我正在尝试将google AdMobs集成到我的iOS应用中，但为了使用他们的SDK，我需要使用-ObjC链接器标志来加载他们的类别方法。没有链接器，一切都很完美，但是当我在Debug和Release下的Xcode中添加-ObjC标志时，我得到了一个巨大的Mach-O链接器错误列表（如下）。
我正在使用Box2D，它同时使用C和C ++，所以起初我以为我只需要包含相应的链接器标志，但我找不到修复错误的标志。
我还尝试导入libstdc ++。dylib库，它删除了原始的链接器错误，而是用错误替换它们，声称我的CCScrollLayer中有大量的重复符号。
我很茫然。任何帮助都会非常非常感激。
-Objc错误：
Undefined symbols for architecture i386:
"std::string::c_str() const", referenced from:
TiXmlElement* createValueElm<int>(char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<float>(char const*, float) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<long long>(char const*, long long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned long>(char const*, unsigned long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned int>(char const*, unsigned int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<char const*>(TiXmlElement*, char const*, char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<int>(TiXmlElement*, char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
...
"std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::str() const", referenced from:
TiXmlElement* createValueElm<int>(char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<float>(char const*, float) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<long long>(char const*, long long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned long>(char const*, unsigned long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned int>(char const*, unsigned int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<char const*>(TiXmlElement*, char const*, char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<int>(TiXmlElement*, char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
...
"std::allocator<char>::allocator()", referenced from:
float stringToValue<float>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
int stringToValue<int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned int stringToValue<unsigned int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned long stringToValue<unsigned long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
long long stringToValue<long long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::allocator<char>::~allocator()", referenced from:
float stringToValue<float>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
int stringToValue<int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned int stringToValue<unsigned int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned long stringToValue<unsigned long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
long long stringToValue<long long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::istream::operator>>(float&)", referenced from:
float stringToValue<float>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::istream::operator>>(int&)", referenced from:
int stringToValue<int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::istream::operator>>(unsigned int&)", referenced from:
unsigned int stringToValue<unsigned int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::istream::operator>>(unsigned long&)", referenced from:
unsigned long stringToValue<unsigned long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::istream::operator>>(long long&)", referenced from:
long long stringToValue<long long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::ostream::operator<<(float)", referenced from:
TiXmlElement* createValueElm<float>(char const*, float) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<float>(TiXmlElement*, char const*, float) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::ostream::operator<<(int)", referenced from:
TiXmlElement* createValueElm<int>(char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<int>(TiXmlElement*, char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::ostream::operator<<(unsigned int)", referenced from:
TiXmlElement* createValueElm<unsigned int>(char const*, unsigned int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::ostream::operator<<(unsigned long)", referenced from:
TiXmlElement* createValueElm<unsigned long>(char const*, unsigned long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::ostream::operator<<(long long)", referenced from:
TiXmlElement* createValueElm<long long>(char const*, long long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)", referenced from:
float stringToValue<float>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
int stringToValue<int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned int stringToValue<unsigned int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned long stringToValue<unsigned long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
long long stringToValue<long long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()", referenced from:
TiXmlElement* createValueElm<int>(char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<float>(char const*, float) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<long long>(char const*, long long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned long>(char const*, unsigned long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned int>(char const*, unsigned int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<char const*>(TiXmlElement*, char const*, char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<int>(TiXmlElement*, char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
...
"std::basic_istringstream<char, std::char_traits<char>, std::allocator<char> >::basic_istringstream(std::string const&, std::_Ios_Openmode)", referenced from:
float stringToValue<float>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
int stringToValue<int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned int stringToValue<unsigned int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned long stringToValue<unsigned long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
long long stringToValue<long long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::basic_istringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_istringstream()", referenced from:
float stringToValue<float>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
int stringToValue<int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned int stringToValue<unsigned int>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
unsigned long stringToValue<unsigned long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
long long stringToValue<long long>(char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::basic_ostringstream(std::_Ios_Openmode)", referenced from:
TiXmlElement* createValueElm<int>(char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<float>(char const*, float) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<long long>(char const*, long long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned long>(char const*, unsigned long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned int>(char const*, unsigned int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<char const*>(TiXmlElement*, char const*, char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<int>(TiXmlElement*, char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
...
"std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::~basic_ostringstream()", referenced from:
TiXmlElement* createValueElm<int>(char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<float>(char const*, float) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<long long>(char const*, long long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned long>(char const*, unsigned long) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
TiXmlElement* createValueElm<unsigned int>(char const*, unsigned int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<char const*>(TiXmlElement*, char const*, char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
void setAttribute<int>(TiXmlElement*, char const*, int) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
...
"std::_Rb_tree_decrement(std::_Rb_tree_node_base*)", referenced from:
std::_Rb_tree_iterator<std::pair<long long const, cpShape*> >::operator--() in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
std::_Rb_tree_iterator<std::pair<long long const, cpBody*> >::operator--() in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::_Rb_tree_increment(std::_Rb_tree_node_base*)", referenced from:
std::_Rb_tree_iterator<std::pair<long long const, cpShape*> >::operator++() in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
std::_Rb_tree_iterator<std::pair<long long const, cpBody*> >::operator++() in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::_Rb_tree_insert_and_rebalance(bool, std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::_Rb_tree_node_base&)", referenced from:
std::_Rb_tree<long long, std::pair<long long const, cpShape*>, std::_Select1st<std::pair<long long const, cpShape*> >, std::less<long long>, std::allocator<std::pair<long long const, cpShape*> > >::_M_insert(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::pair<long long const, cpShape*> const&) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
std::_Rb_tree<long long, std::pair<long long const, cpBody*>, std::_Select1st<std::pair<long long const, cpBody*> >, std::less<long long>, std::allocator<std::pair<long long const, cpBody*> > >::_M_insert(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::pair<long long const, cpBody*> const&) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
"std::basic_ostream<char, std::char_traits<char> >& std::operator<<<std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)", referenced from:
void setAttribute<char const*>(TiXmlElement*, char const*, char const*) in libchipmunk-spacemanager-ios.a(cpSpaceSerializer.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
libstdc ++。dylib的错误：
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.layers_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.currentScreen_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.pagesIndicatorNormalColor_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.pagesIndicatorSelectedColor_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.prevScreen_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.scrollTouch_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.startSwipe_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.state_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.marginOffset_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.delegate_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.minimumTouchLengthToSlide_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.minimumTouchLengthToChangePage_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.showPagesIndicator_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.pagesIndicatorPosition_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.pagesWidthOffset_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_IVAR_$_CCScrollLayer.stealTouches_ in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_CLASS_$_CCScrollLayer in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
duplicate symbol _OBJC_METACLASS_$_CCScrollLayer in:
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Intermediates/ballBounce.build/Debug-iphonesimulator/ballBounce-iOS.build/Objects-normal/i386/CCScrollLayer.o
/Users/Stevenpd/Library/Developer/Xcode/DerivedData/Kobold2D-bhlexwnjvtnneigernvsargfadgb/Build/Products/Debug-iphonesimulator/libcocos2d-extensions-ios.a(CCScrollLayer.o)
ld: 18 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)