> cat CMakeLists.txt 
CMAKE_MINIMUM_REQUIRED(VERSION 2.8.9)

PROJECT(cmakeshared)

set (BUILD_SHARED_LIBS ON)
SET (CMAKE_VERBOSE_MAKEFILE ON)

add_library (mylib SHARED mysrc.cpp)

> cat mysrc.cpp 
int myfunc(int c)
{
        return c;
}

> mkdir build && cd build && cmake .. && make
-- The C compiler identification is GNU 4.2.1
-- The CXX compiler identification is GNU 4.2.1
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/cerutti/ctest/cmake-shared/build
/usr/local/bin/cmake -H/home/cerutti/ctest/cmake-shared -B/home/cerutti/ctest/cmake-shared/build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/local/bin/cmake -E cmake_progress_start /home/cerutti/ctest/cmake-shared/build/CMakeFiles /home/cerutti/ctest/cmake-shared/build/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make -f CMakeFiles/mylib.dir/build.make CMakeFiles/mylib.dir/depend
cd /home/cerutti/ctest/cmake-shared/build && /usr/local/bin/cmake -E cmake_depends "Unix Makefiles" /home/cerutti/ctest/cmake-shared /home/cerutti/ctest/cmake-shared /home/cerutti/ctest/cmake-shared/build /home/cerutti/ctest/cmake-shared/build /home/cerutti/ctest/cmake-shared/build/CMakeFiles/mylib.dir/DependInfo.cmake --color=
Scanning dependencies of target mylib
make -f CMakeFiles/mylib.dir/build.make CMakeFiles/mylib.dir/build
/usr/local/bin/cmake -E cmake_progress_report /home/cerutti/ctest/cmake-shared/build/CMakeFiles 1
[100%] Building CXX object CMakeFiles/mylib.dir/mysrc.cpp.o
/usr/bin/c++   -Dmylib_EXPORTS  -o CMakeFiles/mylib.dir/mysrc.cpp.o -c /home/cerutti/ctest/cmake-shared/mysrc.cpp
Linking CXX shared library libmylib.so
/usr/local/bin/cmake -E cmake_link_script CMakeFiles/mylib.dir/link.txt --verbose=1
/usr/bin/c++  -fPIC    -shared -Wl,-soname,libmylib.so -o libmylib.so CMakeFiles/mylib.dir/mysrc.cpp.o 
/usr/bin/ld: CMakeFiles/mylib.dir/mysrc.cpp.o: relocation R_X86_64_32 against `__gxx_personality_v0' can not be used when making a shared object; recompile with -fPIC
CMakeFiles/mylib.dir/mysrc.cpp.o: could not read symbols: Bad value
*** [libmylib.so] Error code 1

Stop in /usr/home/cerutti/ctest/cmake-shared/build.
*** [CMakeFiles/mylib.dir/all] Error code 1

Stop in /usr/home/cerutti/ctest/cmake-shared/build.
*** [all] Error code 1

Stop in /usr/home/cerutti/ctest/cmake-shared/build.

>