kc3-lang/gnulib/doc/posix-functions/environ.texi

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• Hash : 09ef7461
  Author :
  Date : 2008-12-14T14:38:13
  

  Refer to new POSIX:2008 standard.
  

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• doc/posix-functions/environ.texi

• @node environ
  @section @code{environ}
  @findex environ
  
  POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/environ.html}
  
  Gnulib module: environ
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  POSIX does not require this variable to be declared, and it is indeed not
  declared on some platforms:
  MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, IRIX 6.5, Solaris 10.
  @item
  On MacOS X 10, this variable is not declared.  Up to MacOS X 10.4, one can use
  @smallexample
  extern char **environ;
  @end smallexample
  to get the variable declared.  This does not work any more, however, in
  shared libraries on MacOS X 10.5.  Here is a workaround: Instead, one can use
  @smallexample
  #include <crt_externs.h>
  #define environ (*_NSGetEnviron())
  @end smallexample
  This works at all versions of MacOS X.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  The address of this variable is not a compile-time constant on some platforms:
  mingw.
  @end itemize
  

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