[MacPorts] #68154: opensc @0.23.0: error: implicit declaration of function 'strnlen' is invalid in C99

[MacPorts]

#68154: opensc @0.23.0: error: implicit declaration of function 'strnlen' is
invalid in C99
-------------------------+-------------------------
  Reporter:  ryandesign  |      Owner:  mascguy
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:  fixed       |   Keywords:  snowleopard
      Port:  opensc      |
-------------------------+-------------------------

Comment (by jmroot):

 It doesn't look like this is actually fixed:
 https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/171680/steps
 /install-port/logs/stdio
 {{{
 openpgp-tool-helpers.c:200:24: warning: implicit declaration of function
 'strnlen' is invalid in C99 [-Wimplicit-function-declaration]
                 size_t used_length = strnlen(src, length) >> 1;
                                      ^
 }}}
 This file needs to `#include "common/compat_strnlen.h"`.

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Ticket URL: <https://trac.macports.org/ticket/68154#comment:4>
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