add_dependencies for dependencies that have non-zero exit code

Question

I am doing this:

    add_custom_target(Target1
        COMMAND Command1
    )
    add_custom_target(Target2
        COMMAND Command2
    )
    add_dependencies(Target2 Target1)

but if Command1 has a non-zero exit code, Command2 is never run. Is there a way to make sure that Target2 runs after Target1, but no matter what the exit code of Command1 is?

you can always execute some simple statement at the end of the command so it would reuturn 0 exit code(like echo, for example) — ixSci, Feb 04 '16 at 15:04
@DavideSpataro I just want a sequential ordering (Target1 must be run before Target2) - I don't want Target2 to depend on Target1 succeeding. — David Doria, Feb 04 '16 at 15:05
@ixSci But the add_custom_target ends immediately as soon as one of the COMMANDs returns non-zero, right? So the second COMMAND of 'echo' would never be reached. — David Doria, Feb 04 '16 at 15:05
I mean do it as part of the first command you can do a few command as one by piping them. So it should not see any return value untill all the commands are complete — ixSci, Feb 04 '16 at 15:14
Or you can put the commands, with echo as the last one, in some script file and invoke it in the COMMAND — ixSci, Feb 04 '16 at 15:16
@ixSci I tried this: ` add_custom_target(Target1 COMMAND ctest | echo "echoing" )` but it just echos and does not run 'ctest'. — David Doria, Feb 04 '16 at 15:21
hm, what about `add_custom_target(Target1 COMMAND ctest COMMAND echo "echoing" )`, won't help? — ixSci, Feb 04 '16 at 15:24
@ixSci Nope, the first COMMAND fails and the second is never run. — David Doria, Feb 04 '16 at 15:27
The solution here looks reasonable: http://stackoverflow.com/questions/15322547/catch-return-value-in-cmake-add-custom-command — RjOllos, Feb 04 '16 at 19:30

score 0 · Answer 1 · answered Feb 04 '16 at 19:32

I ended up with this:

    file(WRITE ${CMAKE_BINARY_DIR}/NoExitCodeTests.cmake "execute_process(COMMAND ctest)")

    add_custom_target(Target1
        COMMAND ${CMAKE_COMMAND} -P NoExitCodeTests.cmake
    )

This will make Target1 always return 0 no matter what happens in ctest. Ugly, but sometimes CMake is ugly :)

add_dependencies for dependencies that have non-zero exit code

1 Answers1