Add support for riscv64

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

petsc.spec

@@ -180,8 +180,10 @@
   --with-sundials-include=%{_includedir} \\\
   --with-sundials-lib="-lsundials_nvecserial -lsundials_cvode" \\\
  %endif \
-  --with-pthread=1 \\\
-  --with-valgrind=1
+ %ifarch %{valgrind_arches} \
+  --with-valgrind=1 \\\
+ %endif \
+  --with-pthread=1
 
 %global petsc_mpibuild_options \\\
  %if %{with debug} \
@@ -279,9 +281,11 @@
   --with-fftw-include= \\\
   --with-fftw-lib="-L$MPI_LIB -lfftw3_mpi -lfftw3" \\\
  %endif \
-  --with-pthread=1 \\\
-  --with-valgrind=1
-  
+ %ifarch %{valgrind_arches} \
+  --with-valgrind=1 \\\
+ %endif \
+  --with-pthread=1
+
 %global mpichversion %(rpm -qi mpich | awk -F': ' '/Version/ {print $2}')
 %global openmpiversion %(rpm -qi openmpi | awk -F': ' '/Version/ {print $2}')
 %global majorver 3
@@ -290,7 +294,7 @@
 Name:    petsc
 Summary: Portable Extensible Toolkit for Scientific Computation
 Version: %{releasever}.4
-Release: 15%{?dist}
+Release: 15.0.riscv64%{?dist}
 License: BSD
 URL:     https://petsc.org/
 Source0: https://ftp.mcs.anl.gov/pub/petsc/release-snapshots/petsc-with-docs-%{version}.tar.gz
@@ -350,7 +354,9 @@ BuildRequires: tcsh
 BuildRequires: tetgen-devel
 %endif
 BuildRequires: xorg-x11-server-Xvfb
+%ifarch %{valgrind_arches}
 BuildRequires: valgrind-devel
+%endif
 
 %description
 PETSc, pronounced PET-see (the S is silent), is a suite of data structures
@@ -618,6 +624,10 @@ pushd %{name}-%{version}
 popd
 
 %build
+%ifarch riscv64
+# Likely running out of memory during build
+%global _lto_cflags %{nil}
+%endif
 pushd %{name}-%{version}
 %configure --with-cc=gcc --with-cxx=g++ --with-fc=gfortran \
  %{petsc_build_options} \
@@ -1168,6 +1178,9 @@ xvfb-run -a make MAKE_NP=$RPM_BUILD_NCPUS all test -C build64 V=1 MPIEXEC='%{_bu
 %endif
 
 %changelog
+* Fri Mar 24 2023 David Abdurachmanov <davidlt@rivosinc.com> - 3.17.4-15.0.riscv64
+- Add support for riscv64
+
 * Fri Mar 03 2023 Orion Poplawski <orion@nwra.com> - 3.17.4-15
 - Rebuild for mpich 4.0.3