On Tue, Feb 04, 2014 at 05:24:07PM +0900, Masahiro Yamada wrote:
> We switched to Kbuild style makefiles at v2014.01-rc1 release.
> With that modification, we can write makefiles simpler.
> But it is NOT real Kbuild. We need more progress.
>
> As the next step, this series imports (+ adjusts) build scripts
> from Linux Kernel under scripts/ directory.
> By applying this series, we can get more advantages:
> - short log
> - perfect dependency tracking
> - preparation to the next step, Kconfig
> - other things...
>
> Kbuild without Kconfig
> ----------------------
>
> First of all, to make things clearer, let me explain
> the difference between "Kbuild" and "Kconfig".
> They are, I think, sometimes confusing.
>
> Kbuild - build system used for Linux Kernel.
> Some features of Kbuild are:
>
> (a) We can describe makefiles simply.
> Just add objects to "obj-y" like this:
> obj-$(CONFIG_FOO) += foo.o
>
> (b) We can describe directory descending nicely.
> Add directories with a slash to "obj-y" like this:
> obj-$(CONFIG_BAR) += bar/
>
> (c) Short log like follows:
> CC common/foo.o
> CC common/bar.o
> LD common/built-in.o
>
> (d) Perfect dependency tracking
> I think this is the biggest advantage.
> To be honest, the dependency tracing of U-Boot build system
> was not reliable.
>
> Kconfig - A tool to manage CONFIG macros.
> We can handle the dependency among CONFIG macros.
> Kconfig allows us to modify CONFIG settings easily
> by "make config".
> GUI interface are also available by "make menuconfig"
> All defined CONFIG macros are stored into ".config" file
>
> I think most of U-boot developers are already familiar with above.
> (In most cases, they are Linux Kernel developers too.)
>
> I definitely want to port both of these, but I want to do them separately:
> Kbuild first.
> (If we do Kbuild and Kconfig at the same time, it might be messed up.)
>
> So, I want to do "Kbuild without Kconfig" in this series.
> The conventional tool (mkconfig + boards.cfg file)
> is used for board configuration.
>
> How to apply ?
> --------------
>
> I confirmed this series can apply on commit 0876703cf.
>
> How to Build ?
> --------------
>
> We can build the same as before.
> Do board configuraton first and then run "make".
>
> $ make omap4_panda_config
> Configuring for omap4_panda board...
> $ make CROSS_COMPILE=arm-linux-gnueabi-
> GEN include/autoconf.mk.dep
> GEN include/autoconf.mk
> CC lib/asm-offsets.s
> GEN include/generated/generic-asm-offsets.h
> CC arch/arm/cpu/armv7/omap4/asm-offsets.s
> GEN include/generated/asm-offsets.h
> HOSTCC scripts/basic/fixdep
> ...
>
> You will find a difference at a glance: short log.
> If you need detail log message, please add "V=1".
> (You can also use "V=2")
>
> Please note we can no longer use
> $ make omap4_panda CROSS_COMPILE=arm-linux-gnueabi-
> to do board configuration and "make" at the same time.
>
> Instead, we can use Kbuild-ish way for that purpose:
> $ make omap4_panda_config all CROSS_COMPILE=arm-linux-gnuabi-
>
> This series keeps the other features:
>
> - Support out-of-tree build
> You can use "O=<dir_name>" like this
> $ mkdir build_dir
> $ make omap4_panda_config all O=build_dir
> CROSS_COMPILE=arm-linux-gnueabi-
>
> - Works with parallel make option
> Add "-j" option for this. Compiling will get faster.
>
> - Of cource, SPL, TPL build are supported
> (nand_spl also works. But "nand_spl" is obsolete and we should switch to
> "spl".
> Until when should we continue to maintain nand_spl?)
>
> - Breaks no boards (except some boards which are already broken)
> I built all target boards to prove correctness of this series
> at least for compile test.
>
> My Next Plan
> ------------
>
> - Import Kconfig
> Use "make config", "make menuconfig", "make defconfig", etc. in U-Boot.
