Question

我在MAN中找到了这个：

   -std=language
       Specify the language standard to compile for.

   -ansi
       Same as -std=c89.

但是我的安装编译器在哪里可以找到所有支持标准的列表？

clang -std=??? test.c

Answer 1

检查此文件： llvm.git / tools / clang / include / clang / Frontend / LangStandards.def
online version from github
编译器支持的标准是不断更改，您可以检查此文件并自行尝试。

// C++ modes
LANGSTANDARD(cxx98, "c++98",
             "ISO C++ 1998 with amendments",
             LineComment | CPlusPlus | Digraphs)
LANGSTANDARD(cxx03, "c++03",
             "ISO C++ 1998 with amendments",
             LineComment | CPlusPlus | Digraphs)
LANGSTANDARD(gnucxx98, "gnu++98",
             "ISO C++ 1998 with amendments and GNU extensions",
             LineComment | CPlusPlus | Digraphs | GNUMode)

LANGSTANDARD(cxx0x, "c++0x",
             "ISO C++ 2011 with amendments",
             LineComment | CPlusPlus | CPlusPlus11 | Digraphs)
LANGSTANDARD(cxx11, "c++11",
             "ISO C++ 2011 with amendments",
             LineComment | CPlusPlus | CPlusPlus11 | Digraphs)
LANGSTANDARD(gnucxx0x, "gnu++0x",
             "ISO C++ 2011 with amendments and GNU extensions",
             LineComment | CPlusPlus | CPlusPlus11 | Digraphs | GNUMode)
LANGSTANDARD(gnucxx11, "gnu++11",
             "ISO C++ 2011 with amendments and GNU extensions",
             LineComment | CPlusPlus | CPlusPlus11 | Digraphs | GNUMode)

Answer 2

只需指定任何BS标准，并且clang将打印那些可接受的标准：

c:\LLVM\bin>clang++.exe -std=blabla main.cpp
error: invalid value 'blabla' in '-std=blabla'
note: use 'c++98' or 'c++03' for 'ISO C++ 1998 with amendments' standard
note: use 'gnu++98' or 'gnu++03' for 'ISO C++ 1998 with amendments and GNU extensions' standard
note: use 'c++11' for 'ISO C++ 2011 with amendments' standard
note: use 'gnu++11' for 'ISO C++ 2011 with amendments and GNU extensions' standard
note: use 'c++14' for 'ISO C++ 2014 with amendments' standard
note: use 'gnu++14' for 'ISO C++ 2014 with amendments and GNU extensions' standard
note: use 'c++17' for 'ISO C++ 2017 with amendments' standard
note: use 'gnu++17' for 'ISO C++ 2017 with amendments and GNU extensions' standard
note: use 'c++2a' for 'Working draft for ISO C++ 2020' standard
note: use 'gnu++2a' for 'Working draft for ISO C++ 2020 with GNU extensions' standard

- ）

Answer 3

https://github.com/llvm-mirror/clang/commit/6b15b6d3c1f8274162d5881b05d79aeddd5d6aad

如果用户没有为-std选项提供有效的标准名称，将报告可用值（简短描述）。

如何获得Clang支持的标准列表？

3 个答案: