c++ - G++ & Clang++ - 命名空间 std _GLIBCXX_VISIBILITY(默认)

Question

我正在尝试使用 clang++ 编译我的 C++ 代码，但不断收到与 namespace 冲突的错误。我的 main.cpp 文件是一个简单的 Hello World 程序(用于调试)。

我感觉问题出在我在集群上编译的 GCC 或 clang 版本上。关于如何追查这个问题的任何想法？或故障排除步骤？

[aebrenne@hpc src]$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/data/apps/gcc/4.8.1/libexec/gcc/x86_64-unknown-linux-gnu/4.8.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ./configure --with-gmp=/data/apps/gmp/5.1.2 --with-mpfr=/data/apps/mpfr/3.1.2 --with-mpc=/data/apps/mpc-1.0.1 --enable-threads=posix --with-as=/data/apps/binutils/2.23.2/bin/as --mandir=/data/apps/gcc/4.8.1/man --pdfdir=/data/apps/gcc/4.8.1/pdf --htmldir=/data/apps/gcc/4.8.1/html --enable-languages=c,c++,fortran,ada,go,java,lto,objc,obj-c++ --prefix=/data/apps/gcc/4.8.1
Thread model: posix
gcc version 4.8.1 (GCC) 

[aebrenne@hpc src]$ clang++ --version
clang version 3.4 (trunk 193367)
Target: x86_64-unknown-linux-gnu
Thread model: posix
[aebrenne@hpc src]$ 


[aebrenne@hpc src]$ cat main.cpp 
#include <iostream>

int main() {
    std::cout << "Starting test..." << std::endl;

    return 0;
}
[aebrenne@hpc src]$ clang++ -std=c++11 -Wall -g -I/data/apps/gcc/4.8.1/include/c++/4.8.1  main.cpp 
In file included from main.cpp:1:
In file included from /data/apps/gcc/4.8.1/include/c++/4.8.1/iostream:39:
In file included from /data/apps/gcc/4.8.1/include/c++/4.8.1/ostream:38:
In file included from /data/apps/gcc/4.8.1/include/c++/4.8.1/ios:38:
In file included from /data/apps/gcc/4.8.1/include/c++/4.8.1/iosfwd:39:
In file included from /data/apps/gcc/4.8.1/include/c++/4.8.1/bits/stringfwd.h:40:
/data/apps/gcc/4.8.1/include/c++/4.8.1/bits/memoryfwd.h:50:15: error: expected '{'
namespace std _GLIBCXX_VISIBILITY(default)
              ^
/data/apps/gcc/4.8.1/include/c++/4.8.1/bits/memoryfwd.h:50:15: error: C++ requires a type specifier for all declarations
namespace std _GLIBCXX_VISIBILITY(default)
              ^~~~~~~~~~~~~~~~~~~
/data/apps/gcc/4.8.1/include/c++/4.8.1/bits/memoryfwd.h:50:35: error: expected expression
namespace std _GLIBCXX_VISIBILITY(default)
                                  ^
/data/apps/gcc/4.8.1/include/c++/4.8.1/bits/memoryfwd.h:50:43: error: expected ';' after top level declarator
namespace std _GLIBCXX_VISIBILITY(default)
                                          ^

Answer 1

因为这是按照以下方式搜索的第一个结果:

error: expected unqualified-id before 'namespace'
namespace std _GLIBCXX_VISIBILITY(default)

我承认，我是因为在回溯中提到的头文件中缺少一个右大括号而导致此错误的。

希望这对某人有帮助。