CODEWITHSUNDEEP
shellmakefilecmake
Chao Zhang
Chao Zhang

Reputation: 200

CMake how to transfer shell command in CMakeLists.txt into Makefile

The problem: i want to echo some info when make makefile, the makefile is generated by CMakeLists.txt, and i don't want to echo the info when cmake CMakeLists.txt, what should i do? In Makefile, the code is like this: 

.build-pre:
    @echo
    @echo "###########################################################"
    @echo "######## Welcome to Prosim Build System ###################"

What should i wirte in the CMakeLists.txt so that i can get like these in MakeFile?

Upvotes: 0

Views: 1103

Answers (1)

Dan Mašek
Dan Mašek

Reputation: 19071

You can use add_custom_target function to create a dummy target that has dependencies set to all other targets causing it to be built first.

You can use the ALL option to make it build every time. However, you will still need to use add_dependencies to make it build before every other target.

Finally, use the command-line tool mode of CMake to make it platform independent. (The COMMENT option of add_custom_target may be enough to show the message).

add_custom_target(display_intro ALL COMMAND cmake -E echo Foo)

# ....
add_executable(your_app ...)
add_dependencies(your_app display_intro)

add_library(your_lib ...)
add_dependencies(your_lib display_intro)

For convenience, you could probably wrap the add_executable and add_dependencies in a function or macro.

Upvotes: 1

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