Ticket #49720: Portfile-alps.diff

Portfile

@@ -4 +4 @@
 PortSystem              1.0
 PortGroup               cmake 1.0
 PortGroup               conflicts_build 1.0
+PortGroup               mpi 1.0
 
 name                    alps
 version                 2.1.1
@@ -12 +13 @@
 platforms               darwin
 license                 Restrictive
 # http://alps.comp-phys.org/static/software/ALPS/LICENSE.txt/
-maintainers             gmail.com:gamperl
+maintainers             gmail.com:gamperl openmaintainer
 
 description             Algorithms and Libraries for Physics Simulations
 
@@ -31 +32 @@
 
 depends_lib             port:hdf5
 
+mpi.enforce_variant     hdf5
+
 # alps has its own internal boost it wants to use, and fails if MacPorts' newer boost is active.
 conflicts_build         boost
 
+compilers.choose        cc cxx
+# clang doesn't work for +applications or with MPI
+mpi.setup               -clang
+# replace ancient llvm we would otherwise be using by default
+if {![c_variant_isset]} {
+    default_variants-append +${compilers.gcc_default}
+}
+
 patchfiles              patch-CMakeLists.txt.diff \
                         patch-config-FindLapack.cmake.diff
 
@@ -61 +72 @@
     # alps/applications/dmrg/dmrg/dmrg.h:610:49: error: expected expression
     #     std::string name = simplify_name(it->get<1>());
     #                                                 ^
-    compiler.blacklist  *clang*
-    
     configure.args-delete -DALPS_BUILD_APPLICATIONS=OFF
 }
 
-# why not mpich also as a variant?
-variant openmpi         description {Build with MPI support} {
-    depends_lib-append  port:openmpi
-    
-    configure.args-delete -DALPS_ENABLE_MPI=OFF    
-#-- Could NOT find MPI_C (missing:  MPI_C_LIBRARIES MPI_C_INCLUDE_PATH)
-#-- Could NOT find MPI_CXX (missing:  MPI_CXX_LIBRARIES MPI_CXX_INCLUDE_PATH)
+pre-configure {
+    if {[mpi_variant_isset]} {
+        configure.args-delete -DALPS_ENABLE_MPI=OFF    
+        configure.args-append -DMPI_C=${mpi.cc} -DMPI_CXX=${mpi.cxx}
+    }
 }
 
 set pythons_suffixes {26 27}