Add support for unique sections in arm-linux target.

From-SVN: r40632

gcc/ChangeLog

+2001-03-19  Philip Blundell  <philb@gnu.org>
+
+	* arm/linux-elf.h (MAKE_DECL_ONE_ONLY, UNIQUE_SECTION_P): Define.
+	(UNIQUE_SECTION): Define.
+
 2001-03-19  Mark Mitchell  <mark@codesourcery.com>
 
 	* cse.c (find_comparison_args): Update documentation.  Fix

gcc/config/arm/linux-elf.h

@@ -235,6 +235,44 @@ const_section ()							\
    go into the const section.  */
 #define SELECT_RTX_SECTION(MODE,RTX) const_section ()
 
+#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
+#define UNIQUE_SECTION_P(DECL)   (DECL_ONE_ONLY (DECL))
+
+#define UNIQUE_SECTION(DECL, RELOC)				\
+  do								\
+    {								\
+      int len;							\
+      char *name;						\
+      char *string;						\
+      char *prefix;						\
+								\
+      name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));	\
+      								\
+      if (! DECL_ONE_ONLY (DECL))				\
+	{							\
+	  prefix = ".";                                         \
+	  if (TREE_CODE (DECL) == FUNCTION_DECL)		\
+	    prefix = ".text.";					\
+	  else if (DECL_READONLY_SECTION (DECL, RELOC))		\
+	    prefix = ".rodata.";				\
+	  else							\
+	    prefix = ".data.";					\
+	}							\
+      else if (TREE_CODE (DECL) == FUNCTION_DECL)		\
+	prefix = ".gnu.linkonce.t.";				\
+      else if (DECL_READONLY_SECTION (DECL, RELOC))		\
+	prefix = ".gnu.linkonce.r.";				\
+      else							\
+	prefix = ".gnu.linkonce.d.";				\
+      								\
+      len = strlen (name) + strlen (prefix);			\
+      string = alloca (len + 1);				\
+      sprintf (string, "%s%s", prefix, name);			\
+      								\
+      DECL_SECTION_NAME (DECL) = build_string (len, string);	\
+    }								\
+  while (0)
+
 /* On svr4, we *do* have support for the .init and .fini sections, and we
    can put stuff in there to be executed before and after `main'.  We let
    crtstuff.c and other files know this by defining the following symbols.