Hi everyone,
I have been using cmake for quite a while now. I am using 2.4.6 on NetBSD.
Among other things I do a dependency build automatically, based on a well-known
directory
tree.
For example lets say you have :
CMakeLists.txt
Source1.c
depends/subprojA/
depends/subprojA/CMakeLists.txt - defining a new project that can be used
separately.
depends/subprojA/SourceSubprojA.c
This works well.
My problem arise when I want to have two or more main targets ( lets say you
add Source2.c to the previous example ) to get two executables using the same
library for example.
The depends target gets cmake'd twice by the following code as expected (
simplified a lot because I do that in more complex generic cmake scripts ):
[...snip...]
MACRO (Build)
FOREACH ( looparg ${ARGN} )
GET_FILENAME_COMPONENT(exename ${looparg} NAME_WE )
ADD_EXECUTABLE(${exename} ${looparg})
ADD_SUBDIRECTORY(depends/subprojA depends/subprojA_build
EXCLUDE_FROM_ALL)
TARGET_LINK_LIBRARIES(${exename} subprojA)
ADD_DEPENDENCIES(${exename} subprojA)
ENDFOREACH ( looparg )
ENDMACRO (BuildDepends)
[...snip...]
FILE ( GLOB sourcelist ${CMAKE_SOURCE_DIR} *.c)
Build( ${sourcelist} )
[...snip...]
And cmake gives me lots of warnings :
make: "CMakeFiles/CMakeFiles/Makefile2" line 402: warning: duplicate script for
target "depends/subprojA_build/CMakeFiles/subprojA.dir/all" ignored
make: "CMakeFiles/CMakeFiles/Makefile2" line 250: warning: using previous
script for "depends/subprojA_build/CMakeFiles/subprojA.dir/all" defined here
Although it works ;)
What I need to do is : Not to do the ADD_SUBDIRECTORY if this subdirectory has
just been cmaked, *_without_* taking the ADD_SUBDIRECTORY out of the loop or
out of the macro of course ;)
My actual macro is more complex and provide a way to build and link custom
dependencies only if needed. But I dont know how to check this dependency has
been already made in this cmake call.
I just want to avoid the cmaking of it if possible, to avoid the warnings...
The build will still run fine.
So I wonder if there is a way to check if a target has already been added ? how
can I get the list of target ?
Can do a check on the subdirectory to make sure I just entered it for the first
time in this " $ cmake sourcedir " call ?
Maybe another way to check something that will be enough so that I am assured
that depends/subprojectA will be built once and once only if needed ?
I know I could build it manually, but I still want depends/subprojectA to build
automatically with only one "cmake . && make" call
I can provide you with my cmake scripts, but I think it will be more of a
trouble than a help to solve this little problem, probably coming of my lack of
knowledge.
They are available here anyway if you want them :
https://asmodehn.fr/trac/Workshop/browser/trunk/CMake although probably not the
last version I am talking about here.
I hope I have been clear enough on my problem ;) Dont hesitate to ask me more
questions if you want more informations.
Thank you very much for your help :)
--
Asmodehn
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