无法安装特定的 ffi 版本。如果我运行 gem install ffi，一切正常，但我需要特定版本 1.9.18 并且它不起作用。
Fetching ffi 1.9.18
Installing ffi 1.9.18 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/chille/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/ffi-
1.9.18/ext/ffi_c
/Users/chille/.rbenv/versions/2.6.5/bin/ruby -I
/Users/chille/.rbenv/versions/2.6.5/lib/ruby/2.6.0 -r
./siteconf20200928-22154-72wopi.rb extconf.rb
checking for ffi_call() in -lffi... yes
checking for ffi_prep_closure()... yes
checking for ffi_raw_call()... yes
checking for ffi_prep_raw_closure()... yes
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
checking for ffi_prep_cif_var()... yes
creating extconf.h
creating Makefile
current directory: /Users/chille/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/ffi- …我正在尝试运行，bundle install但在尝试安装 Nokogiri 1.10.3 时出现错误
这是来自 的错误消息mkmf.log。
gcc -o conftest -I/home/chille/.rvm/rubies/ruby-2.5.1/include/ruby-2.5.0/x86_64-linux -I/home/chille/.rvm/rubies/ruby-2.5.1/include/ruby-2$
gcc: error: unrecognized command line option '-Wmisleading-indentation'
gcc: error: unrecognized command line option '-Wimplicit-fallthrough=0'
gcc: error: unrecognized command line option '-Wduplicated-cond'
gcc: error: unrecognized command line option '-Wrestrict'
有没有一种方法可以检测文本选择时的鼠标单击或鼠标向上事件，但在选择文本时实际上会跳过？
https://jsfiddle.net/chille1987/ctm4rd7n/
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