Patchworkβ [11/18] kconfig CROSS_COMPILE option

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Submitter Sam Ravnborg
Date 2009-09-19 13:13:16
Message ID <20090919131316.GA26044@merkur.ravnborg.org>
Download mbox | patch
Permalink /patch/48758/
State New
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Comments

Sam Ravnborg - 2009-09-19 13:13:16
On Sat, Sep 19, 2009 at 05:19:50AM -0700, Roland McGrath wrote:
> 
> One thing I'd thought to do in "finishing it up" was to write just the
> $ARCH string alone to kernel.arch (then needing a kernel.subarch too)
> rather than a makefile fragment.  My thinking is that any scripty things
> that would like to look at a given build dir (as in the installed
> /lib/modules/foo/build in kernel-devel packages) would like to extract
> the arch name as well as the kernel release string, and not necessarily
> do it by running make or parsing makeish assignment lines.

Another approach would be to ask kbuild for
this information so we do not expose various filenames to the
outer world.

Somthing like this:


This is analogous to the way we ask for
kernelrelease and kernelversion these days.

	Sam
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Roland McGrath - 2009-09-19 23:48:23
> Another approach would be to ask kbuild for
> this information so we do not expose various filenames to the
> outer world.

For shell scripts and makefiles, running a command like make and retrieving
its output via pipe is de rigueur.  But for some other programs it might be
substantially less hassle to just read plain files.  That's what I was
thinking, anyway.  (I only really think that $ARCH is something that anyone
would want to fetch before they'd run make anyway, and I guess $SUBARCH in
the case of ARCH=um, but not $CROSS_COMPILE.)

> This is analogous to the way we ask for
> kernelrelease and kernelversion these days.

Except that include/config/kernel.release is there for all to see (when
referring to /lib/modules/.../build directory, e.g.), so perhaps some
people are in fact using that.


Thanks,
Roland
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Patch

diff --git a/Makefile b/Makefile
index c41035a..8f488c9 100644
--- a/Makefile
+++ b/Makefile
@@ -1528,6 +1523,12 @@  kernelrelease:
 kernelversion:
 	@echo $(KERNELVERSION)
 
+kernelarch:
+	@echo $(ARCH)
+
+kernelsubarch:
+	@echo $(SUBARCH)
+
 # Single targets
 # ---------------------------------------------------------------------------
 # Single targets are compatible with: