diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ad72cd8b26..f43ab29eab 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2018-07-16  Tom Tromey  <tom@tromey.com>
+
+	* stabsread.h (processing_gcc_compilation): Move from buildsym.h.
+	* dwarf2read.c (dwarf2_start_symtab): Don't set
+	processing_gcc_compilation.
+	* buildsym.h (processing_gcc_compilation): Move to stabsread.h.
+
 2018-07-16  Tom Tromey  <tom@tromey.com>
 
 	* stabsread.h (HASHSIZE, hashname, symnum, next_symbol_text)
diff --git a/gdb/buildsym.h b/gdb/buildsym.h
index 0b19c39305..01d9acc2c9 100644
--- a/gdb/buildsym.h
+++ b/gdb/buildsym.h
@@ -66,11 +66,6 @@ struct subfile
 
 EXTERN struct subfile *current_subfile;
 
-/* Global variable which, when set, indicates that we are processing a
-   .o file compiled with gcc */
-
-EXTERN unsigned char processing_gcc_compilation;
-
 /* Record the symbols defined for each context in a list.  We don't
    create a struct block for the context until we know how long to
    make it.  */
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 372f45ee17..ff9d72ce78 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -21026,9 +21026,6 @@ dwarf2_start_symtab (struct dwarf2_cu *cu,
   record_debugformat ("DWARF 2");
   record_producer (cu->producer);
 
-  /* We assume that we're processing GCC output.  */
-  processing_gcc_compilation = 2;
-
   cu->processing_has_namespace_info = 0;
 
   return cust;
diff --git a/gdb/stabsread.h b/gdb/stabsread.h
index 38e001a254..0da88f4142 100644
--- a/gdb/stabsread.h
+++ b/gdb/stabsread.h
@@ -48,6 +48,11 @@ EXTERN unsigned int symnum;
 
 EXTERN const char *(*next_symbol_text_func) (struct objfile *);
 
+/* Global variable which, when set, indicates that we are processing a
+   .o file compiled with gcc */
+
+EXTERN unsigned char processing_gcc_compilation;
+
 /* Hash table of global symbols whose values are not known yet.
    They are chained thru the SYMBOL_VALUE_CHAIN, since we don't
    have the correct data for that slot yet.