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35 lines
974 B
Plaintext
35 lines
974 B
Plaintext
@node environ
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@section @code{environ}
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@findex environ
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POSIX specification: @url{http://www.opengroup.org/susv3xsh/environ.html}
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Gnulib module: environ
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Portability problems fixed by Gnulib:
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@itemize
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@item
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POSIX does not require this variable to be declared, and it is indeed not
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declared on some platforms:
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MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, IRIX 6.5, Solaris 10.
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@item
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On MacOS X 10, this variable is not declared. Up to MacOS X 10.4, one can use
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@smallexample
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extern char **environ;
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@end smallexample
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to get the variable declared. This does not work any more, however, in
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shared libraries on MacOS X 10.5. Here is a workaround: Instead, one can use
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@smallexample
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#include <crt_externs.h>
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#define environ (*_NSGetEnviron())
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@end smallexample
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This works at all versions of MacOS X.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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The address of this variable is not a compile-time constant on some platforms:
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mingw.
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@end itemize
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