[MacPorts] #63678: mdbtools port fails to build on macOS Catalina

[MacPorts]

#63678: mdbtools port fails to build on macOS Catalina
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  Reporter:  greeneg   |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  mdbtools  |
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Comment (by ryandesign):

 I have disabled the port's silent rules so that we can see the real
 compile commands.

 The compilation of file.c looks like:

 {{{
 /usr/bin/clang [...] -I. -I/opt/local/include -I../../include [...] -c
 file.c [...]
 }}}

 In other words, a system include path `-I/opt/local/include` is
 erroneously appearing before a local include path `-I../../include`.
 ../../include is where mdbtools.h is located which contains the prototype
 for `mdb_set_repid_fmt`, but if a user already has mbdtools instaled with
 MacPorts then the copy of mdbtools.h in /opt/local/include will be found
 first. According to the NEWS file, `mdb_set_repid_fmt` was newly added in
 version 1.0.0. Therefore any user upgrading from a previous version to
 1.0.0 will encounter this error. The fix is for the developers of mbdtools
 to ensure that the include flags for local directories always precede any
 system directories. This bug should be reported to the developers of the
 software. A workaround until the developers fix it could be to replace
 `-I$(prefix}/include` with `-isystem${prefix}/include` in
 `configure.cppflags` since `-isystem` paths are checked after all `-I`
 paths.

-- 
Ticket URL: <https://trac.macports.org/ticket/63678#comment:4>
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