Changqing Li 63371ee4ec gcc-runtime: fix C++ header mapping for n32/x32 tune
The SDK was unable to find the C++ header pieces correctly since it's
using a generic compiler, not one specifically targeting the multilib
vendor prefix and default tune.  This adds the right mapping to ensure
SDKs work as expected. And fix problem in below configurations:

multilib configuration 1:
MACHINE="qemumips64"
MULTILIBS ?= "multilib:lib32 multilib:libn32"
DEFAULTTUNE_virtclass-multilib-lib32 ?= "mips"
DEFAULTTUNE_virtclass-multilib-libn32 ?= "mips64-n32"
MULTILIB_GLOBAL_VARIANTS_append = " libn32"
require conf/multilib.conf

ignoring nonexistent directory "<path>/sysroots/mips64-poky-linux/usr/include/c++/8.2.0/mips64-poky-linux/32

multilib configuration 2:
MACHINE="qemumips64"
MULTILIBS = 'multilib:lib64 multilib:lib32'
DEFAULTTUNE = 'mips64-n32'
DEFAULTTUNE_virtclass-multilib-lib64 = 'mips64'
DEFAULTTUNE_virtclass-multilib-lib32 = 'mips32r2'
require conf/multilib.conf

For this configuration:
for target gcc-runtime, need to create symlink like mips64-poly-linux --> mips64-poky-linux-gnu32
for target lib64-gcc-runtime, need to create symlink like mips64-poly-linux/32 --> mips64-pokymllib64-linux
in order to avoid conflict during populate_sdk, create symlink for subfoler bits/ext for target gcc-runtime,
this is ugly, but seems no better way to cover all kinds of configuration.

single lib configuration:
MACHINE="qemumips64"
DEFAULTTUNE = "mips64-n32"

(From OE-Core rev: b071a1a209556158bcfcc20e3c8bd4b15373767c)

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2019-06-19 12:46:44 +01:00
2018-02-24 10:31:45 +00:00

QEMU Emulation Targets
======================

To simplify development, the build system supports building images to
work with the QEMU emulator in system emulation mode. Several architectures
are currently supported in 32 and 64 bit variants:

  * ARM (qemuarm + qemuarm64)
  * x86 (qemux86 + qemux86-64)
  * PowerPC (qemuppc only)
  * MIPS (qemumips + qemumips64)

Use of the QEMU images is covered in the Yocto Project Reference Manual.
The appropriate MACHINE variable value corresponding to the target is given
in brackets.
Description
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