[MacPorts] #59785: llvm ports opportunistically build ocaml binding even when +ocaml variant is not selected; leads to conflicts between them

[MacPorts]

#59785: llvm ports opportunistically build ocaml binding even when +ocaml variant
is not selected; leads to conflicts between them
--------------------------------+----------------------
  Reporter:  cooljeanius        |      Owner:  jeremyhu
      Type:  defect             |     Status:  assigned
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.6.2
Resolution:                     |   Keywords:
      Port:  llvm-7.0 llvm-9.0  |
--------------------------------+----------------------

Comment (by cooljeanius):

 Note that the opportunistic building of ocaml bindings affects other llvm-
 based ports, too, such as ispc-clang, as shown in this error:
 {{{
 -- Installing:
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ispc
 /ispc-clang/work/destroot/opt/local/libexec/ispc-clang/bin/yaml2obj
 CMake Error at docs/cmake_install.cmake:41 (file):
   file INSTALL cannot find
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ispc
 /ispc-clang/work/build/docs/ocamldoc/html/.":
   No such file or directory.
 Call Stack (most recent call first):
   cmake_install.cmake:75 (include)


 make: *** [install/fast] Error 1
 make: Leaving directory
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ispc
 /ispc-clang/work/build'
 Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ispc
 /ispc-clang/work/build" && /usr/bin/make -w install/fast
 DESTDIR=/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ispc
 /ispc-clang/work/destroot
 Exit code: 2
 Error: Failed to destroot ispc-clang: command execution failed
 DEBUG: Error code: CHILDSTATUS 8436 2
 DEBUG: Backtrace: command execution failed
     while executing
 "system {*}$notty {*}$callback {*}$nice $fullcmdstring"
     invoked from within
 "command_exec -callback portprogress::target_progress_callback destroot"
     (procedure "portdestroot::destroot_main" line 2)
     invoked from within
 "$procedure $targetname"
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ispc
 /ispc-clang/main.log for details.
 }}}
 Manually creating the directory in question allows the build to proceed.

-- 
Ticket URL: <https://trac.macports.org/ticket/59785#comment:11>
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