Link to libatomic on riscv64

Future GHC versions already check for that:

https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6820/commits

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

ghc.spec

@@ -52,7 +52,7 @@ Version: 8.10.7
 # - release can only be reset if *all* library versions get bumped simultaneously
 #   (sometimes after a major release)
 # - minor release numbers for a branch should be incremented monotonically
-Release: 121%{?dist}
+Release: 121.0.riscv64%{?dist}
 Summary: Glasgow Haskell Compiler
 
 License: BSD and HaskellReport
@@ -415,6 +415,7 @@ export CC=%{_bindir}/gcc
   --enable-unregisterised \
 %endif
   %{?with_dwarf:--enable-dwarf-unwind} \
+  LIBS="-latomic" \
 %{nil}
 
 # avoid "ghc: hGetContents: invalid argument (invalid byte sequence)"
@@ -673,6 +674,9 @@ env -C %{ghc_html_libraries_dir} ./gen_contents_index
 
 
 %changelog
+* Mon Oct 24 2022 David Abdurachmanov <davidlt@rivosinc.com> - 8.10.7-121.0.riscv64
+- Link to libatomic for riscv64
+
 * Sat Aug  6 2022 Jens Petersen <petersen@redhat.com> - 8.10.7-121
 - ghc-compiler conflicts with ghc8.10-compiler-8.10.7