shapelib @1.6.1 -- Unable to build -- fatal error: 'filesystem' file not found

[RobK88]

I am unable to upgrade / build shapelib in High Sierra -- fatal error: 'filesystem' file not found

bash-3.2$ port outdated
The following installed ports are outdated:
gh                             2.53.0_0 < 2.55.0_0       
qt5-qttools                    5.15.12_0 < 5.15.15_0     
shapelib                       1.5.0_0 < 1.6.1_0         
xastir                         2.1.8_11 < 2.1.8_12       
bash-3.2$ 
bash-3.2$ 
bash-3.2$ sudo port clean shapelib
--->  Cleaning shapelib
bash-3.2$ 
bash-3.2$ sudo port -v upgrade shapelib

...

Building CXX object tests/CMakeFiles/dbf_test.dir/dbf_test.cc.o
cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/build/tests && /usr/bin/clang++  -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/shapelib-1.6.1 -isystem /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/build/_deps/googletest-src/googletest/include -isystem /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/build/_deps/googletest-src/googletest -pipe -Os -DNDEBUG -I/opt/local/include -stdlib=libc++ -std=c++17 -arch x86_64 -mmacosx-version-min=10.13 -MD -MT tests/CMakeFiles/dbf_test.dir/dbf_test.cc.o -MF CMakeFiles/dbf_test.dir/dbf_test.cc.o.d -o CMakeFiles/dbf_test.dir/dbf_test.cc.o -c /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/shapelib-1.6.1/tests/dbf_test.cc
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/shapelib-1.6.1/tests/sbn_test.cc:3:10: fatal error: 'filesystem' file not found
#include <filesystem>
         ^~~~~~~~~~~~
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/shapelib-1.6.1/tests/dbf_test.cc:4:10: fatal error: 'filesystem' file not found
#include <filesystem>
         ^~~~~~~~~~~~
1 error generated.
make[2]: *** [tests/CMakeFiles/sbn_test.dir/sbn_test.cc.o] Error 1
make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/build'
make[1]: *** [tests/CMakeFiles/sbn_test.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
1 error generated.
make[2]: *** [tests/CMakeFiles/dbf_test.dir/dbf_test.cc.o] Error 1
make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/build'
make[1]: *** [tests/CMakeFiles/dbf_test.dir/all] Error 2
make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/build'
make: *** [all] Error 2
make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/build'
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/work/build" && /usr/bin/make -j2 -w all VERBOSE=ON 
Exit code: 2
Error: Failed to build shapelib: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_shapelib/shapelib/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.

[RobK88]

main.log

[RobK88]

P.S. I also tried building using clang-11, clang-15 and clang-16. The builds all failed but with different errors.

[kencu (Ken)]

The system software installed in High Sierra by Apple is now too old to support "filesystem", and no amount of tweaking the bulid or selecting other compilers will change that.

If you use legacysupport and enable macports-libcxx in legacysupport's options for systems up to your needed system, it will often build.

It then needs to be actually tested.

Because the libc++ in macports-libcxx and the libc++ installed in High SIerra are different, and because LLVM/LIBCXX specifically provide no guarantees of compatibility between different libc++ versions, there are runtime errors that show up sometimes. If those runtime errors happen, then the macports-libcxx approach can't be used.

[nilason (Nicklas Larsson)]

​PR 26066 should fix this. It was the gtest that dragged in "filesystem".

[nilason (Nicklas Larsson)]

In 1aa4bce76b69fb195d73f4022ac3cb7b976e059f/macports-ports (master):

shapelib: disable building test

Closes: #71026