Index: linux-x86-64-low.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbserver/linux-x86-64-low.c,v
retrieving revision 1.8
diff -u -p -r1.8 linux-x86-64-low.c
--- linux-x86-64-low.c	16 Oct 2004 17:42:00 -0000	1.8
+++ linux-x86-64-low.c	21 Oct 2004 04:05:38 -0000
@@ -47,6 +47,15 @@
 #define PTRACE_ARCH_PRCTL      30
 #endif
 
+/* The following definitions come from prctl.h, but may be absent
+   for certain configurations.  */
+#ifndef ARCH_GET_FS
+#define ARCH_SET_GS 0x1001
+#define ARCH_SET_FS 0x1002
+#define ARCH_GET_FS 0x1003
+#define ARCH_GET_GS 0x1004
+#endif
+
 static int x86_64_regmap[] = {
   RAX * 8, RBX * 8, RCX * 8, RDX * 8,
   RSI * 8, RDI * 8, RBP * 8, RSP * 8,