I'm trying to figure Ruby on Rails in cygwin, and I;ve used the native cygwin installer, however I get this error message when I try
$ gem install rails. I've also tried another route with RailInstaller and but I don't think Cygwin can locate the correct path.
//错误消息 构建本机扩展。这可能需要一段时间... 错误：安装 rails 时出错：错误：无法构建 gem 原生扩展。
/usr/bin/ruby.exe extconf.rb
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/usr/bin/ruby
--with-atomic_reference-dir
--without-atomic_reference-dir
--with-atomic_reference-include
--without-atomic_reference-include=${atomic_reference-dir}/include
--with-atomic_reference-lib
--without-atomic_reference-lib=${atomic_reference-dir}/
/usr/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /usr/lib/ruby/1.9.1/mkmf.rb:461:in `try_link0'
from /usr/lib/ruby/1.9.1/mkmf.rb:712:in `try_run'
from extconf.rb:26:in `<main>'
Gem files will remain installed in /usr/lib/ruby/gems/1.9.1/gems/atomic-1.1.14 for inspection.
Results logged to /usr/lib/ruby/gems/1.9.1/gems/atomic-1.1.14/ext/gem_make.out
//这是makefile文件，会不会是我没有合适的gcc？
"gcc -o conftest -I/usr/include/ruby-1.9.1/x86_64-cygwin -I/usr/include/ruby-1.\
9.1/ruby/backward -I/usr/include/ruby-1.9.1 -I. -ggdb -O2 -pipe -fno-stric\
t-aliasing conftest.c -L. -L/usr/lib -L. -lruby191 -lpthread -lrt -ldl \
-lcrypt "
/usr/lib/gcc/x86_64-pc-cygwin/4.8.1/../../../../x86_64-pc-cygwin/bin/ld: cannot\
find -lcrypt
collect2: error: ld returned 1 exit status
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: int main(int argc, char **argv)
4: {
5: return 0;
6: }
/* end */
**Thanks a bunch!**