将cmake与共享库一起使用

Question

所以我试图让一个示例poco程序运行与cmake一起运行。来自here。

#include <Poco/String.h>
using Poco::trim;
using Poco::trimLeft;
using Poco::trimRight;
using Poco::trimRightInPlace;
#include <iostream>
int main(int argc, char** argv)
{
  std::string hello("   This is a silly string.   ");
  std::cout << hello << std::endl;   
  std::string s1(trimLeft(hello)); 
  trimRightInPlace(s1); 
  std::string s2(trim(hello)); 
  std::cout << s2 << std::endl;   
  return 0;
}

我可以编译并运行此命令中的代码。

g++ -o silly silly.cpp -L/usr/local/lib -lPocoFoundation -I/usr/local/include/poco

但是当我尝试将cmake与这样的文件一起使用时。

cmake_minimum_required (VERSION 2.6)
project (Silly)
ADD_DEFINITIONS(
-std=c++11
)
# the version number
set (Silly_VERSION_MAJOR 0)
set (Silly_VERSION_MINOR 1)

include_directories (${PROJECT_BINARY_DIR})
include_directories ("/usr/local/include/poco")
include_directories ("/usr/local/lib")
# add the libs
set (EXTRA_LIBS ${EXTRA_LIBS} PocoFoundation)
# add the executable
add_executable (Silly silly.cpp)
target_link_libraries (Silly ${EXTRA_LIBS})

我收到此错误。

CMakeFiles/Silly.dir/silly.cpp.o: In function `Poco::Ascii::properties(int)':
silly.cpp:(.text._ZN4Poco5Ascii10propertiesEi[_ZN4Poco5Ascii10propertiesEi]+0x21): undefined reference to `Poco::Ascii::CHARACTER_PROPERTIES'
collect2: error: ld returned 1 exit status
make[2]: *** [Silly] Error 1
make[1]: *** [CMakeFiles/Silly.dir/all] Error 2
make: *** [all] Error 2

这是我的详细输出

/usr/bin/c++    -I/home/matt/projects/billy/build -I/usr/local/include/poco -I/usr/local/lib    -std=c++11 -o CMakeFiles/Silly.dir/silly.cpp.o -c /home/matt/projects/billy/src/silly.cpp
Linking CXX executable Silly
/usr/bin/cmake -E cmake_link_script CMakeFiles/Silly.dir/link.txt --verbose=1
/usr/bin/c++       CMakeFiles/Silly.dir/silly.cpp.o  -o Silly -rdynamic -lPocoFoundation 
CMakeFiles/Silly.dir/silly.cpp.o: In function `Poco::Ascii::properties(int)':
silly.cpp:(.text._ZN4Poco5Ascii10propertiesEi[_ZN4Poco5Ascii10propertiesEi]+0x21): undefined reference to `Poco::Ascii::CHARACTER_PROPERTIES'
collect2: error: ld returned 1 exit status
make[2]: *** [Silly] Error 1
make[2]: Leaving directory `/home/matt/projects/billy/build'
make[1]: *** [CMakeFiles/Silly.dir/all] Error 2
make[1]: Leaving directory `/home/matt/projects/billy/build'
make: *** [all] Error 2