--- spack-src/Lib/distutils/unixccompiler.py.org	2022-01-31 14:42:34.000000000 +0900
+++ spack-src/Lib/distutils/unixccompiler.py	2022-01-31 14:43:19.000000000 +0900
@@ -212,7 +212,7 @@
 
     def _is_gcc(self, compiler_name):
         # clang uses same syntax for rpath as gcc
-        return any(name in compiler_name for name in ("gcc", "g++", "clang"))
+        return any(name in compiler_name for name in ("gcc", "g++", "clang", "fcc", "FCC"))
 
     def runtime_library_dir_option(self, dir):
         # XXX Hackish, at the very least.  See Python bug #445902: