File riscv-no-fpu-excp.patch of Package f2c

Index: f2c-20210928/libf2c/uninit.c
===================================================================
--- f2c-20210928.orig/libf2c/uninit.c
+++ f2c-20210928/libf2c/uninit.c
@@ -231,7 +231,7 @@ ieee0(Void)
 	}
 #endif /* mips */
 
-#ifdef __linux__
+#if defined __linux__ && !defined __riscv
 #define IEEE0_done
 #include "fpu_control.h"