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CMake custom build step PRE_LINK / PRE_BUILD not working

PRE_LINK and PRE_BUILD don't seem to work in CMake on linux (generating MakeFiles). The documentation says that only PRE_BUILD is not supported. But PRE_LINK doesn't work at all.

I was not sure if they misunderstood them or if something was missing.

(Currently, as a workaround, I added a fake target and POST_BUILD to it, and then created a dependency. But it has its own problems. For my setup, there are problems when doing parallel make (-j).

Code example:

cmake_minimum_required(VERSION 2.8.5)
project(custom_command_test)

add_custom_target(my_actual_target
    COMMAND echo " I am the actual taget "
    COMMENT "Running actual target"
    )
add_custom_command(
    TARGET my_actual_target
    PRE_LINK
    COMMAND echo "I am prelinked to actual target"
    COMMENT " Running PRELINK action "
    )
add_custom_command(
    TARGET my_actual_target
    PRE_BUILD
    COMMAND echo " I am prebuilt to actual target"
    COMMENT " Running PRE_BUILD action"
    )
add_custom_command(
    TARGET my_actual_target
    POST_BUILD
    COMMAND echo " I postbuild to actual target"
    COMMENT " Running POST BUILD action "
    )

Output:

> cmake .
-- The C compiler identification is GNU 4.4.2
-- The CXX compiler identification is GNU 4.4.2
-- Check for working C compiler: XXXX/gcc/4.4.2/bin/gcc
-- Check for working C compiler: XXXX/gcc/4.4.2/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: XXXX/gcc/4.4.2/bin/g++
-- Check for working CXX compiler: XXXX/gcc/4.4.2/bin/g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: XXXX

 > make my_actual_target
Scanning dependencies of target my_actual_target
[100%] Running actual target
 I am the actual taget 
 Running PRE_BUILD action
 I am prebuilt to actual target
 Running POST BUILD action 
 I postbuild to actual target
[100%] Built target my_actual_target

> cmake --version
cmake version 2.8.10.2

Any solution?

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1 answer

It seems to PRE_LINKwork only for "real" purposes, such as a library or executable:

add_library(my_actual_target foo.cpp)

add_custom_command(
    TARGET my_actual_target
    PRE_LINK
    COMMAND echo "I am prelinked to actual target"
    COMMENT " Running PRE_LINK action "
    )
add_custom_command(
    TARGET my_actual_target
    PRE_BUILD
    COMMAND echo " I am prebuilt to actual target"
    COMMENT " Running PRE_BUILD action"
    )
add_custom_command(
    TARGET my_actual_target
    POST_BUILD
    COMMAND echo " I postbuild to actual target"
    COMMENT " Running POST_BUILD action "
    )

Result:

Running PRE_BUILD action
...
Running PRE_LINK action
...
Running POST_BUILD action

IMHO this is a problem with the documentation

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