Question

为什么clang ++会编译它：

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv) {
    printf("Hello World!\n");
    return EXIT_SUCCESS;
}

并且不想编译它：

#include <iostream>
int main()
{
    std::cout << "FFFF\n";
    return 0;
}
???

命令行：

clang ++ -c hello.cpp -emit-llvm -o hello.bc

发出的错误太多了：

C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\INCLUDE\xrefwrap:222:22:
note:
      expanded from macro '_CLASS_RESULT_OF_PMF_OPT_0X'
                        __thiscall, X2, X3, X4)

Windows 7 64，clang-3.2，llvm-3.2，VS2012

===== UPDATE =====

命令行（使用-v）：

clang++ -c hello.cpp -emit-llvm -o hello.bc -v

我得到了什么：

clang version 3.2 (tags/RELEASE_32/final)
Target: i686-pc-win32
Thread model: posix
 "C:/llvm/clang/build/bin/Debug/clang++.exe" -cc1 -triple i686-pc-win32 -emit-ll
vm-bc -disable-free -main-file-name 321.cpp -mrelocation-model static -mdisable-
fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -target-cpu pentium4 -m
omit-leaf-frame-pointer -v -coverage-file "C:\llvm\3211.bc" -resource-dir "C:/
llvm/clang/build/bin/Debug\..\lib\clang\3.2" -fmodule-cache-path "C:\Users\
\kpdev\AppData\Local\Temp\clang-module-cache" -internal-isystem C:/llvm/clan
g/build/bin/Debug/../lib/clang/3.2/include -internal-isystem "C:\Program Files
(x86)\Microsoft Visual Studio 11.0\VC\include" -internal-isystem "C:\Program
 Files (x86)\Windows Kits\8.0\\include" -std=c++11 -fdeprecated-macro -ferro
r-limit 3 -fmessage-length 80 -mstackrealign -fms-extensions -fms-compatibility
-fmsc-version=1300 -fdelayed-template-parsing -fobjc-runtime=gcc -fobjc-default-
synthesize-properties -fcxx-exceptions -fexceptions -fdiagnostics-show-option -f
color-diagnostics -o "C:\llvm\3211.bc" -x c++ "C:\llvm\321.cpp"
clang -cc1 version 3.2 based upon LLVM 3.2svn default target i686-pc-win32
    #include "..." search starts here:
    #include <...>search starts here:
 C:/llvm/clang/build/bin/Debug/../lib/clang/3.2/include
 C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include
 C:\Program Files (x86)\Windows Kits\8.0\include
End of search list.
In file included from C:\llvm\321.cpp:1:
In file included from C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\inc
lude\iostream:6:
In file included from C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\inc
lude\istream:6:

...等

然后：

C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\type_traits:1072:
33: error:
      '_Ty' does not refer to a value
                _HAS_TRIVIAL_MOVE_CONSTRUCTOR(_Ty)
                                              ^
C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include\type_traits:52:38
: note:
      expanded from macro '_HAS_TRIVIAL_MOVE_CONSTRUCTOR'
                        && __has_trivial_move_constructor(_Ty)>
                                                          ^

...等

所以... -internal-isystem指向错误的路径。如何改变？

Answer 1

您为clang配置了错误的包含路径。这样：

C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\INCLUDE\xrefwrap

是来自VS 2012安装的头文件，并且与clang有关（并且显然与它不兼容）。

确保没有为VC ++编译设置环境。例如，确保没有为VC ++设置的INCLUDE环境变量。可能还有其他env变量，以确保不会为clang设置不当，例如LIB。

为什么Clang ++不能在Windows上用<header>编译代码？</header>

1 个答案: