Merge pull request #1031 from MikeMcQuaid/rearrange-repo

Rearrange repository

1 files changed, 23 insertions, 0 deletions

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```