[MacPorts] #46106: HexFiend @2.3.0_1: error: unknown type name '__uint128_t'

[MacPorts]

#46106: HexFiend @2.3.0_1: error: unknown type name '__uint128_t'
---------------------------+--------------------
  Reporter:  ryandesign@…  |      Owner:  cal@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.3.99
Resolution:                |   Keywords:
      Port:  HexFiend      |
---------------------------+--------------------

Comment (by cal@…):

 My system clang on 10.10 supports `__uint128_t`, does yours not? Can you
 try
 {{{
 /usr/bin/clang -x c -std=c99 -pedantic -Wall -Werror -o /dev/null - <<EOF
 #include <stdint.h>
 #include <stdio.h>

 int main() {
         __uint128_t d = 21 * 2;
         printf("%d\n", (int)(d));
 }
 EOF
 }}}
 and the same with `xcrun clang` instead of `/usr/bin/clang`?

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Ticket URL: <https://trac.macports.org/ticket/46106#comment:1>
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