Question

好吧，我知道此错误还有其他帖子，但我似乎无法找到解决我的问题的帖子。问题是当我尝试在Qt Creator中构建我的C ++项目时，我得到两个错误：1）symbol(s) not found for architecture x86_64和2）linker command failed with exit code 1 (use -v to see invocation)。代码构建并运行正常，直到我尝试使用FFTW-3.3.4库实现FFT。完整的编译器输出是：

14:55:10: Running steps for project RFdata...
14:55:10: Configuration unchanged, skipping qmake step.
14:55:10: Starting: "/usr/bin/make" 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr    /bin/clang++ -c -pipe -g -isysroot     /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDK    s/MacOSX10.9.sdk -mmacosx-version-min=10.7 -Wall -W -fPIE -DQT_CORE_LIB -    I../Qt/5.4/clang_64/mkspecs/macx-clang -I../RFdata -I../RFdata/fftw-    3.3.4/libbench2 -I../Qt/5.4/clang_64/lib/QtCore.framework/Versions/5/Headers -I. -    I. -F/Users/Mike/Desktop/Qt/5.4/clang_64/lib -o main.o ../RFdata/main.cpp
../RFdata/main.cpp:93:22: warning: comparison of integers of different signs:     'long' and 'size_type' (aka 'unsigned long') [-Wsign-compare]
  for (long i = 0; i < str.length(); ++i)                                                                                        //M:for loop that iterates through the length of the string and                                                                 //replaces each occurance of a ch1 with ch2
                   ~ ^ ~~~~~~~~~~~~
1 warning generated.
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr    /bin/clang++ -c -pipe -g -isysroot     /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDK    s/MacOSX10.9.sdk -mmacosx-version-min=10.7 -Wall -W -fPIE -DQT_CORE_LIB -    I../Qt/5.4/clang_64/mkspecs/macx-clang -I../RFdata -I../RFdata/fftw-    3.3.4/libbench2 -I../Qt/5.4/clang_64/lib/QtCore.framework/Versions/5/Headers -I. -    I. -F/Users/Mike/Desktop/Qt/5.4/clang_64/lib -o display_vector.o     ../RFdata/display_vector.cpp
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr    /bin/clang++ -c -pipe -g -isysroot     /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDK    s/MacOSX10.9.sdk -mmacosx-version-min=10.7 -Wall -W -fPIE -DQT_CORE_LIB -    I../Qt/5.4/clang_64/mkspecs/macx-clang -I../RFdata -I../RFdata/fftw-    3.3.4/libbench2 -I../Qt/5.4/clang_64/lib/QtCore.framework/Versions/5/Headers -I. -    I. -F/Users/Mike/Desktop/Qt/5.4/clang_64/lib -o convert_string.o     ../RFdata/convert_string.cpp
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr    /bin/clang++ -headerpad_max_install_names -Wl,-    syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/De    veloper/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.7 -Wl,-    rpath,/Users/Mike/Desktop/Qt/5.4/clang_64/lib -o RFdata main.o display_vector.o     convert_string.o   -F/Users/Mike/Desktop/Qt/5.4/clang_64/lib -    L/Users/Mike/Desktop/RFdata/fftw-3.3.4/libbench2/ -lbench2 -framework QtCore -    framework DiskArbitration -framework IOKit 
Undefined symbols for architecture x86_64:
  "_fftw_cleanup", referenced from:
      hilbert() in main.o
  "_fftw_destroy_plan", referenced from:
      hilbert() in main.o
  "_fftw_execute", referenced from:
      hilbert() in main.o
  "_fftw_plan_dft_1d", referenced from:
      hilbert() in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see     invocation)
make: *** [RFdata] Error 1
14:55:11: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project RFdata (kit: Desktop Qt 5.4.0 clang     64bit)
When executing step "Make"
14:55:11: Elapsed time: 00:01.

我完全没有链接库的经验，所以任何帮助都绝对是惊人的！我应该展示我的.pro文件所说的内容，因为根据我的理解，在.pro文件中添加正确的行可能是成功链接到库之间的区别而不是成功！的.pro：

QT       += core

QT       -= gui

TARGET = RFdata
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app


SOURCES += main.cpp \
    display_vector.cpp \
    convert_string.cpp

HEADERS += \
    display_vector.h \
    convert_string.h

macx: LIBS += -L$$PWD/fftw-3.3.4/libbench2/ -lbench2

INCLUDEPATH += $$PWD/fftw-3.3.4/libbench2
DEPENDPATH += $$PWD/fftw-3.3.4/libbench2

macx: PRE_TARGETDEPS += $$PWD/fftw-3.3.4/libbench2/libbench2.a

所以，我想最重要的问题，虽然我意识到它是一个非常通用且可能很简单的问题，但我如何在我的mac上成功将fftw-3.3.4库链接到我的ct creator 3.3中的c ++项目（OSX 10.9.5）?????这让我疯了！

Answer 1

看起来您正在尝试将32位库链接到64位可执行文件。要么寻找64位库，要么将其编译为32位程序。

clang：错误：链接器命令失败，退出代码为1（使用-v查看调用） - Qt Creator 3.3

1 个答案: