Top Forums Programming Compilation error on namespaces in system header debug.h Post 302143399 by rimon on Thursday 1st of November 2007 06:41:42 AM
Compilation error on namespaces in system header debug.h

Hi,

I'm porting code from Windows to HP-UX 11, compiling with g++.
I'm getting a compilation error on the system's debug.h include file, which is included very indirectly through a series of other system include files. The one I am including is <map> .
The errors I am getting are:
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h: At global scope:
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:49: error: expected identifier before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:49: error: expected unqualified-id before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:54: error: expected identifier before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:54: error: expected unqualified-id before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:59: error: expected identifier before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:59: error: expected `;' before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:59: error: expected unqualified-id before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:60: error: expected identifier before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:60: error: expected `;' before numeric constant
/opt/hp-gcc-4.2.1/lib/gcc/ia64-hp-hpux11.23/4.2.1/../../../../include/c++/4.2.1/debug/debug.h:60: error: expected unqualified-id before numeric constant

Following is the beginning of debug.h with the leading comment removed. The lines that get the errors are the declarations of nested namespaces, e.g. namespace __debug { }

Code:
#ifndef _GLIBCXX_DEBUG_MACRO_SWITCH_H
#define _GLIBCXX_DEBUG_MACRO_SWITCH_H 1

/** Macros and namespaces used by the implementation outside of debug
 *  wrappers to verify certain properties. The __glibcxx_requires_xxx
 *  macros are merely wrappers around the __glibcxx_check_xxx wrappers
 *  when we are compiling with debug mode, but disappear when we are
 *  in release mode so that there is no checking performed in, e.g.,
 *  the standard library algorithms.
*/

// Debug mode namespaces.
namespace std
{
  namespace __debug { }
}

namespace __gnu_cxx
{
  namespace __debug { };
}

namespace __gnu_debug
{
  using namespace std::__debug;
  using namespace __gnu_cxx::__debug;
}

How do I get this to compile?

Thank you!

RO
 
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__BUILTIN_CONSTANT_P(3) 				   BSD Library Functions Manual 				   __BUILTIN_CONSTANT_P(3)

NAME
__builtin_constant_p -- GNU extension to determine compile time constants SYNOPSIS
int __builtin_constant_p(value); DESCRIPTION
The __builtin_constant_p() is a GNU extension for determining whether a value is known to be constant at compile time. The function is closely related to the concept of ``constant folding'' used by modern optimizing compilers. If the value is known to be a compile-time constant, a value 1 is returned. If __builtin_constant_p() returns 0, the value is not a compile- time constant in the sense that gcc(1) was unable to determine whether the value is constant or not. EXAMPLES
A typical example of the use of __builtin_constant_p() involves a situation where it may be desirable to fold the computation if it involves a constant, but a function call is needed otherwise. For instance, bswap16(3) is defined in NetBSD as: #define bswap16(x) (__builtin_constant_p((x)) ? __byte_swap_u16_constant(x) : __BYTE_SWAP_U16_VARIABLE(x)) SEE ALSO
gcc(1), __builtin_object_size(3), __builtin_return_address(3) CAVEATS
This is a non-standard, compiler-specific extension. BSD
December 19, 2010 BSD

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