Fujitsu compiler: Defining option that is always added. (spack#14657)

Author: t-karatsu

lib/spack/spack/compilers/fj.py

@@ -61,3 +61,7 @@ def c11_flag(self):
     @property
     def pic_flag(self):
         return "-KPIC"
+
+    def setup_custom_environment(self, pkg, env):
+        env.append_flags('fcc_ENV', '-Nclang')
+        env.append_flags('FCC_ENV', '-Nclang')