pkgconfig dep: Special-case D link arguments

The D compiler does not implement find_library(), so we can't resolve
these libraries to absolute paths. Keep the old behaviour till that
can be done.

mesonbuild/dependencies/base.py

@@ -602,7 +602,10 @@ class PkgConfigDependency(ExternalDependency):
         # Libraries that are provided by the toolchain or are not found by
         # find_library() will be added with -L -l pairs.
         for lib in self._convert_mingw_paths(shlex.split(out)):
-            if lib.startswith('-L'):
+            if lib.startswith(('-L-l', '-L-L')):
+                # These are D language arguments, add them as-is
+                pass
+            elif lib.startswith('-L'):
                 libpaths.add(lib[2:])
                 continue
             elif lib.startswith('-l'):
@@ -610,7 +613,8 @@ class PkgConfigDependency(ExternalDependency):
                     args = self.clib_compiler.find_library(lib[2:], self.env,
                                                            list(libpaths), libtype)
                 # If the project only uses a non-clib language such as D, Rust,
-                # C#, Python, etc, all we can do is limp along.
+                # C#, Python, etc, all we can do is limp along by adding the
+                # arguments as-is and then adding the libpaths at the end.
                 else:
                     args = None
                 if args: