[U-Boot] [PATCH 0/2] Allow empty board dir and fix build error of arcangel4 boards

[Masahiro Yamada]

Currently arcangel4 and arcangel4-be boards are broken.

  $ make CROSS_COMPILE=arc-buildroot-linux-uclibc- arcangel4_config all
  Configuring for arcangel4 board...
    GEN     include/autoconf.mk.dep
    GEN     include/autoconf.mk
    CHK     include/config/uboot.release
    [snip]
    LDS     u-boot.lds
    LD      u-boot
  arc-buildroot-linux-uclibc-ld.bfd: cannot find board/synopsys/arcangel4/built-in.o: No such file or directory
  make[1]: *** [u-boot] Error 1
  make: *** [build-one-by-one] Error 2

The cause of the build error is that neither "obj-y" nor "obj-"
is defined in board/synopsys/arcangel4/Makefile.
In kbuild, empty makefiles are not allowed.

The same sort of build errors have happened before this.
Commit 2aa43f70 resolved the build error by adding
"obj- := __dummy__.o",
but it was not the best solution.

If there are no source files to compile under the board directory,
it is better to not descend into that directory.



Masahiro Yamada (2):
  kbuild: allow empty board directories
  arc: arcangel4: set board entry <none> to fix a build error

 Makefile                          |  2 +-
 board/synopsys/arcangel4/Makefile | 11 -----------
 boards.cfg                        |  4 ++--
 config.mk                         |  2 ++
 mkconfig                          |  6 ++++--
 5 files changed, 9 insertions(+), 16 deletions(-)
 delete mode 100644 board/synopsys/arcangel4/Makefile

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1.8.3.2