sw4lite: fix build errors and add variants (#5944)

* sw4lite: fix build errors and add variants

* sw4lite: change linking against blas and lapack

* change order of blas and lapack

* satisfy flake8 requirements

* Update package.py

var/spack/repos/builtin/packages/sw4lite/package.py

@@ -23,32 +23,70 @@
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ##############################################################################
 from spack import *
+import glob
 
 
 class Sw4lite(MakefilePackage):
     """Sw4lite is a bare bone version of SW4 intended for testing
     performance optimizations in a few important numerical kernels of SW4."""
 
-    tags = ['proxy-app']
+    tags = ['proxy-app', 'ecp-proxy-app']
 
-    homepage = "https://github.com/geodynamics/sw4lite"
+    homepage = "https://geodynamics.org/cig/software/sw4"
     url      = "https://github.com/geodynamics/sw4lite/archive/v1.0.zip"
 
     version('develop', git='https://github.com/geodynamics/sw4lite',
             branch='master')
     version('1.0', '3d911165f4f2ff6d5f9c1bd56ab6723f')
 
+    variant('openmp', default=True, description='Build with OpenMP support')
+    variant('precision', default='double', values=('float', 'double'),
+            multi=False, description='Floating point precision')
+    variant('ckernel', default=False, description='C or Fortran kernel')
+
+    depends_on('blas')
+    depends_on('lapack')
     depends_on('mpi')
 
     @property
     def build_targets(self):
         targets = []
         spec = self.spec
-        targets.append('ckernel=yes')
+
+        if spec.variants['precision'].value == 'double':
+            cxxflags = ['-I../src', '-I../src/double']
+        else:
+            cxxflags = ['-I../src', '-I../src/float']
+        cflags = []
+        fflags = []
+
+        if '+openmp' in self.spec:
+            cflags.append('-DSW4_OPENMP')
+            cflags.append(self.compiler.openmp_flag)
+            cxxflags.append('-DSW4_OPENMP')
+            cxxflags.append(self.compiler.openmp_flag)
+            fflags.append(self.compiler.openmp_flag)
+
+        if spec.variants['ckernel'].value is True:
+            cxxflags.append('-DSW4_CROUTINES')
+            targets.append('ckernel=yes')
+
         targets.append('FC=' + spec['mpi'].mpifc)
         targets.append('CXX=' + spec['mpi'].mpicxx)
+
+        targets.append('CFLAGS={0}'.format(' '.join(cflags)))
+        targets.append('CXXFLAGS={0}'.format(' '.join(cxxflags)))
+        targets.append('FFLAGS={0}'.format(' '.join(fflags)))
+
+        targets.append('EXTRA_CXX_FLAGS=')
+        targets.append('EXTRA_FORT_FLAGS=')
+        lapack_blas = spec['lapack'].libs + spec['blas'].libs
+        targets.append('EXTRA_LINK_FLAGS={0}'.format(lapack_blas.ld_flags))
+
         return targets
 
     def install(self, spec, prefix):
         mkdir(prefix.bin)
-        install('optimize_c/sw4lite', prefix.bin)
+        exe_name = glob.glob('*/sw4lite')[0]
+        install(exe_name, prefix.bin)
+        install_tree('tests', prefix.tests)