make emconfigure and emcmake work, kinda

lib/spack/spack/build_environment.py

@@ -512,6 +512,7 @@ def _set_variables_for_single_module(pkg, module):
     m.make_jobs = jobs
 
     # TODO: make these build deps that can be installed if not found.
+    # FIXME: !!!!!
     m.make = MakeExecutable('make', jobs)
     m.gmake = MakeExecutable('gmake', jobs)
     m.scons = MakeExecutable('scons', jobs)
@@ -523,9 +524,15 @@ def _set_variables_for_single_module(pkg, module):
     # Find the configure script in the archive path
     # Don't use which for this; we want to find it in the current dir.
     m.configure = Executable('./configure')
+    m.emconfigure = Executable('emconfigure')
+    m.emconfigure.add_default_arg('./configure')
 
     m.meson = Executable('meson')
+
     m.cmake = Executable('cmake')
+    m.emcmake = Executable('emcmake')
+    m.emcmake.add_default_arg('cmake')
+
     m.ctest = MakeExecutable('ctest', jobs)
 
     if sys.platform == 'win32':

lib/spack/spack/build_systems/autotools.py

@@ -419,6 +419,9 @@ def configure(self, spec, prefix):
         options += self.configure_args()
 
         with working_dir(self.build_directory, create=True):
+            if self.spec.satisfies('%emscripten'):
+                inspect.getmodule(self).emconfigure(*options)
+            else:
                 inspect.getmodule(self).configure(*options)
 
     def setup_build_environment(self, env):

lib/spack/spack/build_systems/cmake.py

@@ -374,6 +374,9 @@ def cmake(self, spec, prefix):
         options += self.cmake_args()
         options.append(os.path.abspath(self.root_cmakelists_dir))
         with working_dir(self.build_directory, create=True):
+            if self.spec.satisfies('%emscripten'):
+                inspect.getmodule(self).emcmake(*options)
+            else:
                 inspect.getmodule(self).cmake(*options)
 
     def build(self, spec, prefix):