diff --git a/mumps.changes b/mumps.changes
index 0c42001..2518213 100644
--- a/mumps.changes
+++ b/mumps.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Thu Jul 23 16:29:56 UTC 2020 - Egbert Eich <eich@suse.com>
+
+- Add build support for gcc10 to HPC build (bsc#1174439). 
+  * Remove explicit build dependency for libgomp1.
+  * Add missing compiler versions to openblas and scalapack
+    build dependencies.
+- Add build support for openmpi4.
+
 -------------------------------------------------------------------
 Tue Jun 30 20:05:56 UTC 2020 - Egbert Eich <eich@suse.com>
 
diff --git a/mumps.spec b/mumps.spec
index 8bba38d..fbcddd4 100644
--- a/mumps.spec
+++ b/mumps.spec
@@ -74,6 +74,13 @@ ExclusiveArch:  do_not_build
 %bcond_with hpc
 %endif
 
+%if "%{flavor}" == "openmpi4"
+%define mpi_family  openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 4
+%bcond_with hpc
+%endif
+
 %if "%{flavor}" == "mvapich2"
 %define mpi_family  mvapich2
 %define mumps_f77_mpilibs -lfmpich -lmpich
@@ -105,6 +112,14 @@ ExclusiveArch:  do_not_build
 %bcond_without scotch
 %endif
 
+%if "%{flavor}" == "scotch-openmpi4"
+%define mpi_family  openmpi
+%define mpi_ver 4
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%bcond_with hpc
+%bcond_without scotch
+%endif
+
 %if "%{flavor}" == "scotch-mvapich2"
 %define mpi_family  mvapich2
 %define mumps_f77_mpilibs -lfmpich -lmpich
@@ -142,6 +157,16 @@ ExclusiveArch:  do_not_build
 %bcond_without hpc
 %endif
 
+%if "%{flavor}" == "gnu-openmpi4-hpc"
+%{?DisOMPI3}
+%undefine c_f_ver
+# macro mpi is used by macros for master package
+%global mpi_family openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 4
+%bcond_without hpc
+%endif
+
 %if "%{flavor}" == "gnu-mvapich2-hpc"
 %undefine c_f_ver
 # macro mpi is used by macros for master package
@@ -187,6 +212,16 @@ ExclusiveArch:  do_not_build
 %bcond_without hpc
 %endif
 
+%if "%{flavor}" == "gnu7-openmpi4-hpc"
+%{?DisOMPI3}
+%define c_f_ver 7
+# macro mpi is used by macros for master package
+%global mpi_family openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 4
+%bcond_without hpc
+%endif
+
 %if "%{flavor}" == "gnu7-mvapich2-hpc"
 %define c_f_ver 7
 # macro mpi is used by macros for master package
@@ -232,6 +267,16 @@ ExclusiveArch:  do_not_build
 %bcond_without hpc
 %endif
 
+%if "%{flavor}" == "gnu8-openmpi4-hpc"
+%{?DisOMPI3}
+%define c_f_ver 8
+# macro mpi is used by macros for master package
+%global mpi_family openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 4
+%bcond_without hpc
+%endif
+
 %if "%{flavor}" == "gnu8-mvapich2-hpc"
 %define c_f_ver 8
 # macro mpi is used by macros for master package
@@ -277,6 +322,16 @@ ExclusiveArch:  do_not_build
 %bcond_without hpc
 %endif
 
+%if "%{flavor}" == "gnu9-openmpi4-hpc"
+%{?DisOMPI3}
+%define c_f_ver 9
+# macro mpi is used by macros for master package
+%global mpi_family openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 4
+%bcond_without hpc
+%endif
+
 %if "%{flavor}" == "gnu9-mvapich2-hpc"
 %define c_f_ver 9
 # macro mpi is used by macros for master package
@@ -292,6 +347,61 @@ ExclusiveArch:  do_not_build
 %bcond_without hpc
 %endif
 
+%if "%{flavor}" == "gnu10-openmpi-hpc"
+%{?DisOMPI1}
+%define c_f_ver 10
+# macro mpi is used by macros for master package
+%global mpi_family openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 1
+%bcond_without hpc
+%endif
+
+%if "%{flavor}" == "gnu10-openmpi2-hpc"
+%{?DisOMPI2}
+%define c_f_ver 10
+# macro mpi is used by macros for master package
+%global mpi_family openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 2
+%bcond_without hpc
+%endif
+
+%if "%{flavor}" == "gnu10-openmpi3-hpc"
+%{?DisOMPI3}
+%define c_f_ver 10
+# macro mpi is used by macros for master package
+%global mpi_family openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 3
+%bcond_without hpc
+%endif
+
+%if "%{flavor}" == "gnu10-openmpi4-hpc"
+%{?DisOMPI3}
+%define c_f_ver 10
+# macro mpi is used by macros for master package
+%global mpi_family openmpi
+%define mumps_f77_mpilibs -lmpi_mpifh -lmpi
+%define mpi_ver 4
+%bcond_without hpc
+%endif
+
+%if "%{flavor}" == "gnu10-mvapich2-hpc"
+%define c_f_ver 10
+# macro mpi is used by macros for master package
+%global mpi_family mvapich2
+%define mumps_f77_mpilibs -lfmpich -lmpich
+%undefine mpi_ver 
+%bcond_without hpc
+%endif
+
+%if "%{flavor}" == "gnu10-mpich-hpc"
+%define c_f_ver 10
+%global mpi_family mpich
+%bcond_without hpc
+%endif
+
 %ifarch i586 s390 ppc armv7l
 ExclusiveArch:  do_not_build
 %endif
@@ -370,9 +480,8 @@ BuildRequires:  lapack-devel
 BuildRequires:  %{compiler_family}%{?c_f_ver}-compilers-hpc-macros-devel
 BuildRequires:  %{mpi_family}%{?mpi_ver}-%{compiler_family}%{?c_f_ver}-hpc-macros-devel
 BuildRequires:  fdupes
-BuildRequires:  libgomp1
-BuildRequires:  libopenblas-%{compiler_family}-hpc >=  %{openblas_vers}
-BuildRequires:  libscalapack2-%{compiler_family}-%{mpi_family}%{?mpi_ver}-hpc-devel
+BuildRequires:  libopenblas-%{compiler_family}%{?c_f_ver}-hpc >=  %{openblas_vers}
+BuildRequires:  libscalapack2-%{compiler_family}%{?c_f_ver}-%{mpi_family}%{?mpi_ver}-hpc-devel
 BuildRequires:  suse-hpc
 %endif # hpc