Add a test against __GNUC__ to target gcc, whatever the arch is.
Index: syrthes/include/f2c_syrthes.h
===================================================================
--- syrthes.orig/include/f2c_syrthes.h	2009-09-27 22:33:10.000000000 +0200
+++ syrthes/include/f2c_syrthes.h	2009-09-27 22:35:40.000000000 +0200
@@ -1,3 +1,9 @@
+#ifdef __GNUC__
+#define name2(a,b)  a##b
+#define proc(x,y) name2(x,_)
+#define proci(x)  x
+
+#else
 #ifdef __sgi
 #define name2(a,b)  a##b
 #define proc(x,y) name2(x,_)
@@ -55,3 +61,4 @@
 #endif
 #endif
 #endif
+#endif
