cppinit.c (BC): New macro.

	* cppinit.c (BC): New macro.
	(builtin_array): Add __GXX_WEAK__.
	* cpplib.h (builtin_type): Add BT_WEAK.
	* cppmacro.c (builtin_macro): Handle BT_WEAK.
	* defaults.h (SUPPORTS_ONE_ONLY): Define.
	* varasm.c (SUPPORTS_ONE_ONLY): Do not define.

From-SVN: r39436

gcc/ChangeLog

+2001-02-04  Mark Mitchell  <mark@codesourcery.com>
+
+	* cppinit.c (BC): New macro.
+	(builtin_array): Add __GXX_WEAK__.
+	* cpplib.h (builtin_type): Add BT_WEAK.
+	* cppmacro.c (builtin_macro): Handle BT_WEAK.
+	* defaults.h (SUPPORTS_ONE_ONLY): Define.
+	* varasm.c (SUPPORTS_ONE_ONLY): Do not define.
+
 2001-02-03  Jakub Jelinek  <jakub@redhat.com>
 
 	* cppinit.c (append_include_chain): Honor NO_IMPLICIT_EXTERN_C.
@@ -81,7 +90,7 @@ Fri Feb  2 20:03:50 2001  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 	(init_spec): Use it.
 	* testsuite/lib/g++.exp: Include the directory where libgcc
 	is located to the LD_LIBRARY_PATH list.
-	* inovke.texi (-shared-libgcc): Document the cases in which
+	* invoke.texi (-shared-libgcc): Document the cases in which
 	GCC defaults to using the shared libgcc.
 	
 2001-02-02  Alexandre Oliva  <aoliva@redhat.com>

gcc/cppinit.c

@@ -643,6 +643,7 @@ struct builtin
 #define OPERATOR  	0x10
 
 #define B(n, t)       { U n, 0, t, 0, BUILTIN, sizeof n - 1 }
+#define BC(n, t)      { U n, 0, t, 0, BUILTIN | CPLUS, sizeof n - 1 }
 #define C(n, v)       { U n, v, 0, 0, 0, sizeof n - 1 }
 #define X(n, f)       { U n, 0, 0, 0, f, sizeof n - 1 }
 #define O(n, c, f)    { U n, 0, 0, c, OPERATOR | f, sizeof n - 1 }
@@ -655,6 +656,7 @@ static const struct builtin builtin_array[] =
   B("__LINE__",		 BT_SPECLINE),
   B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
   B("__STDC__",		 BT_STDC),
+  BC("__GXX_WEAK__",     BT_WEAK),
 
   X("__VERSION__",		VERS),
   X("__USER_LABEL_PREFIX__",	ULP),

gcc/cpplib.h

@@ -462,7 +462,9 @@ enum builtin_type
   BT_BASE_FILE,			/* `__BASE_FILE__' */
   BT_INCLUDE_LEVEL,		/* `__INCLUDE_LEVEL__' */
   BT_TIME,			/* `__TIME__' */
-  BT_STDC			/* `__STDC__' */
+  BT_STDC,			/* `__STDC__' */
+  BT_WEAK                       /* Whether or not G++ supports weak 
+				   symbols.  */
 };
 
 /* There is a slot in the hashnode for use by front ends when integrated

gcc/cppmacro.c

@@ -216,6 +216,10 @@ builtin_macro (pfile, token)
       *token = node->value.builtin == BT_DATE ? pfile->date: pfile->time;
       break;
 
+    case BT_WEAK:
+      make_number_token (pfile, token, SUPPORTS_ONE_ONLY);
+      break;
+
     default:
       cpp_ice (pfile, "invalid builtin macro \"%s\"", node->name);
       break;

gcc/defaults.h

@@ -149,6 +149,15 @@ do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
 #endif
 #endif
 
+/* This determines whether or not we support link-once semantics.  */
+#ifndef SUPPORTS_ONE_ONLY
+#ifdef MAKE_DECL_ONE_ONLY
+#define SUPPORTS_ONE_ONLY 1
+#else
+#define SUPPORTS_ONE_ONLY 0
+#endif
+#endif
+
 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
    provide a weak attribute.  Else define it to nothing. 
 

gcc/varasm.c

@@ -4828,15 +4828,6 @@ assemble_alias (decl, target)
 #endif
 }
 
-/* This determines whether or not we support link-once semantics.  */
-#ifndef SUPPORTS_ONE_ONLY
-#ifdef MAKE_DECL_ONE_ONLY
-#define SUPPORTS_ONE_ONLY 1
-#else
-#define SUPPORTS_ONE_ONLY 0
-#endif
-#endif
-
 /* Returns 1 if the target configuration supports defining public symbols
    so that one of them will be chosen at link time instead of generating a
    multiply-defined symbol error, whether through the use of weak symbols or