在我的 Swift 应用程序中添加了一个 C++ 组件,通过命令行编译和运行。现在需要编译 C++ 和 Objective-C++ (*.mm) 文件,并将它们与 Swift 应用程序链接。
Makefile:
编译器出现以下错误:
我错过了什么?
Makefile:
all: foo-renderer
clean:
rm -f foo-renderer cpp.o objc.o
cpp.o: FooRenderer/FooRenderer/FooLibrary.cpp
clang++ -c -o $@ $^
objc.o: cpp.o FooRenderer/FooRenderer/FooLibraryWrapper.mm
clang++ -c -framework Foundation -o $@ $^
foo-renderer: objc.o FooRenderer/FooRenderer/*.swift
xcrun -sdk macosx swiftc -import-objc-header FooRenderer/FooRenderer/FooRenderer-Bridging-Header.h -o $@ $^
编译器出现以下错误:
ld: warning: object file (objc.o) was built for newer OSX version (10.12) than being linked (10.9)
Undefined symbols for architecture x86_64:
"__ZN11FooLibrary23printifyERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE", referenced from:
-[FooLibraryWrapper printify:] in objc.o
"__ZN11FooLibrary8optimizeERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEE", referenced from:
-[FooLibraryWrapper optimize:] in objc.o
"__ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEPKcm", referenced from:
-[FooLibraryWrapper printify:] in objc.o
-[FooLibraryWrapper optimize:] in objc.o
"__ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEED1Ev", referenced from:
-[FooLibraryWrapper printify:] in objc.o
-[FooLibraryWrapper optimize:] in objc.o
"__ZSt9terminatev", referenced from:
___clang_call_terminate in objc.o
"___cxa_begin_catch", referenced from:
___clang_call_terminate in objc.o
"___gxx_personality_v0", referenced from:
-[FooLibraryWrapper printify:] in objc.o
-[FooLibraryWrapper optimize:] in objc.o
Dwarf Exception Unwind Info (__eh_frame) in objc.o
ld: symbol(s) not found for architecture x86_64
我的第一反应是标准的C++库没有被包含进来。我尝试将以下lib标记添加到命令中,但是没有成功:
cpp.o: FooRenderer/FooRenderer/FooLibrary.cpp
clang++ -c --std=c++14 -lstdc++ -lc++ -stdlib=libstdc++ -o $@ $^
我错过了什么?