>
> - More refactoring
> Some parts of makefiles are still dirty.
> I want to refactor more makefiles in follow-up patches.
>
> - Use "obj-m" for standalone program?? Loadable module??
> I have not deceided about this yet.
>
> Note
> ----
>
> - I marked dirty parts with "FIX ME".
>
> In some board-specific config.mk files.
> # FIX ME
> ifneq ($(filter lib lib/lzma lib/zlib, $(obj)),)
> ccflags-y := -O2
> endif
>
> In the top Makefile
> # FIX ME
> cpp_flags := $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(UBOOTINCLUDE)
> $(NOSTDINC_FLAGS)
> c_flags := $(KBUILD_CFLAGS) $(cpp_flags)
>
> I will re-write them more nicely after other parts are prepared.
>
> Run Test
> --------
>
> - Tested for MPC5121 on an ifm AC14xx board,
> Beagle (C4) board and Wand (quad) board by Gerhard Sittig
>
> - Tested for Zynq ZC706 board by me
>
> Run test report for your board is welcome!
>
> Changes for v9:
> - Refactor "clean" and "clobber" rule
> - Move the build rules of include/autoconf.mk and include/autoconf.mk.dep
>
> Changes for v8:
> - Rebase on commit 0876703c.
> - Fix a typo in comment in 38/38
>
> Changes for v7:
> - Fix a bug in spl build:
> In v6, build failed if we try to build another SPL board
> without doing "make clobber".
> For example,
> $ make omap3_beagle_config
> $ make CROSS_COMPILE=<your_gcc_prefix>
> $ make am335x_evm_config
> $ make CROSS_COMPILE=<your_gcc_prefix>
> This failed in v6. We needed either "make clobber" or "make mrproper"
> before switching to another board.
> Now, we can two or more boards continuously.
>
> Changes for v6:
> - Rebase on the current u-boot/master
> - Linux Kernel 3.13 was released on Jan. 20, so import build scripts
> from v3.13 to be breeding edge.
> - Minor change in post/lib_powerpc/fpu/Makefile
> - Include cmd_files under nand_spl/board/*/*/Makefile
>
> Changes for v5:
> - Fix a bug reported by Gerhard Sittig:
> "make tools" before running "make" failed at v4.
> - Revive "env" target so that we can build only under tools/env/.
> - Add a new patch at the tail:
> 38/38 "tools/env: cross-compile fw_printenv without setting HOSTCC"
> - Describe "clobber" target shortly by deleteing "*.imx" and "*.map"
> with wildcard matching.
> - Rebase on the current u-boot/master
>
> Changes for v4:
> - Add a new patch at the tail:
> 37/37 "kbuild: Do not generate .*.su files at the top directory"
> - Change "checkstack" target to Kbuild style
> - Move the line where U_BOOT_VERSION is defined
>
> Changes for v3:
> - Rebase on the current u-boot/master
> - Add a new patch at the tail:
> 36/36 "board: sandburst: delete FORCEBUILD"
>
> Changes for v2:
> - At version 1, nand_spl boards got broken at 12 and fixed at 14.
> Fix this problem
> - At version 1, sandbox got broken at 17 and fixed at 21.
