How to check whether a target has been added or not?

Question

Assume I have a cmake macro that adds target (library or executable) based on some conditions

macro (conditionally_add target_name target_src condition)
  if (co         


        

Answer 1

It seems, there is still no way to iterate over targets in the CMake, so you'd need to do it yourself.

You'll need to create a custom variant of add_executable() and add_library() functions, which would do something like

function(my_add_executable TARGET)
  list(APPEND MY_TARGETS ${TARGET})
  add_executable(${TARGET} ${ARGN}
endfunction()function(my_add_executable TARGET)

Answer 2

Use the TARGET clause of the if command:

conditionally_add (mylib mysrc.cc ${some_condition})
if (TARGET mylib)
  # Do something when target found
endif()