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[Fedora-packaging] Re: Re: BuildRoot



Ville Skyttä wrote:

> The above looks ok on first sight, and would look even better if
> %buildroot was defined as
> %{_tmppath}/%{name}-%{version}-%{release}-%{_target_cpu} which I'd
> assume to take care of the multiarch simultaneous build issue and not
> really obfuscate things at all.
> 
> Too bad it doesn't work very well, for "BuildArch: noarch" packages,
> %{buildroot} ends up ending with -noarch here as expected, but
> $RPM_BUILD_ROOT ends with -x86_64.  And for example many scripts
> in /usr/lib/rpm operate on $RPM_BUILD_ROOT.  On the other hand, explicit
> --target to rpmbuild affects both consistently, so I suppose BuildArch
> (not limited to noarch) in specfiles kicks in too late to affect
> $RPM_BUILD_ROOT.  Reproducer: try rpmbuild -bp with this specfile and
> the above %buildroot definition in macros somewhere:
> 
> ---
> Name:           foo
...
> BuildArch:      noarch
> %description
> %prep
> echo %{buildroot}
> echo $RPM_BUILD_ROOT
> ---
> 
> /var/tmp/foo-1-1-noarch
> /var/tmp/foo-1-1-x86_64

Yuck, though, in practice mostly harmless, since we enforce the consistent
use (ie, not mixing) of either %buildroot or $RPM_BUILD_ROOT.

-- Rex


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