我不知道发生了什么；突然之间，我开始收到此错误。我尝试重新移动和重新添加 Core Plot，但它似乎没有改变任何东西。核心情节最初没有给我任何错误，但现在我得到以下信息：
clang: error: -Z-reserved-lib-stdc++: 'linker' input unused when '-c' is present
Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang failed with exit code 1
我在stackoverflow上看到过类似的问题，但是a）他们没有帮助我，b）这是XCode（4.5.1）的较新版本，所以也许这是问题的一部分？
谢谢你的帮助。
编辑：与此同时，我切换到静态库安装，这似乎有效。我真的不知道其中一个的区别/优势，除了更新依赖项目安装可能更容易？（对不起我的菜鸟）更多细节：
CompileC /Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/Objects-normal/i386/CPTPlot.o Source/CPTPlot.m normal i386 objective-c com.apple.compilers.llvm.clang.1_0.compiler
cd /Users/username/Developer/appname/CorePlot_1.0/Source/framework
setenv LANG en_US.US-ASCII
setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x objective-c -arch i386 -fmessage-length=0 -std=c99 -Wno-trigraphs -fpascal-strings -O0 -Werror -Wmissing-field-initializers -Wmissing-prototypes -Wreturn-type -Wno-implicit-atomic-properties -Wno-receiver-is-weak -Wformat -Wmissing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wno-empty-body -Wno-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wsign-compare -Wno-shorten-64-to-32 -Wpointer-sign -Wnewline-eof -Wno-selector -Wno-strict-selector-match -Wno-undeclared-selector -Wno-deprecated-implementations -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk -fexceptions -fasm-blocks -Wprotocol -Wdeprecated-declarations -g -Wno-sign-conversion -fobjc-abi-version=2 -fobjc-legacy-dispatch "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -mios-simulator-version-min=3.1.3 -iquote /Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/CorePlot-CocoaTouch-generated-files.hmap -I/Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/CorePlot-CocoaTouch-own-target-headers.hmap -I/Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/CorePlot-CocoaTouch-all-target-headers.hmap -iquote /Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/CorePlot-CocoaTouch-project-headers.hmap -I/Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Products/Debug-iphonesimulator/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/DerivedSources/i386 -I/Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/DerivedSources -F/Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Products/Debug-iphonesimulator -lstdc++ -falign-loops=16 -MMD -MT dependencies -MF /Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/Objects-normal/i386/CPTPlot.d --serialize-diagnostics /Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/Objects-normal/i386/CPTPlot.dia -c /Users/username/Developer/appname/CorePlot_1.0/Source/framework/Source/CPTPlot.m -o /Users/username/Library/Developer/Xcode/DerivedData/appname-cbzeyejhjnktceepdvakngcfqjhy/Build/Intermediates/CorePlot-CocoaTouch.build/Debug-iphonesimulator/CorePlot-CocoaTouch.build/Objects-normal/i386/CPTPlot.o