is this library required to be separate from the executable?
No in this specific case, but, the question still holds from a general
comprenhension of CMake (I'd like to get !...) and the answer may be yes
in futur cases.
I tested your proposal (need to add target_include_directories to find
headers) :
# in MyLib/CmakeLists.txt
add_library( MyLib <STATIC/SHARED; default STATIC> libsource1.c
libsource2.cpp )
# in MyExe/CmakeLists.txt
add_exectubable( MyExe exesource1.c )
target_include_directories(myExe PUBLIC ../myLib/hdr)
target_link_libraries( MyExe MyLib )
This is working, so OK I can use that. But what if the user wants to
build myLib as a .a or a .so ? It seems it not possible to change that
from ccmake (I've just checked). It should be possible when using
Find*.cmake, no ?
... But, precisely, when typing target_include_directory you need to
know the path to headers directory (+ path to libraries directory ?):
this is why I felt like "Okay, I need to write a FindMyLib.cmake to
handle this". My understanding is that a (internal or external) library
is a library, so, it should be managed with a FindMyLib.cmake. Am I
correct ? (I try to understand the "CMake way" to do thing - I am more
an autotools user, so, I just try to understand CMake)
Franck
Le 2015-11-13 18:53, J Decker a écrit :
On Fri, Nov 13, 2015 at 9:51 AM, J Decker <[email protected]> wrote:
is this library required to be separate from the executable?
If not; it's far easier...
# in MyLib/CmakeLists.txt
add_library( MyLib <STATIC/SHARED; default STATIC> libsource1.c
libsource2.cpp )
# in MyExe/CmakeLists.txt
add_exectubable( MyExe exesource1.c )
target_link_libraries( MyExe MyLib )
theose can be spread ito sepatate CMakeLists... with a root
CmakeLists.txt like...
---
cmake_minimum_version(something)
add_subdirectory( mylib )
add_subdirectory( myExe)
On Fri, Nov 13, 2015 at 9:28 AM, houssen <[email protected]> wrote:
Hello,
How to write a library (myLib as .a or .so) that can be used from
an
executable (myExe) ?
I read the CMake doc but, obviously, I still miss some major points
!... My
understanding is that, I need :
- to write a FindMyLib.cmake for myExe to find myLib (= finding
include/library directories, and, libraries to link with)
- to use find_package from myExe to find myLib
I tried to write a mini-project (attached to this mail) to do that
but it
doesn't work: find_package doesn't find FindMyLib.cmake although
CMAKE_MODULE_PATH has been updated.
Can somebody help me on making this project to work ? (not able to
find
FindMyLib.cmake, not sure to know the "good" way to write
FindMyLib.cmake,
others... - I would appreciate any remarks to explain me the "good"
way to
do thing)
Thanks,
Franck
Note: I set CMAKE_MODULE_PATH in the CMakeLists.txt of myLib (doing
that
from myExe sounds not relevant: if you know where the package is,
no need to
call find_package).
Note: my understanding is that when this will work, I would be
possible to
build myLib as a .a or a .so, am I correct ?
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