7

我不知道如何告诉 scons 接受 c++11 标准：

SConstruct 文件：

env=Environment(CPPPATH='/usr/include/boost/',
                CPPDEFINES=[],
                LIBS=[],
                SCONS_CXX_STANDARD="c++11"
                )

env.Program('Hello', Glob('src/*.cpp'))

cpp文件：

#include <iostream>
class A{};
int main()
{
  std::cout << "hello world!" << std::endl;
  auto test = new A; // testing auto C++11 keyword
  if( test == nullptr ){std::cout << "hey hey" << std::endl;} // testing nullptr keyword
  else{std::cout << " the pointer is not null" << std::endl;}
  return 0;
};

调用 scons 时的错误消息：

scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
g++ -o src/hello_world.o -c -I/usr/include/boost src/hello_world.cpp
src/hello_world.cpp: In function 'int main()':
src/hello_world.cpp:13:8: error: 'test' does not name a type
src/hello_world.cpp:15:7: error: 'test' was not declared in this scope
src/hello_world.cpp:15:15: error: 'nullptr' was not declared in this scope
scons: *** [src/hello_world.o] Error 1
scons: building terminated because of errors.

显然它不明白auto并且nullptr

4

1 回答 1

13

我不确定SCONS_CXX_STANDARDSCons 是否支持。

相反，如果您使用的是 GCC 4.7 或更高版本，请尝试-std=c++11按如下方式传递给编译器：

env=Environment(CPPPATH='/usr/include/boost/',
                CPPDEFINES=[],
                LIBS=[],
                CXXFLAGS="-std=c++0x"
                )

如本问题所述，您可能需要-gnu++11

于 2012-11-01T14:43:14.193 回答