OPAL/2.4: build with gcc/8.4.0

- AMR and AMR_MG_SOLVER are now enabled

MPI/OPAL/build

 #!/usr/bin/env modbuild
 
-pbuild::set_download_url "http://amas.web.psi.ch/Downloads/$P/src/$P-$V.tar.bz2"
+pbuild::set_download_url "http://amas.web.psi.ch/Downloads/$P/src/$P-${V_PKG}.tar.xz"
 pbuild::add_to_group 'MPI'
 
 pbuild::pre_configure_Linux() {
@@ -13,6 +13,7 @@ pbuild::pre_configure_Linux() {
 pbuild::pre_configure() {
 	pbuild::add_configure_args "-DCMAKE_BUILD_TYPE=Release"
 	pbuild::add_configure_args "-DENABLE_SAAMG_SOLVER=TRUE"
+	pbuild::add_configure_args "-DENABLE_AMR=TRUE"
+	pbuild::add_configure_args "-DENABLE_AMR_MG_SOLVER=TRUE"
 }
 
-

MPI/OPAL/files/variants.rhel6

@@ -21,3 +21,5 @@ OPAL/1.6.1		stable		gcc/5.4.0 openmpi/1.10.4 boost/1.62.0 hdf5/1.8.18 H5hut/2.0.
 OPAL/1.6.2		stable		gcc/5.4.0 openmpi/1.10.4 boost/1.62.0 hdf5/1.8.18 H5hut/2.0.0rc3 gsl/2.2.1 trilinos/12.10.1 cuda/8.0.44 dks/1.1.2 b:cmake/3.6.3 b:OpenBLAS/0.2.19
 OPAL/2.0.0rc2		deprecated	gcc/7.3.0 openmpi/3.0.0 boost/1.66.0 hdf5/1.10.1 H5hut/2.0.0rc4 gsl/2.4 trilinos/12.12.1 b:cmake/3.9.6 b:OpenBLAS/0.2.20
 OPAL/2.0.2		stable		gcc/7.3.0 openmpi/3.1.3 boost/1.68.0 hdf5/1.10.4 H5hut/2.0.0rc5 gsl/2.5 trilinos/12.12.1 b:cmake/3.9.6 b:OpenBLAS/0.2.20
+
+OPAL/2.4.0		stable		gcc/8.4.0 openmpi/3.1.6 boost/1.73.0 hdf5/1.10.6 H5hut/2.0.0rc6 gsl/2.6 trilinos/12.18.1 amrex/18.07_3d b:cmake/3.15.5

MPI/OPAL/files/variants.slurm

+OPAL/2.4.0_slurm	stable	gcc/8.4.0 openmpi/3.1.6_slurm boost/1.73.0_slurm hdf5/1.10.6_slurm H5hut/2.0.0rc6_slurm gsl/2.6 parmetis/4.0.3_slurm trilinos/12.18.1_slurm amrex/18.07_3d_slurm b:cmake/3.15.5
+
+