[PATCH] strdupa, strndupa

[Yaakov (Cygwin/X)]

The attached patch adds strdupa(3) and strndupa(3):

http://www.kernel.org/doc/man-pages/online/pages/man3/strdup.3.html

These functions must be macros, as they use alloca(3) (or more
precisely, __builtin_alloca, as they are only available with GCC).
The code is adapted from our own strdup code.


Yaakov
Cygwin/X
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