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diff --git a/docs/C++-Standard-Libraries.md b/docs/C++-Standard-Libraries.md new file mode 100644 index 000000000..0bb987def --- /dev/null +++ b/docs/C++-Standard-Libraries.md @@ -0,0 +1,23 @@ +# C++ Standard Libraries +There are two C++ standard libraries supported by Apple compilers. + +The default for 10.8 and earlier is **libstdc++**, supported by Apple GCC +compilers, GNU GCC compilers, and clang. This was marked deprecated with a +warning during compile as of Xcode 8. + +The default for 10.9 is **libc++**, which is also the default for clang on older +platforms when building C++11 code. + +There are subtle incompatibilities between several of the C++ standard libraries, +so Homebrew will refuse to install software if a dependency was built with an +incompatible C++ library. It's recommended that you install the dependency tree +using a compatible compiler. + +**If you've upgraded to 10.9 from an earlier version** - because the default C++ +standard library is now libc++, you may not be able to build software using +dependencies that you built on 10.8 or lower. If you're reading this page because +you were directed here by a build error, you can most likely fix the issue if +you reinstall all the dependencies of the package you're trying to build. + +Example install using GCC 4.8: ```brew install DESIRED_FORMULA --cc=gcc-4.8```. +Get GCC 4.8 via: ```brew install gcc48``` |