Re: [U-Boot] [PATCH] kbuild/makefile: allow building host tools separately

31 Mar 2014


      Hi Alexey,
...
...
This may be the similar discussion to
http://u-boot.10912.n7.nabble.com/U-Boot-could-not-cross-compile-u-boot-tool...
It looks not that relevant to me.
For example even before switching U-Boot to Kbuild it was not possible
to build host tools simply without patching sources/headers or
configuring real target. Or I might be missing something here.
Sorry, I should have explained it more exactly.
What I wanted you to refer is Wolfgang's comment in that thread.
This part:
Wolfgang wrote:
...
I'm not really hapy with the additional CROSS_BUILD_TOOLS paramert - 
but this may be a matter of taste, so the following is just a thought 
and a question:
Would it make more sense to provide a sparate make target instead?
Say, something like this:
    Build tools for host 
            make  CROSS_COMPILE=<your_gcc_prefix tools 
    Build tools for target 
            make  CROSS_COMPILE=<your_gcc_prefix cross_tools 


?
And then we chose a new make target "cross_tools"
rather than a new option "CROSS_BUILD_TOOLS=1".
That is similar to what is happening here.
I wanted to show retionale why a make target "tools-only" is better
than "HOST_TOOLS_ONLY=yes".
...
Doesn't work for me:
$ make tools-only
  HOSTCC  scripts/basic/fixdep
  HOSTCC  tools/aisimage.o
  HOSTCC  tools/crc32.o
  HOSTCC  tools/default_image.o
  HOSTCC  tools/dumpimage.o
In file included from include/version.h:11:0,
                 from tools/dumpimage.c:11:
include/timestamp.h:11:47: fatal error:
generated/timestamp_autogenerated.h: No such file or directory
 #include "generated/timestamp_autogenerated.h"
                                               ^
compilation terminated.
make[1]: *** [tools/dumpimage.o] Error 1
make: *** [tools-only] Error 2
========
Oops - My bad.
I was disabling timestamp.
Could you fix like this?
tools-only: scripts_basic $(version_h) $(timestamp_h)
    $(Q)$(MAKE) $(build)=tools
It worked for me.
$ make  tools-only
  HOSTCC  scripts/basic/fixdep
  CHK     include/config/uboot.release
  UPD     include/config/uboot.release
  CHK     include/generated/version_autogenerated.h
  UPD     include/generated/version_autogenerated.h
  CHK     include/generated/timestamp_autogenerated.h
  UPD     include/generated/timestamp_autogenerated.h
  HOSTCC  tools/aisimage.o
  HOSTCC  tools/crc32.o
  HOSTCC  tools/default_image.o
  HOSTCC  tools/dumpimage.o
  HOSTCC  tools/fdt.o
  HOSTCC  tools/fdt_ro.o
  HOSTCC  tools/fdt_rw.o
  HOSTCC  tools/fdt_strerror.o
  HOSTCC  tools/fdt_wip.o
  HOSTCC  tools/fit_image.o
  HOSTCC  tools/image-fit.o
  HOSTCC  tools/image-host.o
  HOSTCC  tools/image.o
  HOSTCC  tools/imagetool.o
  HOSTCC  tools/imximage.o
  HOSTCC  tools/kwbimage.o
  HOSTCC  tools/md5.o
  HOSTCC  tools/mkenvimage.o
  HOSTCC  tools/mkimage.o
  HOSTCC  tools/mxsimage.o
  HOSTCC  tools/omapimage.o
  HOSTCC  tools/os_support.o
  HOSTCC  tools/pblimage.o
  HOSTCC  tools/sha1.o
  HOSTCC  tools/ublimage.o
  HOSTLD  tools/mkenvimage
  HOSTLD  tools/dumpimage
  HOSTLD  tools/mkimage
  HOSTCC  tools/proftool
Best Regards
Masahiro Yamada