[Bug 1882871] Review Request: xmake - A cross-platform build utility based on Lua

https://bugzilla.redhat.com/show_bug.cgi?id=1882871

--- Comment #4 from Artur Frenszek-Iwicki  ---
> > You need to call the %set_build_flags macro to ensure that Fedora's CXXFLAGS are set properly.
>
> Is this necessary? I saw that many other rpm packages do not add this. for example:
> https://src.fedoraproject.org/rpms/premake/blob/master/f/premake.spec

Fedora's CFLAGS are available in the form of the %{optflags} RPM macro.
What %set_build_flags does, is it simply performs 'export CFLAGS="%{optflags}"'
(and the same for CXXFLAGS).
The linked spec for premake employs a slightly different approach, as it uses
sed to inject %{optflags} straight into the Makefile.