(I'm re-sending this mail becuase my previous did not apper on the ML thread.)
Hello Simon > Further to this one - here is my full buildman output. There are a few > PPC problems also: Your close check is highly appreciated. Thanks! > 29: Makefile: move more flags to the top Makefile > powerpc: + rainier_nand glacier_nand canyonlands_nand > sequoia_nand haleakala_nand kilauea_nand acadia_nand bamboo_nand > 30: Makefile: refactor include path settings > 31: Makefile: move more stuff to top Makefile > powerpc: rainier_nand glacier_nand canyonlands_nand sequoia_nand > haleakala_nand kilauea_nand acadia_nand bamboo_nand It looks like nand_spl boards are broken at 29 and fixed at 31. I will fix this problem at v2. > 34: Kbuild: change out-of-tree building > sandbox: + sandbox > blackfin: bf561-acvilon cm-bf537u > 35: Kbuild: add dummy obj-y to create built-in.o > 36: Makefile: rename scripts/Makefile.build to scripts/Makefile.build.tmp > 37: Kbuild: import more build scripts from Linux v3.12 tag > 38: Kbuild: use Linux Kernel build scripts > sandbox: sandbox > blackfin: + bf561-acvilon cm-bf537u Sandbox is broken at 34 and fixed at 38. I will fix this problem too at v2. buildman is also reporting something about bf561-acvilon and cm-bf537u. But as long as I tested, I believe it is unrelated to Kbuild. Sonic Zhang posted some patches to fix errors/warnings of Blackfin boards. Please check this again after u-boot-blackfin/mater is merged. > > What will happen with the 'FIX ME's that are generated? e.g.: I mentioned about My Next Plan in this covor letter. I want to refactor more makefiles lator including such as "FIX ME" or "TODO" items. > > +# FIX ME > > +ifneq ($(filter lib lib/lzma lib/zlib, $(obj)),) > > +ccflags-y := -O2 > > +endif I was thinking to do something about this after Kconfig. Some Blackfin, M68K boards want to compile lib, lib/lzma, lib/zlib with -O2 option and other sources with -Os option. I think this feature is WANT, not MUST. If this feature deserves maintainance, how about adding new CONFIG macro like this? config CC_OPTIMIZE_LIBS_FOR_SPEED bool "Optimize libraries for speed" help Enabling this option will pass "-O2" when compiling C sources under lib/ directory even if -Os is given to the whole sources. If unsure, say N. And add the following line to lib/Makefile. subdir-ccflags-$(CONFIG_OPTIMIZE_LIBS_FOR_SPEED) += -O2 > Have you done any comparison on build times? Do you mean Kbuild is slower than U-Boot conventional build system? Best Regards Masahiro Yamada _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot