[Mesa-dev] Few issues with Meson

[Dylan Baker]

This is my cross file (Arch doesn't have a pkg-config for x86, so I have a shell
wrapper that sets PKG_CONFIG_PATH), you'll probably need to adjust some paths

```
[binaries]
c = '/usr/bin/gcc'
cpp = '/usr/bin/g++'
ar = '/usr/bin/ar'
strip = '/usr/bin/strip'
pkgconfig = '/home/dylan/.local/bin/pkg-config-lib32'
llvm-config = '/usr/bin/llvm-config32'

[properties]
c_args = ['-m32']
c_link_args = ['-m32']
cpp_args = ['-m32']
cpp_link_args = ['-m32']

[host_machine]
system = 'linux'
cpu_family = 'x86'
cpu = 'i686'
endian = 'little'

# vim: ft=dosini
```

meson build-x66 --cross-file <that file> <options> should give you a working
mesa for your arch.

There's some upstream discussion on how to choose llvm-config for non-cross
compilation cases, but that hasn't moved a whole lot recently.

Dylan

Quoting Mike Lothian (2018-03-12 10:57:01)
> Hi Dylan
> 
> Do you have the link to patch on patchwork? I'll give it a go
> 
> I'm using meson 0.45 however the cross-file requires more than just defining
> llvm-config, everything else is normally picked up from what portage is setting
> in the build environment - though strangely not if clang is used - I'll look
> into that sometime
> 
> Regards
> 
> Mike
> 
> On Fri, 9 Mar 2018 at 16:37 Dylan Baker <dylan at pnwbakers.com> wrote:
> 
>     Quoting Mike Lothian (2018-03-06 05:07:34)
>     > Hi
>     >
>     > When compiling wine I also noticed that the d3d.pc files didn't have
>     moduledir
>     > set, so wine couldn't find it
>     >
>     > configure: error: pkg-config couldn't find Gallium Nine module
> 
>     I've sent a patch for this.
> 
>     >
>     > Regards
>     >
>     > Mike
>     >
>     > On Tue, 6 Mar 2018 at 02:17 Mike Lothian <mike at fireburn.co.uk> wrote:
>     >
>     >     Hi
>     >
>     >     I've been trying to get a Gentoo ebuild ready for meson
>     >
>     >     I've had to fudge the llvm-config for cross compiling a 32bit mesa on
>     >     a 64bit machine
> 
>     If you're using a new enough meson (0.45) you can specify the llvm-config
>     you
>     want to use in the cross file.
> 
>     >
>     >     I notice that -Dvulkan-drivers= doesn't accept intel,radeon like
>     >     autotools used to, it also seems as long as one value is correct the
>     >     other is ignored
> 
>     we're using amd instead of radeon. After 18.0 branches I want to bump the
>     meson
>     requirement so we can use meson's list argument type, which will check for
>     such
>     problems.
> 
>     >
>     >     Also -Dva-libs-path= doesn't play well with absolute paths, or rather
>     >     install_megadrivers.py is doing something strange - normally gentoo
>     >     installs everything to a temporary image path then puts those files
>     >     into the live system. It seems install_megadrivers.py doesn't do this
>     >     and installs directly to the live system - I worked around it by
>     >     dropping the /usr
> 
>     There's a patch from someone in FreeBSD that might fix this (the way we do
>     symlinking in install_megadrivers is wrong).
> 
>     Sorry it took me so long to find this email, notmuch applied some odd tags
>     to
>     it.
> 
>     Dylan
> 
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