C++ OS X编译错误：未找到体系结构x86_64的ld:symbol

新来这里编译的，请耐心听我说。我尝试在OXX.103上编译一些C++代码，使用<代码>制作< /C>。我已经安装了XCode 6.3.1。我的Makefile是使用qmake生成的。编译器运行良好，直到尝试运行最终生成命令并抛出错误：

Undefined symbols for architecture x86_64:
  "_iconv", referenced from:
      puntoexe::charsetConversionIconv::myIconv(void*, char*, unsigned long) const in charsetConversionIconv.o
  "_iconv_close", referenced from:
      puntoexe::charsetConversionIconv::close() in charsetConversionIconv.o
  "_iconv_open", referenced from:
      puntoexe::charsetConversionIconv::initialize(int) in charsetConversionIconv.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: *** [dicom2jpeg.app/Contents/MacOS/dicom2jpeg] Error 1

我发现这里有多个线程描述了一个类似的问题，很明显，这归结为编译器链接到一个32位库。对其他人有效的主要建议是将以下代码添加到Makefile中：

-stdlib=libstdc++

qmake生成的Makefile如下所示：

CC            = clang
CXX           = clang++
DEFINES       = -DQT_NO_DEBUG
CFLAGS        = -pipe -mmacosx-version-min=10.7 -O2 -arch x86_64 -Wall -W $(DEFINES)
CXXFLAGS      = -pipe -stdlib=libc++ -mmacosx-version-min=10.7 -O2 -arch x86_64 -Wall -W $(DEFINES)
INCPATH       = -I/usr/local/Cellar/qt/4.8.6/mkspecs/unsupported/macx-clang-libc++ -I. -I/usr/local/Cellar/qt/4.8.6/include -I.
LINK          = clang++
LFLAGS        = -headerpad_max_install_names -stdlib=libc++ -mmacosx-version-min=10.7 -arch x86_64
LIBS          = $(SUBLIBS)  -L/usr/local/Cellar/qt/4.8.6/lib -lpthread

因此，我已将Makefile更改为链接到相应的库：

CC            = clang
CXX           = clang++
DEFINES       = -DQT_NO_DEBUG
CFLAGS        = -pipe -mmacosx-version-min=10.7 -O2 -arch x86_64 -Wall -W $(DEFINES)
CXXFLAGS      = -pipe -stdlib=libstdc++ -mmacosx-version-min=10.7 -O2 -arch x86_64 -Wall -W $(DEFINES)
INCPATH       = -I/usr/local/Cellar/qt/4.8.6/mkspecs/unsupported/macx-clang-libc++ -I. -I/usr/local/Cellar/qt/4.8.6/include -I.
LINK          = clang++
LFLAGS        = -headerpad_max_install_names -stdlib=libstdc++ -mmacosx-version-min=10.7 -arch x86_64
LIBS          = $(SUBLIBS)  -L/usr/local/Cellar/qt/4.8.6/lib -lpthread

---

但是，没有骰子。仍然在最终构建时抛出相同的错误。我错过什么了吗

您可以包括其余的链接器错误消息，特别是找不到哪些符号吗？当然，只添加了它们。您是否在charsetconversionv.cpp中有

#include

？链接器必须链接到

libiconv.dylib

库。您必须将

-liconv

标志添加到

LDFLAGS

或在Xcode项目中添加库。我认为不需要

-stdlib=libstdc++

。-LDFLAGS中添加的liconv有效。谢谢，巴夫。如果你加上答案，我就+1给你。