将C++组件添加到正在编译并通过命令行运行的Swift应用程序后,我现在需要编译C++和Objective-C++(* .mm)文件并将它们与Swift应用程序链接起来。通过命令行编译和链接Swift/Objective-C++应用程序
的Makefile:
all: foo-renderer
clean:
rm -f foo-renderer cpp.o objc.o
cpp.o: FooRenderer/FooRenderer/FooLibrary.cpp
clang++ -c -o [email protected] $^
objc.o: cpp.o FooRenderer/FooRenderer/FooLibraryWrapper.mm
clang++ -c -framework Foundation -o [email protected] $^
foo-renderer: objc.o FooRenderer/FooRenderer/*.swift
xcrun -sdk macosx swiftc -import-objc-header FooRenderer/FooRenderer/FooRenderer-Bridging-Header.h -o [email protected] $^
编译器失败,这些错误:
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,没有被列入标准的C++库。我试图添加这些lib标志到以下命令,但无济于事:
cpp.o: FooRenderer/FooRenderer/FooLibrary.cpp
clang++ -c --std=c++14 -lstdc++ -lc++ -stdlib=libstdc++ -o [email protected] $^
我错过了什么?
您是否尝试过明确指定要使用的SDK,以及最小和最大操作系统版本? Xcode做那些。您可能想要使用Xcode进行构建,并通过将报告导航器中的条目取消折叠来查看它通过的内容(每行显示的条目右侧都有一个不可见的图标)。 – uliwitness
(对于链接器警告,我的意思是) – uliwitness