编辑：如果您想逐步完成所有步骤，我会在这里的博客上写出更详细的解决方案。
我正在尝试gem install Jekyll使用Ruby通过homebrew安装并在macOS Catalina上通过Jekyll安装，并且遇到/usr/local/opt/ruby/bin/ruby以下错误
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory:
/Users/foobar/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/ffi-1.9.21/ext/ffi_c
/Users/foobar/.rbenv/versions/2.5.1/bin/ruby -r ./siteconf20181118-49440-k8mjki.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
current directory:
/Users/foobar/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/ffi-1.9.21/ext/ffi_c
make "DESTDIR=" clean
current directory:
/Users/foobar/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/ffi-1.9.21/ext/ffi_c
make "DESTDIR="
Running autoreconf for libffi
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal -I m4 --output=aclocal.m4t
Can't exec "aclocal": No such file or directory at
/usr/local/Cellar/autoconf/2.69/share/autoconf/Autom4te/FileUtils.pm line 326.
autoreconf: failed to run aclocal: No such file or directory
make: ***
["/Users/foobar/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/ffi-1.9.21/ext/ffi_c/libffi-x86_64-darwin18"/.libs/libffi_convenience.a]
Error 1
make failed, exit code 2
Gem files will remain installed in
/Users/foobar/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/ffi-1.9.21 for inspection.
Results logged to
/Users/foobar/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/extensions/x86_64-darwin-18/2.5.0-static/ffi-1.9.21/gem_make.out
An error occurred while installing ffi (1.9.21), and Bundler cannot continue.
我已经尝试通过更新我的Xcode命令行工具，xcode-select --install但是我得到了以下消息：
xcode-select: error: command line tools are already installed, use "Software Update" to install updates
有谁知道我如何libffi在自己的机器上构建文件，以便杰基尔可以将其用作依赖项？
我知道了！感谢@ffleming在这里。这是您需要做的：
brew reinstall libffiexport LDFLAGS="-L/usr/local/opt/libffi/lib"
export PKG_CONFIG_PATH="/usr/local/opt/libffi/lib/pkgconfig"
gem install jekyll，您应该被分类！本文收集自互联网，转载请注明来源。
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我来说两句