I have a custom target, and I want it to depend on the default target (the one that is built with make).
add_custom_target(foo ....)
add_dependency(foo default_target_name_goes_here)
What is the name of the default target?
I've tried ALL, ALL_BUILD, MyProjectsName, DEFAULT,...
Finding anything in the CMake documentation is always an unsuccessful adventure...
UPDATE: it seems CMake was designed in such a way that this is extremely hard to fix/implement: bugreport getting +1's since 2009. Who indeed would like to have a custom target that depends on, for example, the all target? Or in other words: who does ever write make && make test?...
The default build target does not exist as a CMake target at CMake configure time. It is only exists in the generated build system. Therefore it is not possible to have the default target depend on a custom target.
I think a possible solution depends strongly on the use case. E.g. if this is for executing a test after the system has been build you would use CTest instead of calling make directly.
To your CMakeLists.txt you would add:
add_test(NAME foo COMMAND ...)
and then use CTest for building and executing:
ctest --build-and-test ...
More generally speaking and not considering the question of why you would like to do it - I think the best thing would be to just name and rely on concrete target dependencies instead of just taking ALL targets - I just wanted to add two possibilities to do what you wanted to do.
One would be to determine/track the list of all targets used as discussed here. This would look e.g. for library targets like this (getting your own/private GlobalTargetList):
macro(add_library _target)
_add_library(${_target} ${ARGN})
set_property(GLOBAL APPEND PROPERTY GlobalTargetList ${_target})
endmacro()
and use it at the end of your main CMakeLists.txt with
get_property(_allTargets GLOBAL PROPERTY GlobalTargetList)
add_dependencies(foo ${_allTargets})
Edit: Global BUILDSYSTEM_TARGETS property was released with CMake 3.7
The second - less favorable - approach does require that the foo target is not part of the ALL build (otherwise you end-up in an endless loop):
add_custom_target(foo)
set_target_properties(foo PROPERTIES EXCLUDE_FROM_ALL 1)
add_custom_command(
TARGET foo
PRE_BUILD
COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target ALL_BUILD --config $<CONFIGURATION>
)
