Merge pull request #278 from eschnett/eschnett/hdf5-variants

Enable several variants for HDF5

var/spack/packages/hdf5/package.py

@@ -15,7 +15,10 @@ class Hdf5(Package):
     version('1.8.15', '03cccb5b33dbe975fdcd8ae9dc021f24')
     version('1.8.13', 'c03426e9e77d7766944654280b467289')
 
+    variant('cxx', default=True, description='Enable C++ support')
+    variant('fortran', default=True, description='Enable Fortran support')
     variant('mpi', default=False, description='Enable MPI support')
+    variant('threadsafe', default=False, description='Enable multithreading')
 
     depends_on("mpi", when='+mpi')
     depends_on("zlib")
@@ -23,11 +26,36 @@ class Hdf5(Package):
     # TODO: currently hard-coded to use OpenMPI
     def install(self, spec, prefix):
         extra_args = []
+        if '+cxx' in spec:
+            extra_args.extend([
+                '--enable-cxx'
+            ])
+        if '+fortran' in spec:
+            extra_args.extend([
+                '--enable-fortran',
+                '--enable-fortran2003'
+            ])
         if '+mpi' in spec:
+            # The HDF5 configure script warns if cxx and mpi are enabled
+            # together. There doesn't seem to be a real reason for this, except
+            # that parts of the MPI interface are not accessible via the C++
+            # interface. Since they are still accessible via the C interface,
+            # this is not actually a problem.
             extra_args.extend([
                 "--enable-parallel",
+                "--enable-unsupported",
                 "CC=%s" % spec['mpi'].prefix.bin + "/mpicc",
                 "CXX=%s" % spec['mpi'].prefix.bin + "/mpic++",
+                "FC=%s" % spec['mpi'].prefix.bin + "/mpifort",
+            ])
+        if '+threads' in spec:
+            if '+cxx' in spec or '+fortran' in spec:
+                die("Cannot use variant +threads with either +cxx or +fortran")
+            extra_args.extend([
+                '--enable-threadsafe',
+                '--disable-hl',
+                'CPPFLAGS=-DHDatexit=""',
+                'CFLAGS=-DHDatexit=""'
             ])
 
         configure(