glibc issues with --enable-kernel=

hauradou hauradou at
Fri Jan 21 14:22:24 PST 2011

Bruce Dubbs a écrit :
> Matthew Burgess wrote:
>>> I'm not sure about that.  We are not building glibc against the host
>>> kernel.  We are using the most recent headers from section 6.7.  By
>>> specifying --enable-kernel= we are only telling the build system what
>>> features to use.
>> Yes, I understand that.  However, when it comes to running the tests in
>> chapter 6, we haven't yet rebooted into the LFS kernel yet.  Therefore,
>> the test results will obviously depend on whether or not the features
>> they are testing for are available in the host kernel or not.
>> For example, assume the host has a kernel (our current earliest
>> supported version).  If we then specify --enable-kernel=2.6.30 to the
>> chapter 6 Glibc build, that Glibc may contain features that are only
>> available in 2.6.30 kernels and provides no fallbacks for the
>> version.  At that point, running the tests or even trying to
>> run any of the binaries linked against that version of Glibc could fail
>> if they happen to touch those bits of Glibc that only support Linux >=
>> 2.6.30.  So, basically, if we bump the --enable-kernel parameter, we
>> also need to bump the host system requirements.
> OK, so do we use (LFS-6.5)?  Do we need to update any other 
> packages in the requirements or make everything from LFS-6.5 (Aug 2009)? 
>   Right now, the minimum requirements are from LFS-6.3 (Aug 2007).
>    -- Bruce
what about changing that glibc configure line into something like:
enable-kernel=`uname -r | awk -F. '{ print $1"."$2"."$3 }'`
So that any of these versions could be convenient ?


More information about the lfs-dev mailing list