[MacPorts] #58142: cmake @3.12.3_0+universal configure failure with Xcode 10 on 10.13 (was: cmake: Alert panel appears saying I need to install Java (which I have done), then fails)

[MacPorts]

#58142: cmake @3.12.3_0+universal configure failure with Xcode 10 on 10.13
------------------------+-----------------------
  Reporter:  nikgervae  |      Owner:  michaelld
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.5.4
Resolution:             |   Keywords:
      Port:  cmake      |
------------------------+-----------------------

Comment (by jmroot):

 {{{
 :info:configure -- Check for working C compiler:
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
 -- broken
 :info:configure CMake Error at Modules/CMakeTestCCompiler.cmake:52
 (message):
 :info:configure   The C compiler
 :info:configure
 "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
 :info:configure   is not able to compile a simple test program.
 :info:configure   It fails with the following output:
 :info:configure     Change Dir:
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_cmake/cmake/work/cmake-3.12.3-i386/CMakeFiles/CMakeTmp
 :info:configure
 :info:configure     Run Build Command:"/usr/bin/make" "cmTC_ba13e/fast"
 :info:configure     make -f CMakeFiles/cmTC_ba13e.dir/build.make
 CMakeFiles/cmTC_ba13e.dir/build
 :info:configure     Building C object
 CMakeFiles/cmTC_ba13e.dir/testCCompiler.c.o
 :info:configure
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
 -pipe -Os -arch i386  -isysroot
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
 -mmacosx-version-min=10.13   -o
 CMakeFiles/cmTC_ba13e.dir/testCCompiler.c.o   -c
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_cmake/cmake/work/cmake-3.12.3-i386/CMakeFiles/CMakeTmp/testCCompiler.c
 :info:configure     Linking C executable cmTC_ba13e
 :info:configure
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_cmake/cmake/work/cmake-3.12.3-i386/Bootstrap.cmk/cmake
 -E cmake_link_script CMakeFiles/cmTC_ba13e.dir/link.txt --verbose=1
 :info:configure
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
 -pipe -Os -arch i386  -isysroot
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
 -mmacosx-version-min=10.13 -Wl,-search_paths_first
 -Wl,-headerpad_max_install_names -L/opt/local/lib
 -Wl,-headerpad_max_install_names -arch i386
 CMakeFiles/cmTC_ba13e.dir/testCCompiler.c.o  -o cmTC_ba13e
 :info:configure     ld: warning: The i386 architecture is deprecated for
 macOS (remove from the Xcode build setting: ARCHS)
 :info:configure     ld: warning: ignoring file
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd,
 missing required architecture i386 in file
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
 :info:configure     ld: dynamic main executables must link with
 libSystem.dylib for architecture i386
 :info:configure     clang: error: linker command failed with exit code 1
 (use -v to see invocation)
 :info:configure     make[1]: *** [cmTC_ba13e] Error 1
 :info:configure     make: *** [cmTC_ba13e/fast] Error 2
 }}}
 Apparently one of cmake's configure checks is deciding to use the 10.14
 SDK, even though you're on 10.13 and building for i386, which the 10.14
 SDK doesn't support.

-- 
Ticket URL: <https://trac.macports.org/ticket/58142#comment:4>
MacPorts <https://www.macports.org/>
Ports system for macOS