我正在尝试在本地计算机上启动Rails项目并运行它。捆绑安装时
Fetching mysql2 0.3.20
Installing mysql2 0.3.20 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-
0.3.20/ext/mysql2
/Users/mac/.rvm/rubies/ruby-2.3.1/bin/ruby -r ./siteconf20180707-33936-1toblx7.rb extconf.rb
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
-----
Using mysql_config at /usr/local/bin/mysql_config
-----
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
-----
Setting rpath to /usr/local/Cellar/mysql/8.0.11/lib
-----
creating Makefile
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20/ext/mysql2
make "DESTDIR="
compiling infile.c
compiling client.c
client.c:367:33: warning: implicit conversion loses integer precision: 'long' to 'unsigned int' [-Wshorten-64-to-32]
elapsed_time = end_time - start_time;
~ ~~~~~~~~~^~~~~~~~~~~~
client.c:439:3: error: use of undeclared identifier 'my_bool'
my_bool res = mysql_read_query_result(client);
^
client.c:441:19: error: use of undeclared identifier 'res'
return (void *)(res == 0 ? Qtrue : Qfalse);
^
client.c:775:3: error: use of undeclared identifier 'my_bool'
my_bool boolval;
^
client.c:806:7: error: use of undeclared identifier 'boolval'
boolval = (value == Qfalse ? 0 : 1);
^
client.c:807:17: error: use of undeclared identifier 'boolval'
retval = &boolval;
^
client.c:810:10: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
case MYSQL_SECURE_AUTH:
^~~~~~~~~~~~~~~~~
MYSQL_DEFAULT_AUTH
/usr/local/Cellar/mysql/8.0.11/include/mysql/mysql.h:188:3: note: 'MYSQL_DEFAULT_AUTH' declared here
MYSQL_DEFAULT_AUTH,
^
client.c:811:7: error: use of undeclared identifier 'boolval'
boolval = (value == Qfalse ? 0 : 1);
^
client.c:812:17: error: use of undeclared identifier 'boolval'
retval = &boolval;
^
client.c:843:38: error: use of undeclared identifier 'boolval'
wrapper->reconnect_enabled = boolval;
^
client.c:1165:56: warning: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32]
mysql2rb = mysql2_mysql_enc_name_to_rb(charset_name, charset_name_len);
~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~
client.c:1198:38: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
return _mysql_client_options(self, MYSQL_SECURE_AUTH, value);
^~~~~~~~~~~~~~~~~
MYSQL_DEFAULT_AUTH
/usr/local/Cellar/mysql/8.0.11/include/mysql/mysql.h:188:3: note: 'MYSQL_DEFAULT_AUTH' declared here
MYSQL_DEFAULT_AUTH,
^
2 warnings and 10 errors generated.
make: *** [client.o] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20 for inspection.
Results logged to /Users/mac/.rvm/gems/ruby-2.3.1/extensions/x86_64-darwin-17/2.3.0/mysql2-0.3.20/gem_make.out
An error occurred while installing mysql2 (0.3.20), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.3.20' --source 'https://rubygems.org/'` succeeds before bundling.
