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authorIan Lance Taylor <ian@airs.com>2009-03-24 19:08:37 +0000
committerIan Lance Taylor <ian@airs.com>2009-03-24 19:08:37 +0000
commitafc06bb8287c9a5c81be4810fd0384e952dd19ea (patch)
treec3a8c77b95478d08bd7a76537647b7cea712cae9 /gold/yyscript.y
parentf6060a4d43e06a6ca5dd201b069ab9f29aae1b81 (diff)
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* yyscript.y (file_cmd): Recognize EXTERN.
(extern_name_list, extern_name_list_body): New nonterminals. * script.cc (script_add_extern): Define. * script-c.h (script_add_extern): Declare.
Diffstat (limited to 'gold/yyscript.y')
-rw-r--r--gold/yyscript.y22
1 files changed, 21 insertions, 1 deletions
diff --git a/gold/yyscript.y b/gold/yyscript.y
index b018005..34b8b55 100644
--- a/gold/yyscript.y
+++ b/gold/yyscript.y
@@ -234,7 +234,8 @@ linker_script:
/* A command which may appear at top level of a linker script. */
file_cmd:
- FORCE_COMMON_ALLOCATION
+ EXTERN '(' extern_name_list ')'
+ | FORCE_COMMON_ALLOCATION
{ script_set_common_allocation(closure, 1); }
| GROUP
{ script_start_group(closure); }
@@ -282,6 +283,25 @@ ignore_cmd:
OUTPUT_ARCH '(' string ')'
;
+/* A list of external undefined symbols. We put the lexer into
+ expression mode so that commas separate names; this is what the GNU
+ linker does. */
+
+extern_name_list:
+ { script_push_lex_into_expression_mode(closure); }
+ extern_name_list_body
+ { script_pop_lex_mode(closure); }
+ ;
+
+extern_name_list_body:
+ string
+ { script_add_extern(closure, $1.value, $1.length); }
+ | extern_name_list_body string
+ { script_add_extern(closure, $2.value, $2.length); }
+ | extern_name_list_body ',' string
+ { script_add_extern(closure, $3.value, $3.length); }
+ ;
+
/* A list of input file names. */
input_list:
input_list_element