arpack: add ISO C binding and top arpack-mpi attribute (#357259)

pkgs/by-name/ar/arpack/package.nix

@@ -36,6 +36,7 @@ stdenv.mkDerivation rec {
     "-DBUILD_SHARED_LIBS=ON"
     "-DINTERFACE64=${if blas.isILP64 then "1" else "0"}"
     "-DMPI=${if useMpi then "ON" else "OFF"}"
+    "-DICB=ON"
   ];
 
   preCheck = ''

pkgs/top-level/all-packages.nix

@@ -1660,6 +1660,8 @@ with pkgs;
     stdenv = gccStdenv;
   };
 
+  arpack-mpi = arpack.override { useMpi = true; };
+
   inherit (callPackages ../data/fonts/arphic {})
     arphic-ukai arphic-uming;