In Gemfile:
mysql2
然后我按照说明进行操作
gem install mysql2 -v '0.3.20' --source 'https://rubygems.org/'
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20/ext/mysql2
/Users/mac/.rvm/rubies/ruby-2.3.1/bin/ruby -r ./siteconf20180707-34132-p3fohi.rb extconf.rb
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
-----
Using mysql_config at /usr/local/bin/mysql_config
-----
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
-----
Setting rpath to /usr/local/Cellar/mysql/8.0.11/lib
-----
creating Makefile
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20/ext/mysql2
make "DESTDIR="
compiling infile.c
compiling client.c
client.c:367:33: warning: implicit conversion loses integer precision: 'long' to 'unsigned int' [-Wshorten-64-to-32]
elapsed_time = end_time - start_time;
~ ~~~~~~~~~^~~~~~~~~~~~
client.c:439:3: error: use of undeclared identifier 'my_bool'
my_bool res = mysql_read_query_result(client);
^
client.c:441:19: error: use of undeclared identifier 'res'
return (void *)(res == 0 ? Qtrue : Qfalse);
^
client.c:775:3: error: use of undeclared identifier 'my_bool'
my_bool boolval;
^
client.c:806:7: error: use of undeclared identifier 'boolval'
boolval = (value == Qfalse ? 0 : 1);
^
client.c:807:17: error: use of undeclared identifier 'boolval'
retval = &boolval;
^
client.c:810:10: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
case MYSQL_SECURE_AUTH:
^~~~~~~~~~~~~~~~~
MYSQL_DEFAULT_AUTH
/usr/local/Cellar/mysql/8.0.11/include/mysql/mysql.h:188:3: note: 'MYSQL_DEFAULT_AUTH' declared here
MYSQL_DEFAULT_AUTH,
^
client.c:811:7: error: use of undeclared identifier 'boolval'
boolval = (value == Qfalse ? 0 : 1);
^
client.c:812:17: error: use of undeclared identifier 'boolval'
retval = &boolval;
^
client.c:843:38: error: use of undeclared identifier 'boolval'
wrapper->reconnect_enabled = boolval;
^
client.c:1165:56: warning: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32]
mysql2rb = mysql2_mysql_enc_name_to_rb(charset_name, charset_name_len);
~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~
client.c:1198:38: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
return _mysql_client_options(self, MYSQL_SECURE_AUTH, value);
^~~~~~~~~~~~~~~~~
MYSQL_DEFAULT_AUTH
/usr/local/Cellar/mysql/8.0.11/include/mysql/mysql.h:188:3: note: 'MYSQL_DEFAULT_AUTH' declared here
MYSQL_DEFAULT_AUTH,
^
2 warnings and 10 errors generated.
make: *** [client.o] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20 for inspection.
Results logged to /Users/mac/.rvm/gems/ruby-2.3.1/extensions/x86_64-darwin-17/2.3.0/mysql2-0.3.20/gem_make.out
我已经尝试过这里提到的解决方案
Ruby gem mysql2 install failing
brew install mysql
Warning: mysql 8.0.11 is already installed and up-to-date
To reinstall 8.0.11, run `brew reinstall mysql`
然后
gem install mysql2
Building native extensions. This could take a while...
Successfully installed mysql2-0.5.2
Parsing documentation for mysql2-0.5.2
Done installing documentation for mysql2 after 0 seconds
1 gem installed
但是当我再次捆绑安装时，我仍然会收到所有这些错误
奇怪的是我跑步
brew reinstall mysql
==> Reinstalling mysql
==> Downloading https://homebrew.bintray.com/bottles/mysql-8.0.11.high_sierra.bottle.tar.gz
Already downloaded: /Users/mac/Library/Caches/Homebrew/mysql-8.0.11.high_sierra.bottle.tar.gz
==> Pouring mysql-8.0.11.high_sierra.bottle.tar.gz
==> /usr/local/Cellar/mysql/8.0.11/bin/mysqld --initialize-insecure --user=mac --basedir=/usr/local/Cellar/mysql/8.0.11 --datadir=/usr/local/var/mysql --tmpdir=/tmp
Last 15 lines from /Users/mac/Library/Logs/Homebrew/mysql/post_install.01.mysqld:
2018-07-07 23:56:01 -0500
/usr/local/Cellar/mysql/8.0.11/bin/mysqld
--initialize-insecure
--user=mac
--basedir=/usr/local/Cellar/mysql/8.0.11
--datadir=/usr/local/var/mysql
--tmpdir=/tmp
2018-07-08T04:56:01.743929Z 0 [System] [MY-013169] [Server] /usr/local/Cellar/mysql/8.0.11/bin/mysqld (mysqld 8.0.11) initializing of server in progress as process 35410
2018-07-08T04:56:01.746039Z 0 [ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting.
2018-07-08T04:56:01.746086Z 0 [ERROR] [MY-010119] [Server] Aborting
2018-07-08T04:56:01.746293Z 0 [System] [MY-010910] [Server] /usr/local/Cellar/mysql/8.0.11/bin/mysqld: Shutdown complete (mysqld 8.0.11) Homebrew.
