Building i386 RPMs on x86_64

[Paul Howarth]

Dave Atkinson wrote:
> On Thu, 2005-09-15 at 07:42 +0100, Paul Howarth wrote:
> 
>>On Wed, 2005-09-14 at 19:13 +0100, Dave Atkinson wrote:
>>
>>>Sorry if this issue's been addresses before (is there an effective way
>>>to search fedora mailing lists?).
>>>
>>>I've been trying to build some i386 RPMs on my x86_64 machine using
>>>
>>>$ rpmbuild -ba --target i386 <spec file>
>>>
>>>and it seems that this gives me library directories for 64-bit
>>>libraries.  Specifically the %configure macro sets _libdir to
>>>%{prefix}/lib64, but it should be %{prefix}/lib for i[3456]86 etc.
>>>
>>>Am I missing something?
>>
>>Try "man setarch"
> 
> 
> Aha! Well, I certainly missed that! However 
> 
> $ setarch i386 rpmbuild -ba --target i386 <spec file>
> 
> builds <package>.rpm, but I still get
> 
> $ rpm -qlp <package>.rpm
> ...
> /usr/lib64/...
> /usr/lib64/...
> ...
> 
> Looking at /usr/lib/rpm/macros, from line 865 (rpm-4.4.1-22.x86_64) I
> see the following:
> [snip]
> #==============================================================================
> # ---- per-platform macros.
> #       Macros that are specific to an individual platform. The values
> here
> #       will be used if the per-platform macro file does not exist..
> #
> %_arch                  x86_64
> %_build_arch            x86_64
> %_vendor                redhat
> %_os                    linux
> %_gnu                   -gnu
> %_target_platform       %{_target_cpu}-%{_vendor}-%{_target_os}%{?_gnu}
> [snip]
> 
> and sure enough, there are no platform-specific macros for archs other
> than x86_64 and noarch on the FC4 x86_64 install.  
> 
> $ rpm -ql rpm | grep '/usr/lib/rpm/.*-linux'
> /usr/lib/rpm/noarch-linux
> /usr/lib/rpm/noarch-linux/macros
> /usr/lib/rpm/x86_64-linux
> /usr/lib/rpm/x86_64-linux/macros
> 
> It just so happens I have the FC4 i386 install on another disk (this
> whole exercise is about trying to get rid of it ;).  Looking at the
> files installed on that:
> 
> $ rpm --dbpath /oldsys/var/lib/rpm -qil rpm|grep '/usr/lib/rpm/.*-linux'
> /usr/lib/rpm/athlon-linux
> /usr/lib/rpm/athlon-linux/macros
> /usr/lib/rpm/i386-linux
> /usr/lib/rpm/i386-linux/macros
> /usr/lib/rpm/i486-linux
> /usr/lib/rpm/i486-linux/macros
> /usr/lib/rpm/i586-linux
> /usr/lib/rpm/i586-linux/macros
> /usr/lib/rpm/i686-linux
> /usr/lib/rpm/i686-linux/macros
> /usr/lib/rpm/noarch-linux
> /usr/lib/rpm/noarch-linux/macros
> /usr/lib/rpm/pentium3-linux
> /usr/lib/rpm/pentium3-linux/macros
> /usr/lib/rpm/pentium4-linux
> /usr/lib/rpm/pentium4-linux/macros
> 
> I tried copying the ones that didn't exist in x86_64 and re-running
> 
> $ setarch i386 rpmbuild -ba --target i386 rpms/SPECS/<package>.spec
> $ rpm -qlp rpms/RPMS/i386/<package>.i386.rpm
> ...
> /usr/lib64/...
> /usr/lib64/...
> ...
> 
> but the libs _still_ get installed in /usr/lib64!
> 
> Anyone else think I should file a bug for this?  I think it would also
> be nice if rpmbuild --showrc would respect --target.  At present, I get
> this:
> 
> $ rpmbuild --showrc --target i386 | egrep '(_lib[[:space:]])|
> optflags.*:'
> optflags              : %{__global_cflags} -m64 -mtune=nocona
> -14: _lib       lib64
> 
> which doesn't seem right to me.

I would use mock to do this. It'll sort out all of these issues for you 
and also help you to find any missing buildrequires in your packages.

http://fedoraproject.org/wiki/Legacy/Mock

Paul.