gistfile1.txt

## OS X
You'll need Xcode and Homebrew for some of the extra packages that are needed to build everything. Otherwise things are much the same as on the Linux side -- hopefully. Adapt paths as necessary.
Externals-clasp and modifying bdw-gc are no longer necessary, as the issues have been worked around in clasp.
`LDFLAGS=-lffi` is necessary when using a Homebrew-provided LLVM due to a longstanding issue in `llvm-config`.

### Clasp itself
0. `brew install llvm@5 gmp bdw-gc boost libunwind-headers`
1. `git clone https://github.com/clasp-developers/clasp ~/clasp`
2. `cd ~/clasp && echo "LLVM_CONFIG_BINARY = '/usr/local/opt/llvm@5/bin/llvm-config'" > wscript.config`
3. `LDFLAGS=-lffi ./waf configure`
4. `LDFLAGS=-lffi ./waf build_cboehm`

If there are still problems - try reinstalling Xcode command line tools and start again.

Use:     `xcode-select --install`