gtk3, gtk3-devel cannot build as universal on x86: ninja: error: unknown target 'CC=/opt/local/bin/clang-mp-11 -arch x86_64'
---> Building gtk3 for architecture x86_64
Executing: cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_gnome_gtk3/gtk3/work/build-x86_64" && /opt/local/bin/ninja -j6 CC='/opt/local/bin/clang-mp-11 -arch x86_64' CC_FOR_BUILD='/opt/local/bin/clang-mp-11 -arch x86_64' -v
ninja: error: unknown target 'CC=/opt/local/bin/clang-mp-11 -arch x86_64'
Command failed: cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_gnome_gtk3/gtk3/work/build-x86_64" && /opt/local/bin/ninja -j6 CC='/opt/local/bin/clang-mp-11 -arch x86_64' CC_FOR_BUILD='/opt/local/bin/clang-mp-11 -arch x86_64' -v
Exit code: 1
Error: Failed to build gtk3: command execution failed