Warning: The post-install step did not complete successfully
You can try again using `brew postinstall mysql`
==> Caveats
We've installed your MySQL database without a root password. To secure it run:
mysql_secure_installation
MySQL is configured to only allow connections from localhost by default
To connect run:
mysql -uroot
To have launchd start mysql now and restart at login:
brew services start mysql
Or, if you don't want/need a background service you can just run:
mysql.server start
==> Summary
/usr/local/Cellar/mysql/8.0.11: 254 files, 232.6MB
这令人困惑，说实话，我不是100％的理解，这很可能是问题的根源，但不知道。
我已经更新到最新版本的XCode，并安装了开发工具
这是我的gemfile.lock外观
GEM
remote: https://rubygems.org/
specs:
actionmailer (4.2.0)
actionpack (= 4.2.0)
actionview (= 4.2.0)
activejob (= 4.2.0)
mail (~> 2.5, >= 2.5.4)
rails-dom-testing (~> 1.0, >= 1.0.5)
actionpack (4.2.0)
actionview (= 4.2.0)
activesupport (= 4.2.0)
rack (~> 1.6.0)
rack-test (~> 0.6.2)
rails-dom-testing (~> 1.0, >= 1.0.5)
rails-html-sanitizer (~> 1.0, >= 1.0.1)
actionview (4.2.0)
activesupport (= 4.2.0)
builder (~> 3.1)
erubis (~> 2.7.0)
rails-dom-testing (~> 1.0, >= 1.0.5)
rails-html-sanitizer (~> 1.0, >= 1.0.1)
activejob (4.2.0)
activesupport (= 4.2.0)
globalid (>= 0.3.0)
activemodel (4.2.0)
activesupport (= 4.2.0)
builder (~> 3.1)
activerecord (4.2.0)
activemodel (= 4.2.0)
activesupport (= 4.2.0)
arel (~> 6.0)
activesupport (4.2.0)
i18n (~> 0.7)
json (~> 1.7, >= 1.7.7)
minitest (~> 5.1)
thread_safe (~> 0.3, >= 0.3.4)
tzinfo (~> 1.1)
addressable (2.4.0)
arel (6.0.3)
authority (3.1.0)
activesupport (>= 3.0.0)
rake (>= 0.8.7)
autoprefixer-rails (6.3.6.2)
execjs
aws_cf_signer (0.1.3)
bcrypt (3.1.11)
better_errors (2.1.1)
coderay (>= 1.0.0)
erubis (>= 2.6.6)
rack (>= 0.9.0)
binding_of_caller (0.7.2)
debug_inspector (>= 0.0.1)
bootstrap-sass (3.3.6)
autoprefixer-rails (>= 5.2.1)
sass (>= 3.3.4)
builder (3.2.2)
byebug (9.0.4)
carrierwave (0.11.2)
activemodel (>= 3.2.0)
activesupport (>= 3.2.0)
json (>= 1.7)
mime-types (>= 1.16)
mimemagic (>= 0.3.0)
celluloid (0.16.0)
timers (~> 4.0.0)
chartkick (2.0.0)
ckeditor (4.1.6)
cocaine
orm_adapter (~> 0.5.0)
climate_control (0.0.3)
activesupport (>= 3.0)
cloudinary (1.1.7)
aws_cf_signer
rest-client
cocaine (0.5.8)
climate_control (>= 0.0.3, < 1.0)
coderay (1.1.1)
coffee-rails (4.1.1)
coffee-script (>= 2.2.0)
railties (>= 4.0.0, < 5.1.x)
coffee-script (2.4.1)
coffee-script-source
execjs
coffee-script-source (1.10.0)
concurrent-ruby (1.0.2)
connection_pool (2.2.0)
debug_inspector (0.0.2)
devise (4.1.1)
bcrypt (~> 3.0)
orm_adapter (~> 0.1)
railties (>= 4.1.0, < 5.1)
responders
warden (~> 1.2.3)
dotenv (2.1.1)
dotenv-rails (2.1.1)
dotenv (= 2.1.1)
railties (>= 4.0, < 5.1)
erubis (2.7.0)
execjs (2.7.0)
faraday (0.11.0)
