devenv: Use PkgConfigDependency.get_env()

This ensures that PKG_CONFIG_PATH, PKG_CONFIG_LIBDIR and
PKG_CONFIG_SYSROOT_DIR are also set properly.

mesonbuild/mdevenv.py

@@ -33,10 +33,6 @@ def get_env(b: build.Build, build_dir: str) -> T.Tuple[T.Dict[str, str], T.Set[s
     extra_env.set('MESON_DEVENV', ['1'])
     extra_env.set('MESON_PROJECT_NAME', [b.project_name])
 
-    meson_uninstalled = Path(build_dir) / 'meson-uninstalled'
-    if meson_uninstalled.is_dir():
-        extra_env.prepend('PKG_CONFIG_PATH', [str(meson_uninstalled)])
-
     env = os.environ.copy()
     varnames = set()
     for i in itertools.chain(b.devenv, {extra_env}):

mesonbuild/msetup.py

@@ -28,7 +28,8 @@ from . import environment, interpreter, mesonlib
 from . import build
 from . import mlog, coredata
 from . import mintro
-from .mesonlib import MesonException
+from .mesonlib import MesonException, MachineChoice
+from .dependencies import PkgConfigDependency
 
 git_ignore_file = '''# This file is autogenerated by Meson. If you change or delete it, it won't be recreated.
 *
@@ -290,6 +291,7 @@ class MesonApp:
 
     def _finalize_devenv(self, b: build.Build, intr: interpreter.Interpreter) -> None:
         b.devenv.append(intr.backend.get_devenv())
+        b.devenv.append(PkgConfigDependency.get_env(intr.environment, MachineChoice.HOST, uninstalled=True))
         for mod in intr.modules.values():
             devenv = mod.get_devenv()
             if devenv: