forked from OSchip/llvm-project
4289f4cecf
Provide two new CMake cache variables -- CLANG_DEFAULT_STD_C and CLANG_DEFAULT_STD_CXX -- that can be used to override the default C/ObjC and C++/ObjC++ standards appropriately. They can be set to one of the identifiers from LangStandards.def, or left unset (the default) to respect the current platform default. This option is mostly intended for compiler vendors that may wish to adjust the defaults their compilers are using. For example, Gentoo planned to use it to set clang and gcc to matching standards, so that we could maintain as much compatibility between different compilers as possible. The code relies on explicit identifiers rather than the string aliases for simplicity. This saves us from the necessity of parsing aliases at build-time or adding additional processing at runtime. For the latter case, it also adds trivial value check -- if incorrect value is passed, the code simply fails to compile through referencing an undefined constant. If the variable is used to redefine the default standard, the explicit value overrides the special case for PS4. It is done this way mostly following other kinds of variables where 'platform defaults' are redefined. Differential Revision: https://reviews.llvm.org/D34365 llvm-svn: 326836 |
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| .. | ||
| INPUTS | ||
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| runtime | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .arcconfig | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| INSTALL.txt | ||
| LICENSE.TXT | ||
| ModuleInfo.txt | ||
| NOTES.txt | ||
| README.txt | ||
README.txt
//===----------------------------------------------------------------------===// // C Language Family Front-end //===----------------------------------------------------------------------===// Welcome to Clang. This is a compiler front-end for the C family of languages (C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM compiler infrastructure project. Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer. If you're interested in more (including how to build Clang) it is best to read the relevant web sites. Here are some pointers: Information on Clang: http://clang.llvm.org/ Building and using Clang: http://clang.llvm.org/get_started.html Clang Static Analyzer: http://clang-analyzer.llvm.org/ Information on the LLVM project: http://llvm.org/ If you have questions or comments about Clang, a great place to discuss them is on the Clang development mailing list: http://lists.llvm.org/mailman/listinfo/cfe-dev If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/