Mesa (main): meson: deprecate specifying osmesa-bits

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Module: Mesa
Branch: main
Commit: 202cab3d30808a96677f8bcb4b5f80a0cfbfc615
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=202cab3d30808a96677f8bcb4b5f80a0cfbfc615

Author: Erik Faye-Lund <erik.faye-lund at collabora.com>
Date:   Fri Apr 29 09:15:58 2022 +0200

meson: deprecate specifying osmesa-bits

This option has no meaningful effect any more other than pointlessly
renaming the the library. Let's introduce a new default value called
"unspecified", and complain if it's set to anything else.

Reviewed-by: Adam Jackson <ajax at redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16213>

---

 meson.build       | 7 ++-----
 meson_options.txt | 6 +++---
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/meson.build b/meson.build
index be02b413120..9b65c152dc7 100644
--- a/meson.build
+++ b/meson.build
@@ -1985,11 +1985,8 @@ if with_osmesa
     osmesa_lib_name = 'OSMesa'
   endif
   osmesa_bits = get_option('osmesa-bits')
-  if osmesa_bits != '8'
-    if with_dri or with_glx != 'disabled'
-      error('OSMesa bits must be 8 if building glx or dri based drivers')
-    endif
-    osmesa_lib_name = osmesa_lib_name + osmesa_bits
+  if osmesa_bits != 'unspecified'
+    warning('osmesa-bits option is deprecated and have no effect, please remove it.')
   endif
 endif
 
diff --git a/meson_options.txt b/meson_options.txt
index 4332906853f..83b5ea941be 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -420,9 +420,9 @@ option(
 option(
   'osmesa-bits',
   type : 'combo',
-  value : '8',
-  choices : ['8', '16', '32'],
-  description : 'Number of channel bits for OSMesa.'
+  value : 'unspecified',
+  choices : ['unspecified', '8', '16', '32'],
+  description : 'DEPRECATED: Number of channel bits for OSMesa.'
 )
 
 option(