ruby-2.4.0-preview1 - #removing src/ruby-2.4.0-preview1 - please wait
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.12/x86_64/ruby-2.4.0-preview1.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for osx.
Certificates in '/usr/local/etc/openssl/cert.pem' are already up to date.
Requirements installation successful.
Installing Ruby from source to: /Users/jason/.rvm/rubies/ruby-2.4.0-preview1, this may take a while depending on your cpu(s)...
ruby-2.4.0-preview1 - #downloading ruby-2.4.0-preview1, this may take a while depending on your connection...
ruby-2.4.0-preview1 - #extracting ruby-2.4.0-preview1 to /Users/jason/.rvm/src/ruby-2.4.0-preview1 - please wait
ruby-2.4.0-preview1 - #configuring - please wait
ruby-2.4.0-preview1 - #post-configuration - please wait
ruby-2.4.0-preview1 - #compiling - please wait
Error running '__rvm_make -j 1',
showing last 15 lines of /Users/jason/.rvm/log/1466474295_ruby-2.4.0-preview1/make.log
compiling safe.c
compiling signal.c
compiling sprintf.c
compiling st.c
compiling strftime.c
compiling string.c
compiling struct.c
compiling symbol.c
compiling thread.c
thread.c:1088:27: error: implicit conversion loses integer precision: 'long' to '__darwin_suseconds_t' (aka 'int') [-Werror,-Wshorten-64-to-32]
        tp->tv_usec = ts.tv_nsec / 1000;
                    ~ ~~~~~~~~~~~^~~~~~
1 error generated.
make: *** [thread.o] Error 1
+__rvm_make:0> return 2
There has been an error wh

额，macOS 10.12 Beta 下面编译不过

#2 楼 @huacnlee 升级了一次 10.11 之后就不敢随便升级了，到现在还是 10.10 不知道什么时候能发布 3.0 啊

@huacnlee

删掉 Makefile 中的 -Werror=shorten-64-to-32 , 然后 make install 试试？

#4 楼 @luikore 编译过了

和 Rails 5 冲突https://github.com/rails/rails/issues/25185

刚测了下，2.4.0preview1 和 rails5 rc2 配合好像没什么问题。