rxvt-unicode install fails

[joerg van den hoff]

this is on OSX 10.14.6 and with current macports 2.6.2.

it does not find <sys/types.h> it seems. I don't find anything related to this in the bug tracker, 
so any hint appreciated how to proceed.

thank you,
joerg

PS:
#========================================================
tail of logfile:
...
:debug:build Executing org.macports.build (rxvt-unicode)
: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_release_tarballs_ports_x11_rxvt-unicode/rxvt-unicode/work/.CC_PRINT_OPTIONS'
:debug:build CPATH='/opt/local/include'
:debug:build DEVELOPER_DIR='/Library/Developer/CommandLineTools'
:debug:build LIBRARY_PATH='/opt/local/lib'
:debug:build MACOSX_DEPLOYMENT_TARGET='10.14'
:debug:build SDKROOT='/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk'
:info:build Executing:  cd 
"/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_rxvt-unicode/rxvt-unicode/work/rxvt-unicode-9.22" 
&& /usr/bin/make -j12 -w >
:debug:build system:  cd 
"/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_rxvt-unicode/rxvt-unicode/work/rxvt-unicode-9.22" 
&& /usr/bin/make -j12 -w al>
:info:build make: Entering directory 
`/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_rxvt-unicode/rxvt-unicode/work/rxvt-unicode-9.22'
:info:build make[1]: Entering directory 
`/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_rxvt-unicode/rxvt-unicode/work/rxvt-unicode-9.22/src'
:info:build /usr/bin/clang++ -I.. -I. -I. -I./../libev -I./../libptytty/src -DHAVE_CONFIG_H 
-I/opt/local/include -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk 
-I/opt/local/include/ossp -I/o>
:info:build In file included from ./rxvtperl.xs:25:
:info:build /opt/local/lib/perl5/5.28/darwin-thread-multi-2level/CORE/perl.h:684:10: fatal error: 
'sys/types.h' file not found
:info:build #include <sys/types.h>
:info:build          ^~~~~~~~~~~~~
:info:build 1 error generated.
:info:build make[1]: *** [rxvtperl.o] Error 1
:info:build make[1]: Leaving directory 
`/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_rxvt-unicode/rxvt-unicode/work/rxvt-unicode-9.22/src'
:info:build make: *** [all] Error 1
:info:build make: Leaving directory 
`/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_rxvt-unicode/rxvt-unicode/work/rxvt-unicode-9.22'
:info:build Command failed:  cd 
"/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_x11_rxvt-unicode/rxvt-unicode/work/rxvt-unicode-9.22" 
&& /usr/bin/make -j1>
:info:build Exit code: 2
:error:build Failed to build rxvt-unicode: command execution failed
:debug:build Error code: CHILDSTATUS 98834 2
:debug:build Backtrace: command execution failed
:debug:build     while executing
:debug:build "system {*}$notty {*}$nice $fullcmdstring"
:debug:build     invoked from within
:debug:build "command_exec build"
:debug:build     (procedure "portbuild::build_main" line 8)
:debug:build     invoked from within
:debug:build "$procedure $targetname"
#=======================================================