klibc - Jul 2010 - version compatibility between linux and klibc

Are there any version compatibilities between linux and klibc?  I tried to
compile the latest klibc (1.5.18) with the latest linux (2.6.32.15) and
there is miserable compile failures.  It looks like klibc wants some headers
to be in include/asm (linked in my case to include/asm-x86) but they are
instead in include/asm-generic (it seems all headers but one are in there).

I put together this script to be sure I was doing the steps consistently for
each attempt (and also starting with a pristine set of files each time):

http://phil.ipal.org/linux-and-klibc/compile-linux-and-klibc

Here is one of the bad results (running the above script):

http://phil.ipal.org/linux-and-klibc/20100704-200321-025257-compile-linux-and-klibc.log

I added a step to copy include/asm-generic to include/asm and that seemed to
help some.  But there was nothing in the README files about needing to do
that.  Here is a lot of that result:

http://phil.ipal.org/linux-and-klibc/20100704-200541-017273-compile-linux-and-klibc.log

Does someone know the way I should be doing this?
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On Sun, Jul 04, 2010 at 08:30:03PM -0400, Phil Howard
wrote:
> Are there any version compatibilities between linux and klibc?  I tried to
> compile the latest klibc (1.5.18) with the latest linux (2.6.32.15) and
> there is miserable compile failures.  It looks like klibc wants some
headers
> to be in include/asm (linked in my case to include/asm-x86) but they are
> instead in include/asm-generic (it seems all headers but one are in there).
hmm I haven't tried exactly with 2.6.32.15, but it does compile with
earlier 2.6.32.

I'd more guess that you are doing something wrong here, see the output
of "make help" on how to easily compile against linux-2.6.

On Sun, Jul 04, 2010 at 08:30:03PM -0400, Phil Howard
wrote:
> Are there any version compatibilities between linux and klibc?  I tried to
> compile the latest klibc (1.5.18) with the latest linux (2.6.32.15) and
> there is miserable compile failures.  It looks like klibc wants some
headers
> to be in include/asm (linked in my case to include/asm-x86) but they are
> instead in include/asm-generic (it seems all headers but one are in there).
> 
> I put together this script to be sure I was doing the steps consistently
for
> each attempt (and also starting with a pristine set of files each time):
> 
> http://phil.ipal.org/linux-and-klibc/compile-linux-and-klibc
> 
> Here is one of the bad results (running the above script):
> 
>
http://phil.ipal.org/linux-and-klibc/20100704-200321-025257-compile-linux-and-klibc.log
> 
> I added a step to copy include/asm-generic to include/asm and that seemed
to
> help some.  But there was nothing in the README files about needing to do
> that.  Here is a lot of that result:
The above is wrong - klibc today should be built using exported headers.
I tried with latest klibc + kernel.

This worked for me:
cd $KERNEL
make headers_install
cd $KLIBC
make KLIBCKERNELSRC=$KERNEL/usr 


Note that "headers_install" install the userspace ready headers in
$KERNEL/usr
which is why this dir is specified as argument to KLIBCKERNELSRC.

	Sam

When trying to build klibc on a native i386 box it
failed to include asm/posix_types.h

This was tracked down to a wrong include path.
For x86_64 it was correct.
Fix it for i386.

This should fix the build problem reported Phil Howard.

Signed-off-by: Sam Ravnborg <sam at ravnborg.org>
Cc: Phil Howard <kunnskaperen at gmail.com>
---

Hi Max - a proper patch submission.
Feel free to use this or whatever.

	Sam



diff --git a/usr/klibc/arch/i386/MCONFIG b/usr/klibc/arch/i386/MCONFIG
index ef112a4..f4cb914 100644
--- a/usr/klibc/arch/i386/MCONFIG
+++ b/usr/klibc/arch/i386/MCONFIG
@@ -31,3 +31,7 @@ KLIBCBITSIZE  = 32
 # calls, and work on the memory models for this architecture
 # 96 MB - normal binaries start at 128 MB
 KLIBCSHAREDFLAGS	= -Ttext 0x06000200
+
+# Asm includes for i386 are in the merged x86 tree
+KLIBCARCHINCFLAGS = -I$(KLIBCKERNELOBJ)/arch/x86/include
+

FYI basically same patch was done and tested in OpenEmbedded on 2010-07-01:

http://cgit.openembedded.org/cgit.cgi/openembedded/tree/recipes/klibc/klibc-1.5.18/klibc-x86-KLIBCARCHINCFLAGS.patch?id=d3c1b02dd6e4d5a128477ea594eb2d0c03d66b08

Regards

Andrea

On Wed, 07 Jul 2010, Andrea Adami wrote:
> FYI basically same patch was done and tested in OpenEmbedded on 2010-07-01:
> 
>
http://cgit.openembedded.org/cgit.cgi/openembedded/tree/recipes/klibc/klibc-1.5.18/klibc-x86-KLIBCARCHINCFLAGS.patch?id=d3c1b02dd6e4d5a128477ea594eb2d0c03d66b08
thanks for info, added to commit message.