multipart-post (>= 1.2, < 3)
font-awesome-rails (4.6.3.0)
railties (>= 3.2, < 5.1)
friendly_id (5.1.0)
activerecord (>= 4.0.0)
globalid (0.3.6)
activesupport (>= 4.1.0)
groupdate (3.0.0)
activesupport (>= 3)
hashie (3.5.5)
hitimes (1.2.4)
i18n (0.7.0)
ice_cube (0.11.1)
jbuilder (2.4.1)
activesupport (>= 3.0.0, < 5.1)
multi_json (~> 1.2)
jquery-rails (4.1.1)
rails-dom-testing (>= 1, < 3)
railties (>= 4.2.0)
thor (>= 0.14, < 2.0)
jquery-ui-rails (4.2.1)
railties (>= 3.2.16)
json (1.8.3)
jwt (1.5.6)
kaminari (0.16.3)
actionpack (>= 3.0.0)
activesupport (>= 3.0.0)
libv8 (3.16.14.15)
loofah (2.0.3)
nokogiri (>= 1.5.9)
mail (2.6.4)
mime-types (>= 1.16, < 4)
meta-tags (2.1.0)
actionpack (>= 3.0.0)
mime-types (3.1)
mime-types-data (~> 3.2015)
mime-types-data (3.2016.0521)
mimemagic (0.3.1)
mini_magick (4.5.1)
mini_portile2 (2.0.0)
minitest (5.9.0)
multi_json (1.12.1)
multi_xml (0.6.0)
multipart-post (2.0.0)
mysql2 (0.3.20)
newrelic_rpm (3.15.2.317)
nokogiri (1.6.7.2)
mini_portile2 (~> 2.0.0.rc2)
oauth2 (1.3.1)
faraday (>= 0.8, < 0.12)
jwt (~> 1.0)
multi_json (~> 1.3)
multi_xml (~> 0.5)
rack (>= 1.2, < 3)
omniauth (1.6.1)
hashie (>= 3.4.6, < 3.6.0)
rack (>= 1.6.2, < 3)
omniauth-facebook (4.0.0)
omniauth-oauth2 (~> 1.2)
omniauth-oauth2 (1.4.0)
oauth2 (~> 1.0)
omniauth (~> 1.2)
orm_adapter (0.5.0)
polyamorous (1.3.0)
activerecord (>= 3.0)
quiet_assets (1.1.0)
railties (>= 3.1, < 5.0)
rack (1.6.5)
rack-canonical-host (0.2.2)
addressable (> 0, < 3)
rack (>= 1.0.0, < 3)
rack-protection (1.5.3)
rack
rack-test (0.6.3)
rack (>= 1.0)
rails (4.2.0)
actionmailer (= 4.2.0)
actionpack (= 4.2.0)
actionview (= 4.2.0)
activejob (= 4.2.0)
activemodel (= 4.2.0)
activerecord (= 4.2.0)
activesupport (= 4.2.0)
bundler (>= 1.3.0, < 2.0)
railties (= 4.2.0)
sprockets-rails
rails-deprecated_sanitizer (1.0.3)
activesupport (>= 4.2.0.alpha)
rails-dom-testing (1.0.7)
activesupport (>= 4.2.0.beta, < 5.0)
nokogiri (~> 1.6.0)
rails-deprecated_sanitizer (>= 1.0.1)
rails-html-sanitizer (1.0.3)
loofah (~> 2.0)
rails-i18n (4.0.8)
i18n (~> 0.7)
railties (~> 4.0)
rails_12factor (0.0.3)
rails_serve_static_assets
rails_stdout_logging
rails_serve_static_assets (0.0.5)
rails_stdout_logging (0.0.5)
railties (4.2.0)
actionpack (= 4.2.0)
activesupport (= 4.2.0)
rake (>= 0.8.7)
thor (>= 0.18.1, < 2.0)
rake (11.1.2)
ranked-model (0.4.0)
activerecord (>= 3.1.12)
ransack (1.7.0)
actionpack (>= 3.0)
activerecord (>= 3.0)
activesupport (>= 3.0)
i18n
polyamorous (~> 1.2)
rdoc (4.2.2)
json (~> 1.4)
redis (3.3.0)
redis-namespace (1.5.2)
redis (~> 3.0, >= 3.0.4)
ref (2.0.0)
responders (2.2.0)
railties (>= 4.2.0, < 5.1)
rest-client (1.6.7)
mime-types (>= 1.16)
sass (3.4.22)
sass-rails (5.0.4)
railties (>= 4.0.0, < 5.0)
sass (~> 3.1)
sprockets (>= 2.8, < 4.0)
sprockets-rails (>= 2.0, < 4.0)
tilt (>= 1.1, < 3)
sdoc (0.4.1)
json (~> 1.7, >= 1.7.7)
rdoc (~> 4.0)
sidekiq (3.4.2)
celluloid (~> 0.16.0)
connection_pool (~> 2.2, >= 2.2.0)
json (~> 1.0)
redis (~> 3.2, >= 3.2.1)
redis-namespace (~> 1.5, >= 1.5.2)
sidetiq (0.6.3)
celluloid (>= 0.14.1)
ice_cube (= 0.11.1)
sidekiq (>= 3.0.0)
sinatra (1.4.7)
rack (~> 1.5)
rack-protection (~> 1.4)
tilt (>= 1.3, < 3)
slim (3.0.7)
temple (~> 0.7.6)
tilt (>= 1.3.3, < 2.1)
slim-rails (3.0.1)
actionmailer (>= 3.1, < 5.0)
actionpack (>= 3.1, < 5.0)
activesupport (>= 3.1, < 5.0)
railties (>= 3.1, < 5.0)
slim (~> 3.0)
spring (1.7.1)
sprockets (3.6.0)
concurrent-ruby (~> 1.0)
rack (> 1, < 3)
sprockets-rails (3.0.4)
actionpack (>= 4.0)
activesupport (>= 4.0)
sprockets (>= 3.0.0)
temple (0.7.7)
therubyracer (0.12.2)
libv8 (~> 3.16.14.0)
ref
thor (0.19.1)
thread_safe (0.3.5)
tilt (2.0.4)
timers (4.0.4)
hitimes
tzinfo (1.2.2)
thread_safe (~> 0.1)
uglifier (3.0.0)
execjs (>= 0.3.0, < 3)
warden (1.2.6)
rack (>= 1.0)
web-console (2.3.0)
activemodel (>= 4.0)
binding_of_caller (>= 0.7.2)
railties (>= 4.0)
sprockets-rails (>= 2.0, < 4.0)
PLATFORMS
ruby
DEPENDENCIES
authority (~> 3.0)
bcrypt (~> 3.1.7)
better_errors
bootstrap-sass (~> 3.3.6)
byebug
carrierwave
chartkick
ckeditor
cloudinary
coffee-rails (~> 4.1.0)
devise
dotenv-rails
font-awesome-rails
friendly_id
groupdate
jbuilder (~> 2.0)
jquery-rails
jquery-ui-rails (~> 4.2.1)
kaminari (~> 0.15)
meta-tags
mini_magick
mysql2 (~> 0.3.20)
newrelic_rpm
omniauth-facebook
quiet_assets
rack-canonical-host
rails (= 4.2.0)
rails-i18n
rails_12factor
ranked-model
ransack
sass-rails (~> 5.0)
sdoc (~> 0.4.0)
sidekiq (~> 3.4.2)
sidetiq (~> 0.6)
sinatra (>= 1.3.0)
slim-rails
spring
therubyracer
uglifier (>= 1.3.0)
web-console (~> 2.0)
RUBY VERSION
ruby 2.3.1p112
BUNDLED WITH
1.12.5
我还尝试给出更具体的命令，如建议的答案
https://stackoverflow.com/a/32869742/8239783
但是我仍然遇到相同的错误。
gem install mysql2 -v '0.3.20' -- --with-mysql-config=/usr/local/Cellar/mysql/8.0.11/bin/mysql_config
Building native extensions with: '--with-mysql-config=/usr/local/Cellar/mysql/8.0.11/bin/mysql_config'
This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20/ext/mysql2
/Users/mac/.rvm/rubies/ruby-2.3.1/bin/ruby -r ./siteconf20180708-38248-vd681p.rb extconf.rb --with-mysql-config=/usr/local/Cellar/mysql/8.0.11/bin/mysql_config
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
-----
Using mysql_config at /usr/local/Cellar/mysql/8.0.11/bin/mysql_config
-----
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
-----
Setting rpath to /usr/local/Cellar/mysql/8.0.11/lib
-----
creating Makefile
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20/ext/mysql2
make "DESTDIR="
compiling infile.c
compiling client.c
