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-fexpensive-optimizations is enabled by default at -O2 -fomit-frame-pointer is enabled at -O2 selectively by gcc depending upon architecture if debug info is not hurt -frename-registers - This might have some performance advantage on top of O2 on architectures which have more registers and registers are left after scheduling but it affects debuggability quite a bit so as a i tradeoff we do not use it. -feliminate-dwarf2-dups - We use this option to reduce the size of debug information by removing duplicates this is only valid for dwarf2+ and we use dwarf2 by default -pipe uses buffers instead of temporary files internally it can speed up compilation it has has issues with other assemblers but not with GNU assembler and we use gas. Separate out debug information related flags into a separate variable DEBUG_FLAGS so distros can use/notuse them as they like (From OE-Core rev: 9cb7113790d716a4c5cf7d511535ba87fdecd1ac) Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
Poky platform builder is a combined cross build system and development environment. It features support for building X11/Matchbox/GTK based filesystem images for various embedded devices and boards. It also supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK with IDE integration.
Poky has an extensive handbook, the source of which is contained in the handbook directory. For compiled HTML or pdf versions of this, see the Poky website http://pokylinux.org.
Additional information on the specifics of hardware that Poky supports is available in README.hardware.