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[libgfortran, committed] Include <strings.h> when using strncasecmp

From: FX <fxcoudert at gmail dot com>
To: Fortran List <fortran at gcc dot gnu dot org>
Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Wed, 21 Dec 2016 10:49:48 +0100
Subject: [libgfortran, committed] Include <strings.h> when using strncasecmp
Authentication-results: sourceware.org; auth=none

The POSIX function strncasecmp() is used in three libgfortran files. It is located in <strings.h>, but these files include <string.h> (singular vs. plural). Apparently most implementations (linux, darwin, …) are lenient and allow that, but not mingw32, causing PR 70311 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70311)

The attached patch, bootstrapped and regtested on x86_64-apple-darwin16.3.0, fixes the issue by including the proper header.
Committed as revision 243843.

FX

Attachment: strings.diff
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