Re: Fedora 33 System-Wide Change proposal: CMake to do out-of-source builds

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On Wed, 2020-06-17 at 01:38 +0200, Kevin Kofler wrote:
> James Cassell wrote:
> > If you're doing this, might I suggest reversing the condition so
> > the new
> > way is in the "else" part, hence "default"?
> 
> The problem is that this results in a counterintuitive &&, as in:
> %if 0%{?fedora} <= 32 && 0%{?rhel} <= 8
> (by de Morgan's law, or if you want to analyze it directly, because 
> 0%{?rhel} <= 8 will always be true on Fedora).

%if (0%{?rhel} && 0%{?rhel}) <= 8 || (0%{?fedora} && 0%{?fedora} <= 32)

> > I've run into issues rebuilding packages because there was such a
> > condition from a decade ago and I didn't have %fedora defined
> > because I
> > was trying to build it for another distro. (Common issue amongst
> > the ruby
> > packages.)
> 
> Then you will always get the conditional for the oldest Fedora (no
> matter 
> what is the %if and what the %else part) because 0%{?fedora} will be
> 0, by 
> design.
> 
> The specfiles in Fedora dist-git are either only for Fedora or for
> Fedora 
> and RHEL/CentOS. They are not expected to work on any other distro.

While this is true, I know that some spec files are taken as-is to
openSUSE and Mageia. So it would be nice to have same and simple spec
files that work across multiple distributions.

>         Kevin Kofler
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- -- 
Igor Raits <ignatenkobrain@xxxxxxxxxxxxxxxxx>
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