m4 1.4.18_2.darwin_19.x86_64: build errors in ftello.c on MacOS 10.15 Catalina

[dfaulkner (Don Faulkner)]

Fresh install of MacPorts on MacOS 10.15 (Catalina) beta (19A573a).

Attempting to build m4 as a dependency of other things (nmap), but got an error during the build. Attempted to rebuild m4 with port install m4, but got the same error. I'm attaching the full main.log, but here are the relevant lines:

:info:build ftello.c:53:12: error: no member named '_flag' in 'struct __sFILE'; did you mean '_flags'?
:info:build   if (fp_->_flag & _IOWRT)
:info:build            ^~~~~
:info:build            _flags
:info:build /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/_stdio.h:130:8: note: '_flags' declared here
:info:build         short   _flags;         /* flags, below; this FILE is free if 0 */
:info:build                 ^
:info:build ftello.c:53:20: error: use of undeclared identifier '_IOWRT'
:info:build   if (fp_->_flag & _IOWRT)
:info:build                    ^
:info:build ftello.c:64:21: error: no member named '_flag' in 'struct __sFILE'; did you mean '_flags'?
:info:build           if ((fp_->_flag & _IONBF) == 0 && fp_->_base != NULL)
:info:build                     ^~~~~
:info:build                     _flags
:info:build /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/_stdio.h:130:8: note: '_flags' declared here
:info:build         short   _flags;         /* flags, below; this FILE is free if 0 */
:info:build                 ^
:info:build ftello.c:64:50: error: no member named '_base' in 'struct __sFILE'
:info:build           if ((fp_->_flag & _IONBF) == 0 && fp_->_base != NULL)
:info:build                                             ~~~  ^
:info:build ftello.c:65:25: error: no member named '_ptr' in 'struct __sFILE'
:info:build             pos += fp_->_ptr - fp_->_base;
:info:build                    ~~~  ^
:info:build ftello.c:65:37: error: no member named '_base' in 'struct __sFILE'
:info:build             pos += fp_->_ptr - fp_->_base;
:info:build                                ~~~  ^

[dfaulkner (Don Faulkner)]

build log for m4

[jmroot (Joshua Root)]

You're still running the beta? Please confirm that this issue is still present with the final release of Catalina.

[dlamija (Muhammed Ramiza)]

success build my nmap and m4; ... try using single cpu. add

buildmakejobs           1

inside /opt/local/etc/macport/macport.conf

[cjones051073 (Chris Jones)]

Number of build jobs is irrelevant. Issue was fixed in the release versions of xcode 11 and mac os 10.15.