Merge pull request #14432 from NixOS/meson-darwin-soname

meson: Also split version string at '+' for Darwin

Author: Ericson2314

nix-meson-build-support/common/meson.build

@@ -42,8 +42,8 @@ if cxx.get_id() == 'clang'
   add_project_arguments('-fpch-instantiate-templates', language : 'cpp')
 endif
 
-# Darwin ld doesn't like "X.Y.Zpre"
-nix_soversion = meson.project_version().split('pre')[0]
+# Darwin ld doesn't like "X.Y.ZpreABCD+W"
+nix_soversion = meson.project_version().split('+')[0].split('pre')[0]
 
 subdir('assert-fail')
 subdir('asan-options')