170c5493a4
- Add some `odeprecated` - Make some `odeprecated` now `odisabled` - Remove `odisabled` code. - Remove old update migrations - Remove GCC 4.0 compiler - Remove Tiger-only code - Remove 32-bit-only code - Remove use of LD64 - Remove GCC 4.3 - 4.8 support.
29 lines
1.2 KiB
Markdown
29 lines
1.2 KiB
Markdown
# C++ Standard Libraries
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There are two C++ standard libraries supported by Apple compilers.
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The default for 10.9 and later is **libc++**, which is also the default for `clang` on older
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platforms when building C++11 code.
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The default for 10.8 and earlier was **libstdc++**, supported by Apple GCC
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compilers, GNU GCC compilers, and `clang`. This was marked deprecated with a
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warning during compilation as of Xcode 8.
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There are subtle incompatibilities between several of the C++ standard libraries,
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so Homebrew will refuse to install software if a dependency was built with an
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incompatible C++ library. It's recommended that you install the dependency tree
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using a compatible compiler.
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**If you've upgraded to 10.9 or later from an earlier version:** Because the default C++
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standard library is now libc++, you may not be able to build software using
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dependencies that you built on 10.8 or earlier. If you're reading this page because
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you were directed here by a build error, you can most likely fix the issue if
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you reinstall all the dependencies of the package you're trying to build.
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Example install using GCC 7:
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```sh
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brew install gcc@7
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brew install --cc=gcc-7 <formula>
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```
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