
/bin/echo "# CONFIG_MIPS_ISA_MIPS32R2 is not set"; \
/bin/echo "# CONFIG_MIPS_ISA_MIPS64 is not set"; \
) >> $(UCLIBC_DIR)/.oldconfig
-ifeq ($(BR2_MIPS_OABI),y)
+ifeq ($(BR2_MIPS_OABI32),y)
$(SED) 's/.*\(CONFIG_MIPS_O32_ABI\).*/\1=y/' $(UCLIBC_DIR)/.oldconfig
endif
-ifeq ($(BR2_MIPS_ABI32),y)
+ifeq ($(BR2_MIPS_NABI32),y)
$(SED) 's/.*\(CONFIG_MIPS_N32_ABI\).*/\1=y/' $(UCLIBC_DIR)/.oldconfig
endif
-ifeq ($(BR2_MIPS_ABI64),y)
+ifeq ($(BR2_MIPS_NABI64),y)
$(SED) 's/.*\(CONFIG_MIPS_N64_ABI\).*/\1=y/' $(UCLIBC_DIR)/.oldconfig
endif
ifeq ($(BR2_mips_1),y)