gistfile1.txt

~/.r/c/truffleruby-1.0.0-rc6-macos-amd64 (master) > rbenv install truffleruby-1.0.0-rc6 
ruby-build: use openssl from homebrew
Installing truffleruby-1.0.0-rc6...
Compiling the OpenSSL C extension
/Users/hsbt/.rbenv/versions/truffleruby-1.0.0-rc6/lib/mri/mkmf.rb:468:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.

	from /Users/hsbt/.rbenv/versions/truffleruby-1.0.0-rc6/lib/mri/mkmf.rb:584:in `block in try_compile'
	from /Users/hsbt/.rbenv/versions/truffleruby-1.0.0-rc6/lib/mri/mkmf.rb:537:in `with_werror'
	from /Users/hsbt/.rbenv/versions/truffleruby-1.0.0-rc6/lib/mri/mkmf.rb:584:in `try_compile'
	from /Users/hsbt/.rbenv/versions/truffleruby-1.0.0-rc6/src/main/c/openssl/deprecation.rb:5:in `deprecated_warning_flag'
	from extconf.rb:25:in `<main>'

BUILD FAILED (OS X 10.14 using ruby-build 20180822-8-g336584c)

Inspect or clean up the working tree at /var/folders/jl/zgy9fk353nd6zn0xznlsdzvc6gxzs5/T/ruby-build.20180904205617.61332
Results logged to /var/folders/jl/zgy9fk353nd6zn0xznlsdzvc6gxzs5/T/ruby-build.20180904205617.61332.log

Last 10 log lines:
/var/folders/jl/zgy9fk353nd6zn0xznlsdzvc6gxzs5/T/ruby-build.20180904205617.61332 ~/.rbenv/cache/truffleruby-1.0.0-rc6-macos-amd64
/var/folders/jl/zgy9fk353nd6zn0xznlsdzvc6gxzs5/T/ruby-build.20180904205617.61332/truffleruby-1.0.0-rc6 /var/folders/jl/zgy9fk353nd6zn0xznlsdzvc6gxzs5/T/ruby-build.20180904205617.61332 ~/.rbenv/cache/truffleruby-1.0.0-rc6-macos-amd64