[MacPorts] #57196: libgcc7 fails to compile/install on macOS Mojave

[MacPorts]

#57196: libgcc7 fails to compile/install on macOS Mojave
------------------------------+--------------------
  Reporter:  ProgrammingPoet  |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.5.3
Resolution:                   |   Keywords:  mojave
      Port:  libgcc7          |
------------------------------+--------------------
Changes (by ryandesign):

 * keywords:  libgcc7 install fail => mojave
 * cc: sean@… (removed)
 * port:  libgcc7, py27-matplotlib => libgcc7


Comment:

 Your log says:

 {{{
 fatal error: experimental/bits/lfts_config.h: No such file or directory
  #include <experimental/bits/lfts_config.h>
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 compilation terminated.
 }}}

 This looks like the parallel build failure we previously encountered on
 APFS on High Sierra. [https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
 The upstream bug report] has recently had a comment that the issue has
 resurfaced on Mojave, even with the existing solutions in place. The
 workaround is to build non-parallel:

 {{{
 sudo port install libgcc7 build.jobs=1
 }}}

 If other gcc ports fail in the same way, use the same workaround.

-- 
Ticket URL: <https://trac.macports.org/ticket/57196#comment:1>
MacPorts <https://www.macports.org/>
Ports system for macOS