diff options
Diffstat (limited to 'gnulib/doc/posix-functions/environ.texi')
| m--------- | gnulib | 0 | ||||
| -rw-r--r-- | gnulib/doc/posix-functions/environ.texi | 34 |
2 files changed, 34 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/doc/posix-functions/environ.texi b/gnulib/doc/posix-functions/environ.texi new file mode 100644 index 0000000..64eddf6 --- /dev/null +++ b/gnulib/doc/posix-functions/environ.texi @@ -0,0 +1,34 @@ +@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 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, IRIX 6.5, Solaris 11 2010-11. +@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 |