[MacPorts] #59344: Error when compiling gcc9 with xcode11.1

[MacPorts]

#59344: Error when compiling gcc9 with xcode11.1
-----------------------------+--------------------
 Reporter:  houzeaux         |      Owner:  (none)
     Type:  defect           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:
 Keywords:  gcc9, xcode11.1  |       Port:
-----------------------------+--------------------
 1. Everything goes well with xcode11.0, but when installing gcc9 with
 xcode11.1 it fails (I followed exactly the migration procedure). I have
 the following:

 sudo xcode-select --version => xcode-select version 2370.
 xcrun --show-sdk-path =>
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk

 2. Then I tried to install gcc9

 .....

 Error: libgcc9 cannot be built while libunwind-headers is active.
 Error: Please forcibly deactivate libunwind-headers, e.g. by running:
 Error:
 Error:     sudo port -f deactivate libunwind-headers
 Error:
 Error: Then try again. You can reactivate libunwind-headers again later.
 Error: Failed to build libgcc9: libunwind-headers is active
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/main.log
 for details.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port gcc9 failed

 3. I desactivated libunwind-headers

 houzeaux:/Users/houzeaux/Desktop % sudo port -f deactivate libunwind-
 headers
 Password:
 --->  Deactivating libunwind-headers @5.0.1_0
 --->  Cleaning libunwind-headers


 4. I reinstall gcc9 and get the following message:

 sudo port install gcc9
 --->  Computing dependencies for gcc9
 The following dependencies will be installed:
  libgcc
  libgcc9
 Continue? [Y/n]: Y
 --->  Fetching archive for libgcc9
 --->  Attempting to fetch libgcc9-9.2.0_1.darwin_19.x86_64.tbz2 from
 http://lil.fr.packages.macports.org/libgcc9
 --->  Attempting to fetch libgcc9-9.2.0_1.darwin_19.x86_64.tbz2 from
 http://nue.de.packages.macports.org/libgcc9
 --->  Attempting to fetch libgcc9-9.2.0_1.darwin_19.x86_64.tbz2 from
 https://packages.macports.org/libgcc9
 --->  Building libgcc9
 Error: Failed to build libgcc9: command execution failed
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/libgcc9/main.log
 for details.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port gcc9 failed

 5. I attach the log file

-- 
Ticket URL: <https://trac.macports.org/ticket/59344>
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