Conditional Clause of add_custom_command

Question

I want to take advantage of Ninja\'s \"job pools\" in my custom commands; something finally directly supported in cmake 3.15.0. Many/most people won\'t have this version, so I

Answer 1

According to @Tsyvarev, my approach is reasonable. In my code, which "works", I implemented something similar to this:

set(USE_JOB_POOL 0)
if("${CMAKE_GENERATOR}" STREQUAL "Ninja" AND
   "${CMAKE_VERSION}" STRGREATER_EQUAL "3.15.0")
    set(USE_JOB_POOL  JOB_POOL my_job_pool)
endif()
...
add_custom_command(
  OUTPUT  foo
  COMMAND  ${CMAKE_COMMAND} -E touch foo
  $<${JOB_POOL}:${JOB_POOL}>
  VERBATIM
  )