[MacPorts] #61349: ccache 4.0: error: use of undeclared identifier 'CLONE_NOOWNERCOPY'

[MacPorts]

#61349: ccache 4.0: error: use of undeclared identifier 'CLONE_NOOWNERCOPY'
--------------------------+------------------------
 Reporter:  chrstphrchvz  |      Owner:  ryandesign
     Type:  defect        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.6.3
 Keywords:                |       Port:  ccache
--------------------------+------------------------
 [https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/129053/steps
 /install-port/logs/stdio Build fails on macOS 10.12]. During
 configuration, sys/clonefile.h is detected:
 {{{
 -- Looking for sys/clonefile.h
 -- Looking for sys/clonefile.h - found
 }}}

 …but fails to compile:
 {{{
 [ 60%] Building CXX object src/CMakeFiles/ccache_lib.dir/cleanup.cpp.o
 cd
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_ccache/ccache/work/build/src
 && /usr/bin/clang++ -DUSE_XXH_DISPATCH -DXXH_STATIC_LINKING_ONLY
 -I/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_ccache/ccache/work/build
 -I/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_ccache/ccache/work/ccache-4.0/src/.
 -isystem /opt/local/include -pipe -Os -DNDEBUG -I/opt/local/include
 -stdlib=libc++ -arch x86_64 -mmacosx-version-min=10.12 -Wdouble-promotion
 -std=c++11 -o CMakeFiles/ccache_lib.dir/cleanup.cpp.o -c
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_ccache/ccache/work/ccache-4.0/src/cleanup.cpp
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_ccache/ccache/work/ccache-4.0/src/Util.cpp:259:44:
 error: use of undeclared identifier 'CLONE_NOOWNERCOPY'
   if (clonefile(src.c_str(), dest.c_str(), CLONE_NOOWNERCOPY) != 0) {
                                            ^
 }}}

 `CLONE_NOOWNERCOPY` was introduced in macOS 10.13; not sure if it can be
 used at all on 10.12, or if ccache should instead pretend sys/clonefile.h
 isn't available on 10.12 and use its fallback implementation in this case.

 This is separate from the issue in #61347, since sys/clonefile.h is
 correctly not detected on macOS 10.11 and earlier.

-- 
Ticket URL: <https://trac.macports.org/ticket/61349>
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Ports system for macOS