On Thu, 2018-07-05 at 14:30 -0700, Randy Dunlap wrote:
Hi,
Is there a good way (or a shortcut) to do something like:
$ make ARCH=powerpc O=PPC32 [other_options] allmodconfig
to get a PPC32/32BIT allmodconfig
and also be able to do:
$make ARCH=powerpc O=PPC64 [other_options] allmodconfig
to get a PPC64/64BIT allmodconfig?
Hrm... O= is for the separate build dir, so there much be something
else.
You mean having ARCH= aliases like ppc/ppc32 and ppc64 ?
That would be a matter of overriding some .config defaults I suppose, I
don't know how this is done on other archs.
I see the aliasing trick in the Makefile but that's about it.
Note that arch/x86, arch/sh, and arch/sparc have ways to do
some flavor(s) of this (from Documentation/kbuild/kbuild.txt;
sh and sparc based on a recent "fix" patch from me):
I fail to see what you are actually talking about here ... sorry. Do
you have concrete examples on x86 or sparc ? From what I can tell the
"i386" or "sparc32/sparc64" aliases just change SRCARCH in Makefile and
32 vs 64-bit is just a Kconfig option...
x86: i386 for 32 bit, x86_64 for 64 bit
sh: sh for 32 bit, sh64 for 64 bit
sparc: sparc32 for 32 bit, sparc64 for 64 bit