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我正在嘗試關注http://gnuu.org/2009/09/18/writing-your-own-toy-compiler教程。我收到以下錯誤。ld:未找到架構x86_64錯誤的符號
我錯過了什麼?
Invoking: GCC C++ Compiler
g++ -std=c++0x -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -I/usr/local/opt/llvm/include -O0 -g3 -fPIC -fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wnon-virtual-dtor -std=c++11 -fPIC -MMD -MP -MF"src/main.d" -MT"src/main.o" -o "src/main.o" "../src/main.cpp"
In file included from ../src/main.cpp:2:
../src/node.h:17:61: warning: control reaches end of non-void function [-Wreturn-type]
virtual llvm::Value* codeGen(CodeGenContext& context) { }
^
../src/node.h:63:19: warning: field 'rhs' will be initialized after field 'op' [-Wreorder]
lhs(lhs), rhs(rhs), op(op) { }
^
2 warnings generated.
Undefined symbols for architecture x86_64:
"yyparse()", referenced from:
_main in main-974049.o
"_programBlock", referenced from:
_main in main-974049.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [src/main.o] Error 1
請張貼您的代碼。 – SurvivalMachine
「我錯過了什麼?」看起來像一個'return'語句。 – user4581301
在較少的狙擊手陣線上,無論您如何訂購成員初始值設定項列表,都會按聲明順序初始化成員。這可能是也可能不是問題,但是如果你有'memberB(42),memberA(memberB.stuff)'和'memberA'是在類中聲明的,'memberA'將會初始化爲未初始化的'MemberB'。不好的東西。 – user4581301