ruby-on-rails – 在Ruby 2.4.2上安装带有本机扩展的ffi 1.9.21,

sudo apt install libffi-dev
gem inst ffi

部署到AWS时会发生此错误.错误看起来像这样.

Installing dotenv 2.2.1
Installing request_store 1.3.2
Installing draper 3.0.1

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

/opt/rubies/ruby-2.2.3/bin/ruby -r ./siteconf20180207-2245-1bjhja4.rb extconf.rb
checking for ffi.h... no
checking for ffi.h in /usr/local/include,/usr/include/ffi... no
checking for shlwapi.h... no
checking for rb_thread_blocking_region()... no
checking for rb_thread_call_with_gvl()... yes
checking for rb_thread_call_without_gvl()... yes
creating extconf.h
creating Makefile

  make "DESTDIR=" clean

make "DESTDIR="
Running autoreconf for libffi
/var/app/ondeck/vendor/bundle/gems/ffi-1.9.21/ext/ffi_c/libffi/autogen.sh: line 2: exec: autoreconf: not found
make: *** ["/var/app/ondeck/vendor/bundle/gems/ffi-1.9.21/ext/ffi_c/libffi-x86_64-linux"/.libs/libffi_convenience.a] Error 127

make failed,exit code 2

Gem files will remain installed in /var/app/ondeck/vendor/bundle/gems/ffi-1.9.21 for inspection.
Results logged to /var/app/ondeck/vendor/bundle/extensions/x86_64-linux/2.2.0-static/ffi-1.9.21/gem_make.out
An error occurred while installing ffi (1.9.21),and Bundler cannot continue.
Make sure that `gem install ffi -v '1.9.21'` succeeds before bundling. (Executor::NonZeroExitStatus)

任何帮助都会很有帮助.提前致谢.