c – 如何使用CMake链接多个库

我有一些与DCMTK有关的代码.如果我从命令行使用g,我可以成功构建并运行它.这是代码：

#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmdata/dctk.h"

int main()
{
DcmFileFormat fileformat;
OFCondition status = fileformat.loadFile("test.dcm");
if (status.good())
{
   OFString patientsName;
   if (fileformat.getDataset()->findAndGetOFString(DCM_PatientsName,patientsName).good())
   {
      cout << "Patient's Name: " << patientsName << endl;
   } else
     cerr << "Error: cannot access Patient's Name!" << endl;
} else
cerr << "Error: cannot read DICOM file (" << status.text() << ")" << endl;
return 0;
}

这是构建命令：

g++ testeapp.cxx -DHAVE_CONFIG_H -I/path_to_dcmtk/include -L/path_to_dcmtk/lib -pthread -ldcmdata -lz -loflog -lofstd -o main

我想制作一个CMakeLists.txt来在Kdevelop中构建它.这就是我目前拥有的：

# Configure toplevel directories
    SET( PREFIX     ${CMAKE_INSTALL_PREFIX} CACHE PATH "Top level.")
    SET( INCLUDEDIR ${PREFIX}/include       CACHE PATH "Include files.")
    SET( LIBDIR     ${PREFIX}/lib           CACHE PATH "Libraries.")
    FIND_PACKAGE ( Threads required )
    # Configure DCMTK
    FIND_PATH( DINIFTI_DCMTK_INCLUDE dcmtk
               PATHS ${INCLUDEDIR}
               PATH_SUFFIXES dcmtk
               DOC "Path to the DCMTK headers." )
    FIND_LIBRARY(DINIFTI_DCMTK_LIB NAMES dcmdata ofstd oflog 
                 HINTS ${LIBDIR} ${LIBDIR})
TARGET_LINK_LIBRARIES( dinifti ${DINIFTI_DCMTK_LIB}
                               ${DINIFTI_ZNZ_LIB}
                               ${CMAKE_THREAD_LIBS_INIT}
                               z )

但是当我构建它时,它有这个错误：

/usr/local/lib/libdcmdata.a(dcfilefo.o): In function `DcmFileFormat::remove(DcmItem*)':
dcfilefo.cc:(.text+0x1788): undefined reference to `log4cplus::Logger::forcedLog(int,OFString const&,char const*,int,char const*) const'

你能帮我修一下这个错误吗？谢谢.

解决方法

看起来您希望 find_library调用使用3个单独的库填充变量DINIFTI_DCMTK_LIB.

这不是find_library的工作原理. NAMES之后的不同参数表示可以调用单个库的所有各种名称.这允许命令跨平台工作,其中相同的库可以在不同平台上被称为不同的东西.

一个小问题是你可能更喜欢在这里使用PATHS而不是HINTS.形成文档：

… the HINTS option … should be paths computed by system introspection,such as a hint provided by the location of another item already found. Hard-coded guesses should be specified with the PATHS option.

我想你想要更像的东西：

find_library(DINIFTI_DCMTK_LIB NAMES dcmdata PATHS ${LIBDIR})
find_library(OFSTD_LIB NAMES ofstd PATHS ${LIBDIR})
find_library(OFLOG_LIB NAMES oflog PATHS ${LIBDIR})
target_link_libraries(dinifti ${DINIFTI_DCMTK_LIB}
                              ${OFLOG_LIB}
                              ${OFSTD_LIB}
                              ${DINIFTI_ZNZ_LIB}
                              ${CMAKE_THREAD_LIBS_INIT}
                              z)

c – 如何使用CMake链接多个库

解决方法

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