> Fix this problem
> - Add a new patch at the tail:
> 35/35 "Kbuild: chech clean source and generate Makefile for out-of-tree
> build"
> - Rebase on v2014.01-rc2 tag
>
>
> Masahiro Yamada (38):
> .gitignore: ingore files generated by Kbuild
> Makefile.host.tmp: add a new script to refactor tools
> tools: convert makefiles to kbuild style
> board: samsung: refactor host programs
> examples: Use scripts/Makefile.build
> nand-spl: Use scripts/Makefile.build
> Makfile: move suffix rules to Makefile.build
> Makefile: move some variable definitions to the top Makefile
> Makefile: move BFD_ROOT_DIR to tools/gdb/Makefile
> kbuild: import Kbuild.include from linux v3.13 tag
> kbuild: Use Kbuild.include
> Makefile: move more flags to the top Makefile
> Makefile: refactor include path settings
> Makefile: move more stuff to top Makefile
> Makefile: move some flags to spl/Makefile
> Makefile: move some flags to examples makefiles
> kbuild: change out-of-tree build
> kbuild: add dummy obj-y to create built-in.o
> Makefile: rename scripts/Makefile.build to scripts/Makefile.build.tmp
> kbuild: import more build scripts from Linux v3.13 tag
> kbuild: use Linux Kernel build scripts
> kbuild: delete temporary build scripts
> kbuild: move some lines to more suitable place
> kbuild: convert some make rules to Kbuild style
> kbuild: move include directives of board configuration files
> kbuild: generate {spl,tpl}-autoconf.mk only when it is necessary
> Makefile: remove a cleaning target "tidy"
> kbuild: change the top Makefile to more Kbuild-ish structure
> examples: move api/ and standalone/ entry to examples/Makefile
> kbuild: refactor Makefile and spl/Makefile more
> Makefile: Do not pass MTD_VERSION from the top Makefile
> Makefile: refactor tools-all targets
> kbuild: use scripts/Makefile.clean
> kbuild: support simultaneous board configuration and "make all"
> kbuild: check clean source and generate Makefile for out-of-tree build
> board: sandburst: delete FORCEBUILD
> kbuild: Do not generate .*.su files at the top directory
> tools/env: cross-compile fw_printenv without setting HOSTCC
>
> .gitignore | 30 +-
> MAKEALL | 8 +-
> Makefile | 1299
> +++++++++++++-------
> arch/arm/cpu/arm1136/config.mk | 2 +-
> arch/arm/cpu/arm926ejs/config.mk | 2 +-
> arch/arm/cpu/arm926ejs/davinci/config.mk | 2 +-
> arch/arm/cpu/armv7/am33xx/config.mk | 2 +-
> arch/arm/cpu/armv7/config.mk | 2 +-
> arch/arm/cpu/armv7/omap3/config.mk | 2 +-
> arch/arm/cpu/armv7/omap4/config.mk | 2 +-
> arch/arm/cpu/armv7/omap5/config.mk | 2 +-
> arch/arm/cpu/armv7/socfpga/config.mk | 2 +-
> arch/arm/cpu/armv7/tegra114/Makefile | 3 +-
> arch/arm/cpu/armv7/tegra30/Makefile | 3 +-
> arch/arm/imx-common/Makefile | 2 +-
> arch/blackfin/config.mk | 10 +-
> arch/blackfin/cpu/Makefile | 10 +-
> arch/blackfin/lib/Makefile | 5 +-
> arch/m68k/cpu/mcf5227x/Makefile | 2 +-
> arch/m68k/cpu/mcf523x/Makefile | 2 +-
> arch/m68k/cpu/mcf52x2/Makefile | 2 +-
> arch/m68k/cpu/mcf532x/Makefile | 2 +-
> arch/m68k/cpu/mcf5445x/Makefile | 2 +-
> arch/m68k/cpu/mcf547x_8x/Makefile | 2 +-
> arch/mips/cpu/mips32/config.mk | 2 +-
> arch/mips/cpu/mips64/config.mk | 2 +-
> arch/mips/cpu/xburst/config.mk | 2 +-
> arch/nds32/config.mk | 2 +-
> arch/nds32/cpu/n1213/Makefile | 3 +
> arch/powerpc/cpu/mpc8xx/Makefile | 2 +-
> arch/powerpc/lib/Makefile | 4 +-
> arch/sandbox/cpu/Makefile | 11 +-
> arch/sparc/config.mk | 3 +-
> arch/x86/lib/Makefile | 2 +-
> board/ait/cam_enc_4xx/config.mk | 2 +-
> board/avionic-design/medcom-wide/Makefile | 2 +-
> board/avionic-design/plutux/Makefile | 2 +-
> board/avionic-design/tec-ng/Makefile | 2 +-
> board/avionic-design/tec/Makefile | 2 +-
> board/bct-brettl2/config.mk | 7 +-
> board/bf518f-ezbrd/config.mk | 7 +-
> board/bf526-ezbrd/config.mk | 7 +-
> board/bf527-ad7160-eval/config.mk | 7 +-
> board/bf527-ezkit/config.mk | 7 +-
> board/bf527-sdp/config.mk | 7 +-
> board/bf533-ezkit/config.mk | 7 +-
> board/bf533-stamp/config.mk | 7 +-
> board/bf537-stamp/config.mk | 7 +-
> board/bf538f-ezkit/config.mk | 7 +-
> board/bf548-ezkit/config.mk | 7 +-
> board/bf561-acvilon/config.mk | 7 +-
> board/bf561-ezkit/config.mk | 7 +-
> board/br4/config.mk | 7 +-
> board/cm-bf527/config.mk | 7 +-
> board/cm-bf533/config.mk | 7 +-
> board/cm-bf537e/config.mk | 7 +-
> board/cm-bf537u/config.mk | 7 +-
> board/cm-bf548/config.mk | 7 +-
> board/cm-bf561/config.mk | 7 +-
> board/compal/paz00/Makefile | 2 +-
> board/compulab/trimslice/Makefile | 2 +-
> board/cray/L1/Makefile | 10 +-
> board/freescale/common/Makefile | 5 +-
> board/h2200/Makefile | 2 +-
> board/ip04/config.mk | 7 +-
> board/matrix_vision/mvblm7/Makefile | 4 +-
> board/matrix_vision/mvblx/Makefile | 2 +-
> board/matrix_vision/mvsmr/Makefile | 2 +-
> board/nvidia/common/Makefile | 2 +-
> board/pcs440ep/config.mk | 2 +-
> board/pr1/config.mk | 7 +-
> board/samsung/origen/Makefile | 23 +-
> .../origen/tools/{mkv310_image.c => mkorigenspl.c} | 0
> board/samsung/smdkv310/Makefile | 16 +-
> .../tools/{mkv310_image.c => mksmdkv310spl.c} | 0
> board/sandburst/karef/Makefile | 6 +-
> board/sandburst/metrobox/Makefile | 6 +-
> board/spear/common/Makefile | 5 +-
> board/spear/x600/Makefile | 5 +-
> board/st-ericsson/snowball/Makefile | 2 +-
> board/st-ericsson/u8500/Makefile | 2 +-
> board/tcm-bf518/config.mk | 7 +-
> board/tcm-bf537/config.mk | 7 +-
> common/Makefile | 11 +-
> config.mk | 333 +----
> disk/Makefile | 2 +-
> doc/DocBook/Makefile | 73 +-
> drivers/bios_emulator/Makefile | 5 +-
> drivers/hwmon/Makefile | 2 +-
> drivers/net/npe/Makefile | 4 +-
> drivers/rtc/Makefile | 2 +-
> drivers/usb/musb-new/Makefile | 7 +-
> dts/Makefile | 20 +-
> examples/Makefile | 9 +
> examples/api/Makefile | 44 +-
> examples/standalone/Makefile | 74 +-
> fs/ubifs/Makefile | 2 +-
> fs/yaffs2/Makefile | 9 +-
> lib/Makefile | 2 +-
> lib/lzma/Makefile | 2 +-
> mkconfig | 2 +-
> nand_spl/board/amcc/acadia/Makefile | 45 +-
> nand_spl/board/amcc/bamboo/Makefile | 45 +-
> nand_spl/board/amcc/canyonlands/Makefile | 45 +-
> nand_spl/board/amcc/kilauea/Makefile | 43 +-
> nand_spl/board/amcc/sequoia/Makefile | 47 +-
