c-pragma.c (maybe_apply_renaming_pragma): New.

        * c-pragma.c (maybe_apply_renaming_pragma): New.
        (handle_pragma_redefine_extname, pending_redefine_extname): New.
        (handle_pragma_extern_prefix, pragma_extern_prefix): New.
        (init_pragma): Register them.
        * c-pragma.h (maybe_apply_renaming_pragma): Declare.
        * c-decl.c (finish_decl): Call it.
        * cp/decl.c (cp_finish_decl): Likewise.
        * doc/extend.texi: Document the new pragmas.

        * config/alpha/osf.h (CPP_SUBTARGET_SPEC): Add __EXTERN_PREFIX.
        (HANDLE_PRAGMA_EXTERN_PREFIX): New.

        * config/i386/sol2.h (CPP_PREDEFINES): Add __PRAGMA_REDEFINE_EXTNAME.
        (HANDLE_PRAGMA_REDEFINE_EXTNAME): New.
        * config/sparc/sol2.h: Likewise.

        * g++.dg/other/pragma-re-1.C: New.
        * g++.dg/other/pragma-ep-1.C: New.
        * gcc.dg/pragma-re-1.c, gcc.dg/pragma-re-2.c: New.
        * gcc.dg/pragma-ep-1.c, gcc.dg/pragma-ep-2.c: New.
        * gcc.dg/pragma-ep-3.c: New.

From-SVN: r51200

1 files changed, 40 insertions, 0 deletions

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 59297d2..f1f499d 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -5998,6 +5998,8 @@ for further explanation.
 @menu
 * ARM Pragmas::
 * Darwin Pragmas::
+* Solaris Pragmas::
+* Tru64 Pragmas::
 @end menu
 
 @node ARM Pragmas
@@ -6062,6 +6064,44 @@ that of the @code{unused} attribute, except that this pragma may appear
 anywhere within the variables' scopes.
 @end table
 
+@node Solaris Pragmas
+@subsection Solaris Pragmas
+
+For compatibility with the SunPRO compiler, the following pragma
+is supported.
+
+@table @code
+@item redefine_extname @var{oldname} @var{newname}
+@cindex pragma, redefine_extname
+
+This pragma gives the C function @var{oldname} the assembler label
+@var{newname}.  The pragma must appear before the function declaration.
+This pragma is equivalent to the asm labels extension (@pxref{Asm
+Labels}).  The preprocessor defines @code{__PRAGMA_REDEFINE_EXTNAME}
+if the pragma is available.
+@end table
+
+@node Tru64 Pragmas
+@subsection Tru64 Pragmas
+
+For compatibility with the Compaq C compiler, the following pragma
+is supported.
+
+@table @code
+@item extern_prefix @var{string}
+@cindex pragma, extern_prefix
+
+This pragma renames all subsequent function and variable declarations
+such that @var{string} is prepended to the name.  This effect may be
+terminated by using another @code{extern_prefix} pragma with the 
+empty string.
+
+This pragma is similar in intent to to the asm labels extension
+(@pxref{Asm Labels}) in that the system programmer wants to change
+the assembly-level ABI without changing the source-level API.  The
+preprocessor defines @code{__EXTERN_PREFIX} if the pragma is available.
+@end table
+
 @node Unnamed Fields
 @section Unnamed struct/union fields within structs/unions.
 @cindex struct