panfrost: build panfrost_compile for -Dtools=panfrost

This allows building tools for cross-compiling without building gallium
or vulkan drivers unnecessarily.

Backport-to: 25.1
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Janne Grunau <j@jannau.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34693>
(cherry picked from commit 674c96ad0a4a9b57342c90135fbceb696d7aae46)

.pick_status.json

@@ -234,7 +234,7 @@
         "description": "panfrost: build panfrost_compile for -Dtools=panfrost",
         "nominated": true,
         "nomination_type": 4,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null,
         "notes": null

docs/drivers/panfrost.rst

@@ -60,8 +60,8 @@ LLVM is required by Panfrost's compilers at build time.
 
 In case of cross compilation without LLVM,
 you can build and install the required tools on the host (with LLVM installed) with
-``meson . build-host/ -Dvulkan-drivers=panfrost -Dgallium-drivers=panfrost
--Dmesa-clc=enabled -Dinstall-mesa-clc=true -Dprecomp-compiler=enabled -Dinstall-precomp-compiler=true``
+``meson . build-host/ -Dtools=panfrost -Dmesa-clc=enabled -Dinstall-mesa-clc=true
+-Dprecomp-compiler=enabled -Dinstall-precomp-compiler=true``
 and then use ``-Dmesa-clc=system -Dprecomp-compiler=system`` on the cross compile side.
 
 For general information on building Mesa, read :doc:`the install documentation

src/panfrost/meson.build

@@ -15,9 +15,12 @@ subdir('util')
 subdir('midgard')
 subdir('compiler')
 
-if with_gallium_panfrost or with_panfrost_vk
+if with_gallium_panfrost or with_panfrost_vk or with_tools.contains('panfrost')
    subdir('lib')
    subdir('clc')
+endif
+
+if with_gallium_panfrost or with_panfrost_vk
    subdir('libpan')
    subdir('perf')
 endif