[MacPorts] #70871: mkvtoolnix-legacy @81.0: fatal error: no template named '_mp_size'

[MacPorts]

#70871: mkvtoolnix-legacy @81.0: fatal error: no template named '_mp_size'
--------------------------+-------------------------------
 Reporter:  sambthompson  |      Owner:  i0ntempest
     Type:  defect        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.10.1
 Keywords:  mojave        |       Port:  mkvtoolnix-legacy
--------------------------+-------------------------------
 mkvtoolnix-legacy @ 81.0_1 fails to build on MacOS Mojave 10.14.6:

 https://build.macports.org/builders/ports-10.14_x86_64-builder/builds/215343/steps
 /install-port/logs/stdio

 {{{
 In file included from src/common/common.h:47:
 /opt/local/libexec/boost/1.81/include/boost/multiprecision/gmp.hpp:382:11:
 fatal error: no template named '_mp_size'; did you mean 'mp11::mp_size'?
 }}}

 Appears to relate to this clang parsing bug:
 https://bugs.llvm.org/show_bug.cgi?id=43266 from 2019, which is present in
 clang 11, supplied with Xcode 11.3.1. It was reported against clang 8.0
 but it's not clear from the clang report which other versions are
 affected; the Xcode 11.3.1 clang is from about the same time in 2019.

 Anyway, overriding compiler with `configure.compiler=macports-clang-17`
 allows successful build. In the portfile, compliler blacklist already
 includes `clang < 1001`. Maybe needs to be bumped to `1101`, but I haven't
 tested all other clang versions.

-- 
Ticket URL: <https://trac.macports.org/ticket/70871>
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