libstdc++-devel.i686 is available in the tree. Did you try installing it?

Oops, yes, distro is OK, just yum-builddep has a bug.

# cat >bireq.spec <<EOH
Summary: bireq
Name: bireq
Version: 1
Release: 0%{?dist}
License: GPL
BuildRequires: libstdc++(x86-64)
BuildRequires: libstdc++(x86-32)
%description
EOH
# rpmbuild -bs bireq.spec
Wrote: /root/rpmbuild/SRPMS/bireq-1-0.el6.src.rpm
# yum-builddep rpmbuild/SRPMS/bireq-1-0.el6.src.rpm
Loaded plugins: refresh-packagekit, rhnplugin
This system is not registered with RHN.
RHN support will be disabled.
Getting requirements for bireq-1-0.el6.src
 --> Already installed : libstdc++-4.4.4-4.el6.x86_64
 --> libstdc++-4.4.4-4.el6.i686
No uninstalled build requires
# rpm -q libstdc++
libstdc++-4.4.4-4.el6.x86_64
# yum install 'libstdc++(x86-32)'
--> Running transaction check
---> Package libstdc++.i686 0:4.4.4-4.el6 set to be updated
--> Finished Dependency Resolution
Dependencies Resolved
 Package                    Arch                  Version                      Repository             Size
Installing:
 libstdc++                  i686                  4.4.4-4.el6                  rhel                  287 k
Transaction Summary
Install       1 Package(s)
Upgrade       0 Package(s)

Total download size: 287 k
Installed size: 908 k
Is this ok [y/N]: no

 The code does:

                    pkg = self.returnPackageByDep(dep)
                    self.logger.info(' --> %s' % pkg)
                    if not self.rpmdb.installed(name=pkg.name):
                        self.tsInfo.addInstall(pkg)

...changing that to:

                    pkg = self.returnPackageByDep(dep)
                    self.logger.info(' --> %s' % pkg)
                    if not self.rpmdb.installed(name=pkg.name, arch=pkg.arch):
                        self.tsInfo.addInstall(pkg)

...fixes it here. Seth, any idea why we didn't do that to start with?

The interesting thing there is that it's already checked to see if any installed package provides what is needed. So just doing nothing means it won't do updates etc.

Doing (what I expected it would have done):

                    pkg = self.returnPackageByDep(dep)
                    self.logger.info(' --> %s' % pkg)
                    self.install(pkg)

...works too.

I see ... the rpmdb.installed() check is from before we called, returnInstalledPackagesByDep() ... so that was the only check we had that we weren't installing something undeeded.

I'll change it to the comment #5, upstream ... I can do the change for 6.0, but I'm 99.999% sure this isn't a regression in yum-buildep ... just that we don't install all of multilib. by default now. So I bet before we either didn't have libstdc++ in the buildroot or had both arches.

I'm happy to fix this for 6.0, as I said in comment#5 it's like a two line change and pretty easy to test.

verified on multilib platforms (x86_64, s390x, ppc64)

Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.