Supported GCC pragmas

The following GCC pragmas are supported in IBM® XL C/C++ for Linux, V13.1.1. For details about these pragmas, see the GNU Compiler Collection online documentation at http://gcc.gnu.org/onlinedocs/.

• #pragma GCC dependency
• #pragma GCC diagnostic kind option
• #pragma GCC diagnostic pop
• #pragma GCC diagnostic push
• #pragma GCC error string
• #pragma GCC poison
• #pragma GCC system_header
• #pragma GCC visibility push(visibility)
• #pragma GCC visibility pop
• #pragma GCC warning string
• #pragma message string
• #pragma once
• #pragma pop_macro("macro_name")
• #pragma push_macro("macro_name")
• #pragma redefine_extname oldname newname
• #pragma unused