[Mesa-dev] [Bug 80848] [dri3] Building mesa fails with dri3 enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80848

--- Comment #21 from Tapani Pälli <lemody at gmail.com> ---
(In reply to comment #20)
> (In reply to comment #19)
> > (In reply to comment #18)
> > > I had cross-compilation problems on Ubuntu (building 32bit Mesa on 64bit
> > > environment) and my problems went away by reverting
> > > 
> > > 3ecd9e1a93817180fa5b280e5fe11c903cca38ba
> > > 
> > > For some reason otherwise a wrong version (64bit one) of libexpat got
> > > included to linking. Patch adds $(EXPAT_LIBS) when linking libloader so that
> > > is why I tried the revert. I'll try to see why this happens.
> > 
> > whoopsie forgot to paste my build command line:
> > 
> > INTEL_CFLAGS='-I/opt/include -I/opt/include/libdrm' INTEL_LIBS='-L/opt/lib
> > -ldrm_intel' CFLAGS='-m32' CXXFLAGS='-m32' ./autogen.sh --prefix=/opt
> > --enable-gles2 --without-gallium-drivers --enable-32-bit
> > --with-dri-drivers=i965 --with-egl-platforms=x11 --disable-osmesa
> > --disable-vdpau --disable-dri3 --enable-debug --enable-glx-tls
> > --enable-texture-float
> 
> I find something a bit disturbing here - why would you set
> INTEL_{CFLAGS,LIBS} rather than relying on pkg-config ?

because libdrm is the only library I use from under /opt, rest comes from the
system

> Your native arch is x86-64 thus the lack of PKG_CONFIG_PATH is the one
> causing you problems - pkgconfig looks for the variable (none set) then goes
> into the default dir which has a .pc file pointing to a 64bit library.

well, it has been working so far without problems though (and this command line
actually still works fine on my fedora machine, but on ubuntu it does not),
libtool takes care of pointing to the correct arch directory

> Or to put things in a different light - please can we avoid shooting mesa in
> the back by providing any other flags but PKG_CONFIG_PATH, CFLAGS and
> CXXFLAGS. Thank you
> 
> P.S. Things should just work even without C{XX,}FLAGS='-m32' unless we have
> a bug somewhere :)

Unfortunately we do, giving '-m32' manually is the only way to get working
32bit build because we initialize libtool too early (LT_INIT), here's the bug:

https://bugs.freedesktop.org/show_bug.cgi?id=50754

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