client.c:367:33: warning: implicit conversion loses integer precision: 'long' to 'unsigned int' [-Wshorten-64-to-32]
elapsed_time = end_time - start_time;
~ ~~~~~~~~~^~~~~~~~~~~~
client.c:439:3: error: use of undeclared identifier 'my_bool'
my_bool res = mysql_read_query_result(client);
^
client.c:441:19: error: use of undeclared identifier 'res'
return (void *)(res == 0 ? Qtrue : Qfalse);
^
client.c:775:3: error: use of undeclared identifier 'my_bool'
my_bool boolval;
^
client.c:806:7: error: use of undeclared identifier 'boolval'
boolval = (value == Qfalse ? 0 : 1);
^
client.c:807:17: error: use of undeclared identifier 'boolval'
retval = &boolval;
^
client.c:810:10: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
case MYSQL_SECURE_AUTH:
^~~~~~~~~~~~~~~~~
MYSQL_DEFAULT_AUTH
/usr/local/Cellar/mysql/8.0.11/include/mysql/mysql.h:188:3: note: 'MYSQL_DEFAULT_AUTH' declared here
MYSQL_DEFAULT_AUTH,
^
client.c:811:7: error: use of undeclared identifier 'boolval'
boolval = (value == Qfalse ? 0 : 1);
^
client.c:812:17: error: use of undeclared identifier 'boolval'
retval = &boolval;
^
client.c:843:38: error: use of undeclared identifier 'boolval'
wrapper->reconnect_enabled = boolval;
^
client.c:1165:56: warning: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32]
mysql2rb = mysql2_mysql_enc_name_to_rb(charset_name, charset_name_len);
~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~
client.c:1198:38: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
return _mysql_client_options(self, MYSQL_SECURE_AUTH, value);
^~~~~~~~~~~~~~~~~
MYSQL_DEFAULT_AUTH
/usr/local/Cellar/mysql/8.0.11/include/mysql/mysql.h:188:3: note: 'MYSQL_DEFAULT_AUTH' declared here
MYSQL_DEFAULT_AUTH,
^
2 warnings and 10 errors generated.
make: *** [client.o] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/mac/.rvm/gems/ruby-2.3.1/gems/mysql2-0.3.20 for inspection.
Results logged to /Users/mac/.rvm/gems/ruby-2.3.1/extensions/x86_64-darwin-17/2.3.0/mysql2-0.3.20/gem_make.out
这是我的mysql_config文件的日志
mysql_config
Usage: /usr/local/bin/mysql_config [OPTIONS]
Compiler: Clang 9.1.0.9020039
Options:
--cflags [-I/usr/local/Cellar/mysql/8.0.11/include/mysql ]
--cxxflags [-I/usr/local/Cellar/mysql/8.0.11/include/mysql ]
--include [-I/usr/local/Cellar/mysql/8.0.11/include/mysql]
--libs [-L/usr/local/Cellar/mysql/8.0.11/lib -lmysqlclient -lssl -lcrypto]
--libs_r [-L/usr/local/Cellar/mysql/8.0.11/lib -lmysqlclient -lssl -lcrypto]
--plugindir [/usr/local/Cellar/mysql/8.0.11/lib/plugin]
--socket [/tmp/mysql.sock]
--port [0]
--version [8.0.11]
--variable=VAR VAR is one of:
pkgincludedir [/usr/local/Cellar/mysql/8.0.11/include/mysql]
pkglibdir [/usr/local/Cellar/mysql/8.0.11/lib]
plugindir [/usr/local/Cellar/mysql/8.0.11/lib/plugin]
我正在使用Mac High Sierra 10.13.4
