Pallet build fails on 10.15

[coolbikerdad]

Build fails on Catalina. Tail of error log follows:

:info:build /* com.apple.ibtool.document.warnings */
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_Pallet/Pallet/work/Pallet/Preferences.xib:global: warning: This file is set to build for a version older than the deployment target. Functionality may be limited.
:info:build /* com.apple.ibtool.document.errors */
:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_Pallet/Pallet/work/Pallet/Preferences.xib:global: error: Compiling for earlier than macOS 10.6 is no longer supported.
:info:build CpResource TB_Info.icns build/Release/Pallet.app/Contents/Resources/TB_Info.icns
:info:build     cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_Pallet/Pallet/work/Pallet
:info:build     builtin-copy -exclude .DS_Store -exclude CVS -exclude .svn -exclude .git -exclude .hg -strip-debug-symbols -strip-tool /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/strip -resolve-src-symlinks /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_Pallet/Pallet/work/Pallet/TB_Info.icns /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_Pallet/Pallet/work/Pallet/build/Release/Pallet.app/Contents/Resources
:info:build ** BUILD FAILED **
:info:build The following build commands failed:
:info:build 	CompileXIB Preferences.xib
:info:build (1 failure)
:info:build Command failed: cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_Pallet/Pallet/work/Pallet" && /usr/bin/xcodebuild -UseNewBuildSystem=NO  -target "Pallet" -configuration Release build INSTALL_PATH=/Applications/MacPorts  OBJROOT="/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_Pallet/Pallet/work/Pallet/build/" SYMROOT="/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_sysutils_Pallet/Pallet/work/Pallet/build/" MACOSX_DEPLOYMENT_TARGET=10.15 ARCHS=x86_64 SDKROOT="/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk" GCC_VERSION=com.apple.compilers.llvm.clang.1_0 CLANG_CXX_LIBRARY="libc++" FRAMEWORK_SEARCH_PATHS='/opt/local/Library/Frameworks Growl-1.2.1-Framework'
:info:build Exit code: 65
:error:build Failed to build Pallet: 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_sysutils_Pallet/Pallet/main.log for details.

[coolbikerdad]

Build log file (full)