...and things had gone so nicely on Snow Leopard for awhile now, until this:
:notice:build ---> Building gtk3 :debug:build Executing org.macports.build (gtk3) :info:build ---> Building gtk3 for architecture x86_64 :debug:build setting option build.dir to /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_gnome_gtk3/gtk3/work/build-x86_64 :debug:build Environment: :debug:build CC_PRINT_OPTIONS='YES' :debug:build CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_gnome_gtk3/gtk3/work/.CC_PRINT_OPTIONS' :debug:build CPATH='/opt/local/include' :debug:build CPLUS_INCLUDE_PATH='/opt/local/include/LegacySupport' :debug:build C_INCLUDE_PATH='/opt/local/include/LegacySupport' :debug:build DEVELOPER_DIR='/Developer' :debug:build LIBRARY_PATH='/opt/local/lib' :debug:build MACOSX_DEPLOYMENT_TARGET='10.6' :debug:build MACPORTS_LEGACY_SUPPORT_CPPFLAGS='-isystem/opt/local/include/LegacySupport' :debug:build MACPORTS_LEGACY_SUPPORT_ENABLED='1' :debug:build MACPORTS_LEGACY_SUPPORT_LDFLAGS='-L/opt/local/lib -lMacportsLegacySupport' :debug:build OBJCPLUS_INCLUDE_PATH='/opt/local/include/LegacySupport' :debug:build OBJC_INCLUDE_PATH='/opt/local/include/LegacySupport' :info:build 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 -j4 CC='/opt/local/bin/clang-mp-8.0 -arch x86_64' CC_FOR_BUILD='/opt/local/bin/clang-mp-8.0 -arch x86_64' -v :debug:build system: 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 -j4 CC='/opt/local/bin/clang-mp-8.0 -arch x86_64' CC_FOR_BUILD='/opt/local/bin/clang-mp-8.0 -arch x86_64' -v :info:build ninja: error: unknown target 'CC=/opt/local/bin/clang-mp-8.0 -arch x86_64' :info:build 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 -j4 CC='/opt/local/bin/clang-mp-8.0 -arch x86_64' CC_FOR_BUILD='/opt/local/bin/clang-mp-8.0 -arch x86_64' -v :info:build Exit code: 1 :error:build Failed to build gtk3: command execution failed :debug:build Error code: NONE :debug:build Backtrace: command execution failed :debug:build while executing :debug:build "$procedure $targetname" :error:build See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_gnome_gtk3/gtk3/main.log for details. Lest anyone wonder, /opt/local/bin/clang-mp-8.0 does exist.