[Mesa-dev] [PATCH v2 3/4] meson: build clover

[Dylan Baker]

Quoting Jan Vesely (2017-12-13 14:23:21)
> On Wed, 2017-12-13 at 13:54 -0800, Dylan Baker wrote:
> > Quoting Jan Vesely (2017-12-13 12:53:25)
> > > On Wed, 2017-12-13 at 09:47 -0800, Dylan Baker wrote:
> > > > +if (with_gallium_va or with_gallium_vdpau or with_gallium_omx or
> > > > +    with_gallium_xvmc or with_dri)
> > > > +  pipe_loader_link_with += libgalliumvl
> > > > +else
> > > > +  pipe_loader_link_with += libgalliumvl_stubs
> > > > +endif
> > > > +if with_gallium_va or with_gallium_vdpau or with_gallium_omx or with_gallium_xvmc  
> > > 
> > > git am complains about whitespace errors at the end of the above line.
> > 
> > I can fix that.
> > 
> > > 
> > > I tested with:
> > > meson -Ddri-drivers= -Dgallium-drivers=r600 -Dopengl=true -Dplatforms=x11 -Dopencl=true
> > > 
> > > meson asked for libdrm_amdgpu dependency even though I'm only building clover+r600g driver.
> > 
> > That's probably because you didn't add `-Dvulkan-drivers=`, since radv does depend
> > on libdrm_amdgpu. If you add that and still get a request for libdrm_amdgpu let
> > me know and I'll look into it further.
> 
> right, that fixes it. sorry for the noise.
> 
> > 
> > > after a bit of fiddling with PATH and PK_CONFIG_PATH to pick up the latest llvm/liblclc
> > > linking failed with:
> > > src/gallium/auxiliary/libgallium.a(gallivm_lp_bld_misc.cpp.o):(.data.rel.ro._ZTI26DelegatingJITMemoryManager[_ZTI26DelegatingJITMemoryManager]+0x10): undefined reference to `typeinfo for llvm::RTDyldMemoryManager'
> > > collect2: error: ld returned 1 exit status
> > > 
> > > this looks like it did not pick up the rtti setting from llvm-config:
> > > $ ~/.local/bin/llvm-config --has-rtti
> > > NO
> > > $ ~/.local/bin/llvm-config --cxxflags | grep -o fno-rtti
> > > fno-rtti
> > > 
> > > rtti setting is quite messy since clover uses dynamic_cast. I think it
> > > should be OK to only support rtti build of llvm if it's detected at
> > > configure time
> > > 
> > > it'd also be nice for meson to remember llvm-config location provided
> > > at configure time. otherwise I need to set PATH every time I run ninja
> > > in case it tries to reconfigure. I guess that's what "TODO llvm-prefix" 
> > > will achieve, right?
> > 
> > I'm not sure what the right way to solve this is, maybe to cache any relavent
> > environment variables between runs in meson itself, since pkg-config has the
> > same problem with PKG_CONFIG_PATH. ATM there is no way to implement the
> > llvm-prefix in meson the way it is in autotools.
> 
> would it be easier to explicitly set location of llvm-config and
> libclc.pc?
> currently it works OK with system packages,
> you can add Tested-by: Jan Vesely <jan.vesely at rutgers.edu>
> 
> I'd need a way to permanently redirect the configuration to use local
> builds of both llvm and libclc to use meson as my daily driver.
> 
> >    
> > 
> > > 
> > > in the end I got meson built clover to run (clinfo + simple demo) on my
> > > turks with these changes:
> > > * build and install libdrm_amdgpu -- should not be necessary for r600g
> > > only build
> > > * switch to distro (fedora) provided libclc and llvm -- avoids rtti
> > > build problem (note libclc is just tagging along llvm since my local
> > > builds install headers to the same location)
> > > * fiddle with pipe-loader dir, for some reason LIBGL_DRIVERS_PATH did
> > > not work when pointed to meson built pipe_r600.so. I'm not sure if this
> > > is meson specific, it might be just my ignorance.
> > 
> > I'm not certain, though Curro probably knows, but the dynamic pipeloader is
> > hard-coded to search $install/$libdir/gallium-pipe for pipe drivers, so you may
> > need to run ninja install to make it work. Alternatively LD_LIBRARY_PATH might
> > work as well.
> 
> I assumed that it was some loader configuration outside meson. the
> surprising part was that it tried to open cwd local paths:
> openat(AT_FDCWD, "lib64/gallium-pipe/pipe_r600.so", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
> 
> Is this expected without explicitly setting install prefix?
> 
> Jan

If you don't set a prefix you'll get the system default, for fedora (because of
the merged /usr) that's /. Does it work with autotools without install? I can't
image it would. But dynamic library loading in C is hardly my domain of
expertise so I could be totally wrong :)

Dylan
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