无法在 macOS 上构建 gem 原生扩展

Question

我想运行这个名为 TarSynFlow (https://github.com/seoanezonjic/TarSynFlow) 的工作流。它有一些我正在尝试安装的要求，但遇到了一些问题，特别是安装 scbi_distributed_blast。 TarSynFlow github 页面和原始源 (https://github.com/dariogf/scbi_distributed_blast) 用于输入：

gem install scbi_distributed_blast

试过了，但得到以下结果：

Building native extensions. This could take a while...
ERROR:  Error installing scbi_distributed_blast:
ERROR: Failed to build gem native extension.
current directory: /Users/user_name/.rvm/gems/ruby-3.0.0/gems/eventmachine-1.2.7/ext
/Users/ginamchaput/.rvm/rubies/ruby-3.0.0/bin/ruby -I
/Users/ginamchaput/.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0 -r ./siteconf20210830-52462-idkyvy.rb extconf.rb
checking for -lcrypto... yes
checking for -lssl... yes
checking for openssl/ssl.h... yes
checking for openssl/err.h... yes
checking for rb_trap_immediate in ruby.h,rubysig.h... no
checking for rb_thread_blocking_region()... no
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_fd_select()... yes
checking for rb_fdset_t in ruby/intern.h... yes
checking for rb_wait_for_single_fd()... yes
checking for rb_enable_interrupt()... no
checking for rb_time_new()... yes
checking for inotify_init() in sys/inotify.h... no
checking for __NR_inotify_init in sys/syscall.h... no
checking for writev() in sys/uio.h... yes
checking for pipe2() in unistd.h... no
checking for accept4() in sys/socket.h... no
checking for SOCK_CLOEXEC in sys/socket.h... no
checking for sys/event.h... yes
checking for sys/queue.h... yes
checking for clock_gettime()... yes
checking for CLOCK_MONOTONIC_RAW in time.h... yes
checking for CLOCK_MONOTONIC in time.h... yes
CXXFLAGS= -Wall -Wextra -Wno-deprecated-declarations -Wno-ignored-qualifiers -Wno-unused-result -Wno-address
creating Makefile
current directory: /Users/user_name/.rvm/gems/ruby-3.0.0/gems/eventmachine-1.2.7/ext
make "DESTDIR=" clean
current directory: /Users/user_name/.rvm/gems/ruby-3.0.0/gems/eventmachine-1.2.7/ext
make "DESTDIR="
compiling binder.cpp
In file included from binder.cpp:20:
./project.h:119:10: fatal error: 'openssl/ssl.h' file not found
#include <openssl/ssl.h>
 ^~~~~~~~~~~~~~~
1 error generated.
make: *** [binder.o] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/user_name/.rvm/gems/ruby-3.0.0/gems/eventmachine-1.2.7 for inspection.
Results logged to /Users/user_name/.rvm/gems/ruby-3.0.0/extensions/x86_64-darwin-20/3.0.0/eventmachine-1.2.7/gem_make.out

我确实看到其他帖子建议使用 sudo gem install scbi_distributed_blast ；我确实尝试过，但同样的错误。

我正在使用 macOS Big Sur； XCode v 12.5.1；红宝石（通过 RVM 安装）v 3.0.0p0；如果有人建议安装它，那就太好了！

Answer 1

从这里：

./project.h:119:10: fatal error: 'openssl/ssl.h' file not found

看起来您需要 ssl 开发库来编译 gem。如果您安装了 xcode，请尝试：

xcode-select --install

另一种安装所需库的方法是将homebrew 与：

brew install openssl
brew link openssl --force

---

更新

如果您已安装所有必需的库，请尝试自行安装 eventmachine，但指定 ssl 库所在的路径。

gem install eventmachine -- --with-cppflags=-I/usr/local/opt/openssl/include

然后，再次尝试安装scbi_distributed_blast。