> nand_spl/board/freescale/mpc8315erdb/Makefile | 47 +-
> nand_spl/board/freescale/mpc8536ds/Makefile | 59 +-
> nand_spl/board/freescale/mpc8569mds/Makefile | 59 +-
> nand_spl/board/freescale/mpc8572ds/Makefile | 59 +-
> nand_spl/board/freescale/p1023rds/Makefile | 60 +-
> nand_spl/board/freescale/p1_p2_rdb/Makefile | 59 +-
> nand_spl/board/sheldon/simpc8313/Makefile | 48 +-
> net/Makefile | 2 +-
> post/lib_powerpc/fpu/Makefile | 29 +-
> rules.mk | 51 -
> scripts/Kbuild.include | 284 +++++
> scripts/Makefile | 2 +
> scripts/Makefile.build | 520 +++++++-
> scripts/Makefile.clean | 108 ++
> scripts/Makefile.host | 170 +++
> scripts/Makefile.lib | 375 ++++++
> scripts/basic/.gitignore | 1 +
> scripts/basic/Makefile | 15 +
> scripts/basic/fixdep.c | 462 +++++++
> scripts/mkmakefile | 59 +
> spl/Makefile | 197 +--
> tools/.gitignore | 3 +-
> tools/Makefile | 373 ++----
> tools/crc32.c | 1 +
> tools/easylogo/Makefile | 12 +-
> tools/env/.gitignore | 2 +
> tools/env/Makefile | 39 +-
> tools/env/README | 5 +-
> tools/env/crc32.c | 1 +
> tools/env/ctype.c | 1 +
> tools/env/env_attr.c | 1 +
> tools/env/env_flags.c | 1 +
> tools/env/linux_string.c | 1 +
> tools/env_embedded.c | 1 +
> tools/fdt.c | 1 +
> tools/fdt_ro.c | 1 +
> tools/fdt_rw.c | 1 +
> tools/fdt_strerror.c | 1 +
> tools/fdt_wip.c | 1 +
> tools/gdb/Makefile | 64 +-
> tools/image-fit.c | 1 +
> tools/image-sig.c | 1 +
> tools/image.c | 1 +
> tools/kernel-doc/Makefile | 21 +-
> tools/md5.c | 1 +
> tools/rsa-sign.c | 1 +
> tools/sha1.c | 1 +
> 153 files changed, 3682 insertions(+), 2058 deletions(-)
> rename board/samsung/origen/tools/{mkv310_image.c => mkorigenspl.c} (100%)
> rename board/samsung/smdkv310/tools/{mkv310_image.c => mksmdkv310spl.c}
> (100%)
> create mode 100644 examples/Makefile
> delete mode 100644 rules.mk
> create mode 100644 scripts/Kbuild.include
> create mode 100644 scripts/Makefile
> create mode 100644 scripts/Makefile.clean
> create mode 100644 scripts/Makefile.host
> create mode 100644 scripts/Makefile.lib
> create mode 100644 scripts/basic/.gitignore
> create mode 100644 scripts/basic/Makefile
> create mode 100644 scripts/basic/fixdep.c
> create mode 100644 scripts/mkmakefile
> create mode 100644 tools/crc32.c
> create mode 100644 tools/env/.gitignore
> create mode 100644 tools/env/crc32.c
> create mode 100644 tools/env/ctype.c
> create mode 100644 tools/env/env_attr.c
> create mode 100644 tools/env/env_flags.c
> create mode 100644 tools/env/linux_string.c
> create mode 100644 tools/env_embedded.c
> create mode 100644 tools/fdt.c
> create mode 100644 tools/fdt_ro.c
> create mode 100644 tools/fdt_rw.c
> create mode 100644 tools/fdt_strerror.c
> create mode 100644 tools/fdt_wip.c
> create mode 100644 tools/image-fit.c
> create mode 100644 tools/image-sig.c
> create mode 100644 tools/image.c
> create mode 100644 tools/md5.c
> create mode 100644 tools/rsa-sign.c
> create mode 100644 tools/sha1.cApplied to u-boot/master, thanks! -- Tom
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