u-boot.git/examples, branch v2014.10

kbuild: standalone: simplify clean-files

2014-09-16T16:23:59+00:00

Files added $(extra-) are removed by "make clean".
Besides, wildcard "*.srec *.bin" is simpler.

Signed-off-by: Masahiro Yamada

standalone: use GCC_VERSION defined in compiler-gcc.h

2014-09-16T16:23:57+00:00

Now GCC_VERSION is defined in include/linux/compiler-gcc.h
(with a little different definition).
Use it and delete the one in examples/standlone/stub.c.

This should work on Clang too because __GNUC__, __GNUC_MINOR__,
__GNUC_PATCHLEVEL__ are also defined on Clang.

Signed-off-by: Masahiro Yamada 
Cc: Jeroen Hofstee

examples: select libgcc for non-default architecture

2014-05-23T20:51:26+00:00

In case of multilib-enabled toolchains if default architecture differ from
the one examples are being built for linker will fail to link example object
files with libgcc of another (non-compatible) architecture.

Interesting enough for years in main Makefile we used CFLAGS/c_flags for this
but not for examples.

So fixing it now.

Signed-off-by: Alexey Brodkin 

Cc: Masahiro Yamada 
Cc: Tom Rini 
Cc: Wolfgang Denx 
Acked-by: WOlfgang Denk 
Acked-by: Masahiro Yamada

standalone: delete an unused source file

2014-04-17T21:44:35+00:00

Signed-off-by: Masahiro Yamada

powerpc: mpc8260: consolidate CONFIG_MPC8260 and CONFIG_8260

2014-03-07T15:59:06+00:00

Before this commit, CONFIG_MPC8260 and CONFIG_8260
were used mixed-up.

All boards with mpc8260 cpu defined both of them:
  - CONFIG_MPC8260 was defined in board config headers
      and include/common.h
  - CONFIG_8260 was defined arch/powerpc/cpu/mpc8260/config.mk

We do not need to have both of them.
This commit keeps only CONFIG_MPC8260.

This commit does:
 - Delete CONFIG_8260 and CONFIG_MPC8260 definition
   in config headers and include/common.h
 - Rename CONFIG_8260 to CONFIG_MPC8260
    in arch/powerpc/cpu/mpc8260/config.mk.
 - Rename #ifdef CONFIG_8260 to #ifdef CONFIG_MPC8260

Signed-off-by: Masahiro Yamada 
Cc: Wolfgang Denk

kbuild: improve Kbuild speed

2014-03-07T15:59:06+00:00

Kbuild brought about many advantages for us but a significant
performance regression was reported by Simon Glass.

After some discussions and analysis, it turned out
its main cause is in $(call cc-option,...).

Historically, U-Boot parses all config.mk
(arch/*/config.mk and board/*/config.mk)
every time descending into subdirectories.
That means cc-options are evaluated over and over again.

$(call cc-option,...) is useful but costly.
So we want to evaluate them only in ./Makefile
and spl/Makefile and export compiler flags.

This commit changes the build system as follows:

  - Modify scripts/Makefile.build to not include config.mk
    Instead, add $(PLATFORM_CPPFLAGS) to asflags-y, ccflags-y,
    cppflags-y.

  - Export many variables
    Going forward, Kbuild will not parse config.mk files
    when it descends into subdirectories.
    If we want to set variables in config.mk and use them
    in subdirectories, they must be exported.

    This is the list of variables to get exported:
      PLATFORM_CPPFLAGS
      CPUDIR
      BOARDDIR
      OBJCOPYFLAGS
      LDFLAGS
      LDFLAGS_FINAL
        (used in nand_spl/board/*/*/Makefile)
      CONFIG_STANDALONE_LOAD_ADDR
        (used in examples/standalone/Makefile)
      SYM_PREFIX
        (used in examples/standalone/Makefile)
      RELFLAGS
        (used in examples/standalone/Makefile)

  - Delete CPPFLAGS
    This variable has been replaced with PLATFORM_CPPFLAGS

  - Copy gcclibdir from example/standalone/Makefile
    to arch/sparc/config.mk
    The reference in CONFIG_STANDALONE_LOAD_ADDR must be
    resolved before it is exported.

Signed-off-by: Masahiro Yamada 
Reported-by: Simon Glass 
Acked-by: Simon Glass 
Tested-by: Simon Glass  [on Sandbox]
Tested-by: Stephen Warren  [on Tegra]

kbuild: use shorten logs for misc targets

2014-02-25T16:01:29+00:00

Signed-off-by: Masahiro Yamada

kbuild: use shorten logs objcopy rules

2014-02-25T16:01:29+00:00

Signed-off-by: Masahiro Yamada

examples: move api/ and standalone/ entry to examples/Makefile

2014-02-19T16:07:51+00:00

Signed-off-by: Masahiro Yamada

kbuild: use Linux Kernel build scripts

2014-02-19T16:07:50+00:00

Now we are ready to switch over to real Kbuild.

This commit disables temporary scripts:
  scripts/{Makefile.build.tmp, Makefile.host.tmp}
and enables real Kbuild scripts:
  scripts/{Makefile.build,Makefile.host,Makefile.lib}.

This switch is triggered by the line in scripts/Kbuild.include
  -build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build.tmp obj
  +build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj

We need to adjust some build scripts for U-Boot.
But smaller amount of modification is preferable.

Additionally, we need to fix compiler flags which are
locally added or removed.

In Kbuild, it is not allowed to change CFLAGS locally.
Instead, ccflags-y, asflags-y, cppflags-y,
CFLAGS_$(basetarget).o, CFLAGS_REMOVE_$(basetarget).o
are prepared for that purpose.

Signed-off-by: Masahiro Yamada 
Tested-by: Gerhard Sittig