[MacPorts] #59133: libgcc9 fails to build with Mojave and Xcode 11 latestrelease

[MacPorts]

#59133: libgcc9 fails to build with Mojave and Xcode 11 latestrelease
-----------------------+--------------------
  Reporter:  vdoublie  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.6.0
Resolution:            |   Keywords:
      Port:  libgcc9   |
-----------------------+--------------------

Comment (by rex4539):

 I followed the various remedies above but still no joy in Catalina.

 ```
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/build/./gcc/xgcc
 -B/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/build/./gcc/
 -B/opt/local/x86_64-apple-darwin19/bin/ -B/opt/local/x86_64-apple-
 darwin19/lib/ -isystem /opt/local/x86_64-apple-darwin19/include -isystem
 /opt/local/x86_64-apple-darwin19/sys-include   -fno-checking -g -O2 -pipe
 -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -O2
 -g -O2 -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -DIN_GCC
 -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format -Wstrict-
 prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include
 -mmacosx-version-min=10.5 -pipe -fno-common -g -DIN_LIBGCC2 -fbuilding-
 libgcc -fno-stack-protector   -mmacosx-version-min=10.5 -pipe -fno-common
 -I. -I. -I../.././gcc
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/gcc-9.2.0/libgcc
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/gcc-9.2.0/libgcc/.
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/gcc-9.2.0/libgcc/../gcc
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/gcc-9.2.0/libgcc/../include
 -o _bswapdi2_s.o -MT _bswapdi2_s.o -MD -MP -MF _bswapdi2_s.dep -DSHARED
 -DL_bswapdi2 -c
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/gcc-9.2.0/libgcc/libgcc2.c
 :info:build during RTL pass: expand
 :info:build In file included from ÿÄL‰ïè)£:56:
 :info:build ÿÄL‰ïè)£: In function '__mulxc3':
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/work/gcc-9.2.0/libgcc/libgcc2.h:256:16:
 internal compiler error: Segmentation fault: 11
 ```

-- 
Ticket URL: <https://trac.macports.org/ticket/59133#comment:22>
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