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[英]MySQL Connector/C++ OS X 10.9 Mavericks and XCODE 5.0.2
[英]C++ linking error after upgrading to Mac OS X 10.9 / Xcode 5.0.1
升級到Mac OS X 10.9 / Xcode 5.0.1后,創建共享庫(.dylib)的命令行失敗,出現了幾個未定義的符號。
clang++ -dynamiclib -install_name test.dylib *.o -o test.dylib
Undefined symbols for architecture x86_64:
"std::allocator<char>::allocator()", referenced from:
_main in test.o
"std::allocator<char>::~allocator()", referenced from:
_main in test.o
"std::ostream::operator<<(std::ostream& (*)(std::ostream&))", referenced from:
_main in test.o
"std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)", referenced from:
_main in test.o
"std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()", referenced from:
_main in test.o
"std::ios_base::Init::Init()", referenced from:
___cxx_global_var_init in test.o
"std::ios_base::Init::~Init()", referenced from:
___cxx_global_var_init in test.o
"std::cout", referenced from:
_main in test.o
"std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)", referenced from:
_main in test.o
"std::basic_ostream<char, std::char_traits<char> >& std::operator<<<char, std::char_traits<char>, std::allocator<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)", referenced from:
_main in test.o
ld: symbol(s) not found for architecture x86_64
答案是: https : //mathematica.stackexchange.com/questions/34692/mathlink-linking-error-after-os-x-10-9-mavericks-upgrade
OS X上有兩種標准C ++庫實現:libstdc ++和libc ++。 它們不是二進制兼容的,libMLi3需要libstdc ++。
在10.8及更早版本中,默認選擇libstdc ++,默認情況下選擇10.9 libc ++。 為確保與libMLi3的兼容性,我們需要手動選擇libstdc ++。
為此,請將-stdlib = libstdc ++添加到鏈接命令。
相關文章: 使用Libc ++未定義引用與Clang進行編譯
編輯 :經過一些調查后,似乎-mmacosx-version-min
與默認libstd
的選擇之間存在聯系。 如果min version <10.9,那么默認的libstd
等於libstdc++
,否則等於libc++
。 長期解決方案顯然是使用-stdlib=libc++
這些建議對Mac El capitan不起作用。 如果您在升級到El Capitan后遇到類似問題,請運行
xcode-select --install
在嘗試編譯之前
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