blocxx
Environ.hpp
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32
33
34#ifndef BLOCXX_ENVIRON_HPP_INCLUDE_GUARD_
35#define BLOCXX_ENVIRON_HPP_INCLUDE_GUARD_
36
42#include "blocxx/BLOCXX_config.h"
43
44#if defined(BLOCXX_DARWIN)
45// On MacOSX, environ is not defined in shared libraries. It is only provided
46// for executables. Since the linker must resolve all symbols at link time,
47// the normal extern declaration of environ won't work. As a substitute, we
48// need to use this:
49#include <crt_externs.h>
50#define environ (*_NSGetEnviron())
51
52// For more details on the subject, follow one of these links:
53// http://lists.gnu.org/archive/html/bug-guile/2004-01/msg00013.html
54// http://lists.apple.com/archives/darwin-dev/2005/Mar/msg00132.html
55// http://www.metapkg.org/wiki/15 (under the linking problems)
56
57#else /* !DARWIN */
58// according to man environ:
59// This variable must be declared in the user program, but is
60// declared in the header file unistd.h in case the header files came from
61// libc4 or libc5, and in case they came from glibc and _GNU_SOURCE was
62// defined.
63BLOCXX_IMPORT extern char** environ;
64#endif /* DARWIN */
65
66#endif /* INCLUDE_GUARD */
BLOCXX_IMPORT char ** environ