libQGLViewer: add new package (#20164)

lib/spack/docs/build_systems/qmakepackage.rst

@@ -108,6 +108,19 @@ override the ``qmake_args`` method like so:
 
 This method can be used to pass flags as well as variables.
 
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+``*.pro`` file in a sub-directory
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If the ``*.pro`` file used to tell QMake how to build the package is
+found in a sub-directory, you can tell Spack to run all phases in this
+sub-directory by adding the following to the package:
+
+.. code-block:: python
+
+   build_directory = 'src'
+
+
 ^^^^^^^^^^^^^^^^^^^^^^
 External documentation
 ^^^^^^^^^^^^^^^^^^^^^^

lib/spack/spack/build_systems/qmake.py

@@ -6,6 +6,7 @@
 
 import inspect
 
+from llnl.util.filesystem import working_dir
 from spack.directives import depends_on
 from spack.package import PackageBase, run_after
 
@@ -37,6 +38,11 @@ class QMakePackage(PackageBase):
 
     depends_on('qt', type='build')
 
+    @property
+    def build_directory(self):
+        """The directory containing the ``*.pro`` file."""
+        return self.stage.source_path
+
     def qmake_args(self):
         """Produces a list containing all the arguments that must be passed to
         qmake
@@ -45,22 +51,30 @@ def qmake_args(self):
 
     def qmake(self, spec, prefix):
         """Run ``qmake`` to configure the project and generate a Makefile."""
-        inspect.getmodule(self).qmake(*self.qmake_args())
+
+        with working_dir(self.build_directory):
+            inspect.getmodule(self).qmake(*self.qmake_args())
 
     def build(self, spec, prefix):
         """Make the build targets"""
-        inspect.getmodule(self).make()
+
+        with working_dir(self.build_directory):
+            inspect.getmodule(self).make()
 
     def install(self, spec, prefix):
         """Make the install targets"""
-        inspect.getmodule(self).make('install')
+
+        with working_dir(self.build_directory):
+            inspect.getmodule(self).make('install')
 
     # Tests
 
     def check(self):
         """Searches the Makefile for a ``check:`` target and runs it if found.
         """
-        self._if_make_target_execute('check')
+
+        with working_dir(self.build_directory):
+            self._if_make_target_execute('check')
 
     run_after('build')(PackageBase._run_default_build_time_test_callbacks)