c – 如何使用CMake链接多个库

概述我有一些与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.d 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;} elsecerr << "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)

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