[RUBY] Eine Geschichte darüber, dass die Installation aufgrund von gem'ffi 'plötzlich nicht mehr gebündelt werden kann.

Wie der Titel schon sagt. Plötzlich funktionierte die Bundle-Installation nicht mehr.

Rails wurde nicht angedockt und in der lokalen Umgebung von Mac entwickelt.

Umgebung

macOS Catalina 10.15.7
Rails 5.2.1
Ruby 2.4.2
bundler 1.17.1

Fazit

Ich habe die Version von Xcode, die ich auf meinem Mac installiert hatte, gesenkt und sie ist bestanden.

Fehlermeldung

$ bundle install
.
.
.
Fetching ffi 1.9.23
Installing ffi 1.9.23 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
    current directory: /Users/shimazu/vendor/bundle/ruby/2.5.0/gems/ffi-1.9.23/ext/ffi_c
/Users/shimazu/.rbenv/versions/2.5.0/bin/ruby -I /Users/shimazu/.rbenv/versions/2.5.0/lib/ruby/site_ruby/2.5.0 -r ./siteconf20201102-41899-zc56ao.rb extconf.rb
checking for ffi_call() in -lffi... yes
checking for ffi_closure_alloc()... 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/shimazu/vendor/bundle/ruby/2.5.0/gems/ffi-1.9.23/ext/ffi_c
make "DESTDIR=" clean
current directory: /Users/shimazu/vendor/bundle/ruby/2.5.0/gems/ffi-1.9.23/ext/ffi_c
make "DESTDIR="
compiling AbstractMemory.c
compiling ArrayType.c
compiling Buffer.c
compiling Call.c
Call.c:334:5: error: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    rbffi_thread_blocking_region(call_blocking_function, data, (void *) -1, NULL);
    ^
./Thread.h:78:39: note: expanded from macro 'rbffi_thread_blocking_region'
# define rbffi_thread_blocking_region rb_thread_call_without_gvl
                                      ^
1 error generated.
make: *** [Call.o] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/shimazu/vendor/bundle/ruby/2.5.0/gems/ffi-1.9.23 for inspection.
Results logged to /Users/shimazu/vendor/bundle/ruby/2.5.0/extensions/x86_64-darwin-19/2.5.0/ffi-1.9.23/gem_make.out
An error occurred while installing ffi (1.9.23), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.9.23' --source 'https://rubygems.org/'` succeeds before bundling.
In Gemfile:
  bootstrap was resolved to 4.0.0, which depends on
    sass was resolved to 3.5.5, which depends on
      sass-listen was resolved to 4.0.0, which depends on
        rb-inotify was resolved to 0.9.10, which depends on
          ffi

Ursache

Bei Betrachtung der Fehlermeldung scheint die C-Kompilierung fehlgeschlagen zu sein. .. Ich habe viel versucht, aber es schien an der lokalen Xcode-Version zu liegen.

before

$ xcodebuild -version
Xcode 12.1
Build version 12A7403

$ clang --version
Apple clang version 12.0.0 (clang-1200.0.32.21)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

after

$ xcodebuild -version
Xcode 11.5
Build version 11E608c

$ clang --version
Apple clang version 11.0.3 (clang-1103.0.32.62)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin