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When compiling gcc-runtime for i686 libatomic, libgomp and libitm are compiled with additional '-march' and '-mtune' overrides. This typically does not cause build errors (e.g. core2-32 tune), and results in less optimally tuned outputs. However with specific TUNE_CCARGS (e.g. has '-mfpmath=sse' but not '-msse*'), the build errors with conflicting '-mfpmath' options. This is caused by gcc-runtime specific configure scripts and Makefile options that override by adding additional '-march'/'-mtune' args. OE builds gcc-runtime differently to other build systems, and provides target specific arch/tune options directly. As such, this change adds a patch for gcc to remove the specific cases where the args are added. (From OE-Core rev: d39b686cc5fcc89405ffeb560ea64b5d305b0608) Signed-off-by: Nathan Rossi <nathan@nathanrossi.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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.