NetCube-Systems-Austria/kumquat-buildroot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

toolchain-buildroot: allow to build ppc64(le) musl toolchains

Browse Source 
Latest musl release supports ppc64 architecture (both big endian and
little endian), so this commit adds support for this.

Since musl implements the ELFv2 ABI for both big-endian and
little-endian PowerPC64, we have to force using this ABI on PowerPC64
big endian (normally elfv1 is the default).

Also, only gcc 6.x has the necessary changes to support musl on PowerPC
64, so we restrict the gcc version selection accordingly.

Tested with Qemu for big endian and little endian configurations.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
[Thomas: add comment about the ABI flag in gcc.mk, rework commit log.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Waldemar Brodkorb 2016-08-18 08:37:29 +02:00 committed by Thomas Petazzoni
parent 2970711de7
commit 5ab751ca44
3 changed files with 19 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
package/gcc/Config.in.host
View File

@ -30,6 +30,8 @@ choice
depends on !BR2_x86_jaguar && !BR2_x86_steamroller
# Unsupported for MIPS R6
depends on !BR2_mips_32r6 && !BR2_mips_64r6
# musl ppc64 unsupported
depends on !BR2_powerpc64 && !BR2_powerpc64le && BR2_TOOLCHAIN_USES_MUSL
select BR2_GCC_NEEDS_MPC
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
@ -46,6 +48,8 @@ choice
depends on !((BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el) && BR2_BINUTILS_VERSION_2_25_X)
# Unsupported for MIPS R6
depends on !BR2_mips_32r6 && !BR2_mips_64r6
# musl ppc64 unsupported
depends on !BR2_powerpc64 && !BR2_powerpc64le && BR2_TOOLCHAIN_USES_MUSL
select BR2_GCC_NEEDS_MPC
select BR2_GCC_SUPPORTS_GRAPHITE
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
@ -66,6 +70,8 @@ choice
depends on !BR2_cortex_a17
# Unsupported for MIPS R6
depends on !BR2_mips_32r6 && !BR2_mips_64r6
# musl ppc64 unsupported
depends on !BR2_powerpc64 && !BR2_powerpc64le && BR2_TOOLCHAIN_USES_MUSL
# PR60102 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60102
select BR2_GCC_NEEDS_MPC
select BR2_GCC_SUPPORTS_GRAPHITE
@ -75,6 +81,8 @@ choice
bool "gcc 5.x"
# Broken or unsupported architectures
depends on !BR2_arc && !BR2_bfin
# musl ppc64 unsupported
depends on !BR2_powerpc64 && !BR2_powerpc64le && BR2_TOOLCHAIN_USES_MUSL
select BR2_GCC_NEEDS_MPC
select BR2_GCC_SUPPORTS_GRAPHITE
select BR2_TOOLCHAIN_GCC_AT_LEAST_5

10
package/gcc/gcc.mk
View File

@ -231,6 +231,16 @@ HOST_GCC_COMMON_CONF_OPTS += \
--with-long-double-128
endif
# PowerPC64 big endian by default uses the elfv1 ABI, and PowerPC 64
# little endian by default uses the elfv2 ABI. However, musl has
# decided to use the elfv2 ABI for both, so we force the elfv2 ABI for
# Power64 big endian when the selected C library is musl.
ifeq ($(BR2_TOOLCHAIN_USES_MUSL)$(BR2_powerpc64),yy)
HOST_GCC_COMMON_CONF_OPTS += \
--with-abi=elfv2 \
--without-long-double-128
endif
HOST_GCC_COMMON_TOOLCHAIN_WRAPPER_ARGS += -DBR_CROSS_PATH_SUFFIX='".br_real"'
ifeq ($(BR2_GCC_ARCH_HAS_CONFIGURABLE_DEFAULTS),)
ifeq ($(call qstrip,$(BR2_GCC_TARGET_CPU_REVISION)),)

2
toolchain/toolchain-buildroot/Config.in
View File

@ -70,7 +70,7 @@ config BR2_TOOLCHAIN_BUILDROOT_MUSL
bool "musl"
depends on BR2_aarch64 || BR2_arm || BR2_armeb || BR2_i386 || \
BR2_microblaze || BR2_mips || BR2_mipsel || BR2_powerpc || \
BR2_sh || BR2_x86_64
BR2_powerpc64 || BR2_powerpc64le || BR2_sh || BR2_x86_64
depends on !BR2_powerpc_SPE # not supported, build breaks
# Unsupported for MIPS R6
depends on !BR2_mips_32r6 && !BR2_mips_64r6