[Chicken-hackers] [PATCH] Add strings.h header to runtime.c

[Peter Bex]

Hello all,

While working on the header & feature macro portability issues that
have been plagueing us these past few days, I also noticed a warning
on MingW regarding an implicit declaration of strcasecmp.

See also https://sourceforge.net/p/mingw/bugs/1447/

According to this, strcasecmp and strncasecmp are supposed to be
declared in <strings.h> (a POSIX C header).  Most systems will in
practice include that header from <string.h> (which is an ISO C header),
but not MingW.  At least, not anymore.

Attached is a trivial fix (works on both branches).  I decided not to
simply push it, because it may be a trivial fix, but who knows on what
platforms it may break...  Theoretically at least, all our supported
platforms implement POSIX, so they should all support this header.

Cheers,
Peter

0001-Add-strings.h-for-strn-case-cmp.patch
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