--- gcc/config/svr4.h	2018/04/24 18:27:35	1.1.1.8
+++ gcc/config/svr4.h	2018/04/24 18:33:34	1.1.1.9
@@ -273,15 +273,23 @@ do {				 				\
 #define DBX_BLOCKS_FUNCTION_RELATIVE 1
 
 /* When using stabs, gcc2_compiled must be a stabs entry, not an
-   ordinary symbol, or gdb won't see it.  The stabs entry must be
-   before the N_SO in order for gdb to find it.  */
+   ordinary symbol, or gdb won't see it.  Furthermore, since gdb reads
+   the input piecemeal, starting with each N_SO, it's a lot easier if
+   the gcc2 flag symbol is *after* the N_SO rather than before it.  So
+   we emit an N_OPT stab there.  */
 
 #define ASM_IDENTIFY_GCC(FILE)						\
 do									\
   {									\
     if (write_symbols != DBX_DEBUG)					\
       fputs ("gcc2_compiled.:\n", FILE);				\
-    else								\
+  }									\
+while (0)
+
+#define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE)				\
+do									\
+  {									\
+    if (write_symbols == DBX_DEBUG)					\
       fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE);	\
   }									\
 while (0)