我很乐意得到任何建议，因为它使我发疯。请让我知道我可以提供的其他信息，以提出更好的问题。
提前谢谢
答案 0 :(得分：24)
我今天刚遇到这个问题。 mysql最近更新了，所以对我有用的是：
brew install mysql@5.6
brew link mysql@5.6 --force
bundle install
或者，我没有尝试这种解决方案，但是它似乎对其他人有用。
答案 1 :(得分：8)
在Mac pro上安装mysql2-0.3.21时，我遇到了同样的问题。
以下提到的解决方案对我有用（在终端中运行以下提到的3个命令，指向您的项目文件夹）：
brew install mysql
gem install mysql2 -v '0.3.21' -- --srcdir=/usr/local/mysql/include
bundle install
答案 2 :(得分：5)
这对我有用- macOS Catalina
brew uninstall mysql
gem uninstall mysql2
brew install mysql@5.7
brew link mysql@5.7 --force
gem install mysql2 -v '0.3.21'
# Gemfile
gem 'mysql2', '0.3.21'
bundle update mysql2
答案 3 :(得分：0)
我的MacBook Pro在升级到MacOS Mojave期间磁盘崩溃（不漂亮！），因此之后我必须重新建立我的所有代码项目。
事实证明，一个特定的项目很难启动和运行，并且我今天已经花了几个小时来寻找一种方法来使较旧的RoR项目运行mysql2-0.3.21。带有Rails 4.1.1的Ruby 2.1.1p76版本。
最后，我遵循了以下建议：https://github.com/brianmario/mysql2/issues/1010#issuecomment-460257986
我执行了以下步骤：
首先从您的gemset删除所有已安装的mysql2版本：
gem uninstall mysql2
然后安装MySQL 5.6，我已经安装了MySQL 8.0.17，因此5.6仅作为小桶安装，这很好：
brew install mysql@5.6
然后使用以下命令安装mysql2版本0.3.21：
gem install mysql2 -v 0.3.21 -- --with-mysql-config=/usr/local/Cellar/mysql@5.6/5.6.42/bin/mysql_config --with-ldflags=-L/usr/local/opt/openssl/lib --with-cppflags=-I/usr/local/opt/openssl/include
OpenSSL部分可能被遗漏了，您可以根据项目运行的Rails版本来更改mysql2版本号。
完成上述步骤后，我能够再次启动Rails控制台并查询数据库：
Loading development environment (Rails 4.1.1)
2.1.1 :001 > User.count
(18.7ms) SELECT COUNT(*) FROM `users` WHERE `users`.`deleted_at` IS NULL
=> 1222
2.1.1 :002 >
答案 4 :(得分：0)
截至今天，Homebrew 默认使用 MySQL 8.0、OpenSSL 1.1 和 mysql2 0.5，它们开箱即用。但是，要将旧应用程序从 Rails 3.2 升级到更新版本，我必须在 MacOS BigSur 11.1 上设置本地环境。
我的目标是安装 mysql2 gem 版本 0.3.x（这只是一个允许从 Rails 3.2 通过版本 4.0 和 4.1 平滑迁移到 Rails 4.2）和 mySQL 5.x。两者依次依赖于 OpenSSL 1.0
这对我有用：
// Clean-up all your faulty attempts you did before
// Homebrew does not store openssl 1.0 anymore, so I had to find alternative — openssl1.0.2t
wget https://github.com/tebelorg/Tump/releases/download/v1.0.0/openssl.rb
brew install openssl.rb
brew install mysql@5.7
brew link mysql@5.7 --force
brew install mysql-client@5.7
// NB! Pay close attention to path where you have mysql_config and openssl 1.0 installed
gem install mysql2 -v 0.3.21 -- --with-mysql-config=/usr/local/bin/mysql_config --with-ldflags=-L/usr/local/Cellar/openssl/1.0.2t/lib --with-cppflags=-I/usr/local/Cellar/openssl/1.0.2t/include
瞧：
Building native extensions with: '--with-mysql-config=/usr/local/bin/mysql_config --with-ldflags=-L/usr/local/Cellar/openssl/1.0.2t/lib --with-cppflags=-I/usr/local/Cellar/openssl/1.0.2t/include'
This could take a while...
Successfully installed mysql2-0.3.21
Parsing documentation for mysql2-0.3.21
Installing ri documentation for mysql2-0.3.21
Done installing documentation for mysql2 after 0 seconds
1 gem installed