'[CMake] Compile shared library and call it's functions'

[prev in list] [next in list] [prev in thread] [next in thread] 

List:       cmake
Subject:    [CMake] Compile shared library and call it's functions
From:       Ivan <ivan () sleepyiora ! pw>
Date:       2016-03-07 20:29:06
Message-ID: etPan.56dde492.2f543918.83c9 () MacBook-Pro ! local
[Download RAW message or body]

[Attachment #2 (multipart/alternative)]

Hello!
I hope someone could finally help me. I spent about two days to find solution for my \
problem, but with no luck.

Here is my problem:

I want to create a shared library (dll on Windows, .so on Linux, .dylib on OS X) that \
contains some functions. This library should export only these functions and nothing \
else. I guarantee that these function are pure C functions, so no C++ STL is needed \
to call them.

Then I want to create an application that call functions from the shared library \
mentioned above. I mean that the application should not have these functions inside. \
I want OS linker to link the application with the library at runtime, when it \
initializes the application. I know, how to do this on Windows with Visual Studio: \
create DLL project, write functions and compile, then there will be two files: .dll \
and .lib, link the .lib file with the application and at runtime Windows will find \
the .dll. But how can I do so with CMake?

Here is my CMakeLists.txt:

cmake_minimum_required(VERSION 3.3)
project(untitled19)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

set(LIBRARY_SRC library.cpp)

add_library(libra SHARED ${LIBRARY_SRC})

set(SOURCE_FILES main.cpp)
add_executable(untitled19 ${SOURCE_FILES})
target_link_libraries(untitled19 libra)

This works and both library and executable are compiled. Unfortunately library seems \
to be linked into the executable: ‘nm' command shows that the executable itself \
exports needed functions! I think there should be a solution for this, but I cannot \
find it. Can anyone help me? For more clarification: I'm using OS X El Capitan.
——
Best regards, Ivan.

[Attachment #5 (text/html)]

<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body \
style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: \
after-white-space;">Hello!<div>I hope someone could finally help me. I spent about \
two days to find solution for my problem, but with no \
luck.</div><div><br></div><div>Here is my problem:</div><div><br></div><div>I want to \
create a shared library (dll on Windows, .so on Linux, .dylib on OS X) that contains \
some functions. This library should export only these functions and nothing else. I \
guarantee that these function are pure C functions, so no C++ STL is needed to call \
them.</div><div><br></div><div>Then I want to create an application that call \
functions from the shared library mentioned above. I mean that the application should \
not have these functions inside. I want OS linker to link the application with the \
library at runtime, when it initializes the application. I know, how to do this on \
Windows with Visual Studio: create DLL project, write functions and compile, then \
there will be two files: .dll and .lib, link the .lib file with the application and \
at runtime Windows will find the .dll. But how can I do so with \
CMake?</div><div><br></div><div>Here is my \
CMakeLists.txt:</div><div><br></div><div><pre style="font-family: \
Menlo;">cmake_minimum_required(VERSION 3.3) project(untitled19)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

set(LIBRARY_SRC library.cpp)

add_library(libra SHARED ${LIBRARY_SRC})

set(SOURCE_FILES main.cpp)
add_executable(untitled19 ${SOURCE_FILES})
target_link_libraries(untitled19 libra)</pre><pre style="font-family: \
Menlo;"><br></pre><pre style="font-family: Menlo;">This works and both library and \
executable are compiled. Unfortunately library seems to be linked into the \
executable: ‘nm' command shows that the executable itself exports needed \
functions!</pre><pre style="font-family: Menlo;">I think there should be a solution \
for this, but I cannot find it. Can anyone help me?</pre><pre style="font-family: \
Menlo;">For more clarification: I'm using OS X El Capitan.</pre><pre \
style="font-family: Menlo;">——</pre><pre style="font-family: Menlo;">Best \
regards, Ivan.</pre><pre style="font-family: Menlo;"><br></pre><pre \
style="font-family: Menlo;"><br></pre></div></body></html>

-- 

Powered by www.kitware.com

Please keep messages on-topic and check the CMake FAQ at: \
http://www.cmake.org/Wiki/CMake_FAQ

Kitware offers various services to support the CMake community. For more information \
on each offering, please visit:

CMake Support: http://cmake.org/cmake/help/support.html
CMake Consulting: http://cmake.org/cmake/help/consulting.html
CMake Training Courses: http://cmake.org/cmake/help/training.html

Visit other Kitware open-source projects at \
http://www.kitware.com/opensource/opensource.html

Follow this link to subscribe/unsubscribe:
http://public.kitware.com/mailman/listinfo/cmake

[prev in list] [next in list] [prev in thread] [next in thread] 