llvm

When to use

Next-gen compiler infrastructure. Use llvm when you want a widely used development command-line package that can be installed and updated through Homebrew. It is one of FastBrew's top packages by Homebrew installs, with about 912.5K installs over the last year.

Dependencies

Build Dependencies

Installation Notes

CLANG_CONFIG_FILE_SYSTEM_DIR: $HOMEBREW_PREFIX/etc/clang
CLANG_CONFIG_FILE_USER_DIR:   ~/.config/clang

LLD is now provided in a separate formula:
  brew install lld

Using `clang`, `clang++`, etc., requires a CLT installation at `/Library/Developer/CommandLineTools`.
If you don't want to install the CLT, you can write appropriate configuration files pointing to your
SDK at ~/.config/clang.

To use the bundled libunwind please use the following LDFLAGS:
  LDFLAGS="-L$HOMEBREW_PREFIX/opt/llvm/lib/unwind -lunwind"

To use the bundled libc++ please use the following LDFLAGS:
  LDFLAGS="-L$HOMEBREW_PREFIX/opt/llvm/lib/c++ -L$HOMEBREW_PREFIX/opt/llvm/lib/unwind -lunwind"
Features newer than system libc++ will require the following define to enable
(support for this may be removed in a future major LLVM release):
  CPPFLAGS="-D_LIBCPP_DISABLE_AVAILABILITY"

NOTE: You probably want to use the libunwind and libc++ provided by macOS unless you know what you're doing.