在macOS 10.14安裝Brew更新后,我的開發(fā)系統(tǒng)壞了.

我無法安裝mysql gem.在嘗試安裝時,我得到：

$gem install mysql -v '2.8.1' --source 'http:///'
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
    ERROR: Failed to build gem native extension.

    current directory: /Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/gems/mysql-2.8.1/ext/mysql_api
/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/bin/ruby -r ./siteconf20180926-49343-waujia-0.rb extconf.rb
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... yes
checking for rb_thread_start_timer()... yes
checking for mysql.h... no
checking for mysql/mysql.h... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
    --with-opt-dir
    --without-opt-dir
    --with-opt-include
    --without-opt-include=${opt-dir}/include
    --with-opt-lib
    --without-opt-lib=${opt-dir}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/bin/ruby
    --with-mysql-config
    --without-mysql-config

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/extensions/x86-darwin-14/1.8/mysql-2.8.1/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/gems/mysql-2.8.1 for inspection.
Results logged to /Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/extensions/x86-darwin-14/1.8/mysql-2.8.1/gem_make.out

相對mkmf.log是：

have_func: checking for mysql_ssl_set()... -------------------- yes

"/usr/local/bin/gcc-4.9 -o conftest -I. -I/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.4.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/Cellar/mysql/5.7.21/include/mysql  -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls  -fno-common -pipe -fno-common   conftest.c  -L. -L/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl098/lib    -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -lruby-static -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -ldl -lobjc  "
conftest.c: In function 't':
conftest.c:3:53: error: 'mysql_ssl_set' undeclared (first use in this function)
 int t() { void ((*volatile p)()); p = (void ((*)()))mysql_ssl_set; return 0; }
                                                     ^
conftest.c:3:53: note: each undeclared identifier is reported only once for each function it appears in
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))mysql_ssl_set; return 0; }
/* end */

"/usr/local/bin/gcc-4.9 -o conftest -I. -I/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.4.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/Cellar/mysql/5.7.21/include/mysql  -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls  -fno-common -pipe -fno-common   conftest.c  -L. -L/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl098/lib    -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -lruby-static -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -ldl -lobjc  "
ld: warning: directory not found for option '-L/usr/local/opt/openssl098/lib'
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { mysql_ssl_set(); return 0; }
/* end */

--------------------

have_func: checking for rb_str_set_len()... -------------------- yes

"/usr/local/bin/gcc-4.9 -o conftest -I. -I/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.4.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/Cellar/mysql/5.7.21/include/mysql  -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls  -fno-common -pipe -fno-common   conftest.c  -L. -L/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl098/lib    -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -lruby-static -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -ldl -lobjc  "
conftest.c: In function 't':
conftest.c:3:53: error: 'rb_str_set_len' undeclared (first use in this function)
 int t() { void ((*volatile p)()); p = (void ((*)()))rb_str_set_len; return 0; }
                                                     ^
conftest.c:3:53: note: each undeclared identifier is reported only once for each function it appears in
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))rb_str_set_len; return 0; }
/* end */

"/usr/local/bin/gcc-4.9 -o conftest -I. -I/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.4.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/Cellar/mysql/5.7.21/include/mysql  -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls  -fno-common -pipe -fno-common   conftest.c  -L. -L/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl098/lib    -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -lruby-static -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -ldl -lobjc  "
ld: warning: directory not found for option '-L/usr/local/opt/openssl098/lib'
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { rb_str_set_len(); return 0; }
/* end */

--------------------

have_func: checking for rb_thread_start_timer()... -------------------- yes

"/usr/local/bin/gcc-4.9 -o conftest -I. -I/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.4.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/Cellar/mysql/5.7.21/include/mysql  -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls  -fno-common -pipe -fno-common   conftest.c  -L. -L/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl098/lib    -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -lruby-static -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -ldl -lobjc  "
conftest.c: In function 't':
conftest.c:3:53: error: 'rb_thread_start_timer' undeclared (first use in this function)
 int t() { void ((*volatile p)()); p = (void ((*)()))rb_thread_start_timer; return 0; }
                                                     ^
conftest.c:3:53: note: each undeclared identifier is reported only once for each function it appears in
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))rb_thread_start_timer; return 0; }
/* end */

"/usr/local/bin/gcc-4.9 -o conftest -I. -I/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.4.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/Cellar/mysql/5.7.21/include/mysql  -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls  -fno-common -pipe -fno-common   conftest.c  -L. -L/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib -L. -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl098/lib    -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -lruby-static -L/usr/local/Cellar/mysql/5.7.21/lib -lmysqlclient -lssl -lcrypto  -ldl -lobjc  "
ld: warning: directory not found for option '-L/usr/local/opt/openssl098/lib'
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { rb_thread_start_timer(); return 0; }
/* end */

--------------------

have_header: checking for mysql.h... -------------------- no

"/usr/local/bin/gcc-4.9 -E -I. -I/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.4.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/Cellar/mysql/5.7.21/include/mysql  -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls  -fno-common -pipe -fno-common    conftest.c -o conftest.i"
In file included from conftest.c:1:0:
/usr/local/Cellar/mysql/5.7.21/include/mysql/mysql.h:35:23: fatal error: sys/types.h: No such file or directory
 #include <sys/types.h>
                       ^
compilation terminated.
checked program was:
/* begin */
1: #include <mysql.h>
/* end */

--------------------

have_header: checking for mysql/mysql.h... -------------------- no

"/usr/local/bin/gcc-4.9 -E -I. -I/Users/MYACCOUNT/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.4.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/usr/local/Cellar/mysql/5.7.21/include/mysql  -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls  -fno-common -pipe -fno-common    conftest.c -o conftest.i"
In file included from conftest.c:1:0:
/usr/local/include/mysql/mysql.h:35:23: fatal error: sys/types.h: No such file or directory
 #include <sys/types.h>
                       ^
compilation terminated.
checked program was:
/* begin */
1: #include <mysql/mysql.h>
/* end */

--------------------

我通過Brew安裝了mysql并保持mysql,mysql @ 5.6或mysql@5.7有效.路徑在.bash_profile中設置：

### Customize path for MYSQL
MYSQL=/usr/local/mysql/bin
export PATH=$PATH:$MYSQL
export DYLD_LIBRARY_PATH=/usr/local/mysql/lib:$DYLD_LIBRARY_PATH

當我切換到mysql@5.6或5.7時,我相應地改變了路徑.
一般來說,mysql似乎存在一些問題.

當Ruby 1.8.7中的一個webapp,運行mysql數(shù)據(jù)庫的Rails 3.2.5時,另外兩個具有相同技術堆棧的webapp無法重新安裝mysql gem或連接到數(shù)據(jù)庫.

$rake db:migrate --trace
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
Mysql::Error: Table 'dev_WEBPROJECT.safts' doesn't exist: SHOW FULL FIELDS FROM `safts`
/Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/gems/activerecord-3.2.5/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:243:in `query'
/Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/gems/activerecord-3.2.5/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:243:in `execute'
/Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/gems/activerecord-3.2.5/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `log'
.
.
.
/Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/gems/rake-0.9.6/lib/rake/application.rb:70:in `run'
/Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/gems/rake-0.9.6/bin/rake:37
/Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/bin/rake:22:in `load'
/Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/bin/rake:22
/Users/MYACCOUNT/.rvm/gems/ruby-1.8.7-p374@WEBPROJECT/bin/ruby_executable_hooks:15
Tasks: TOP => db:migrate => environment

有人可以幫忙嗎？

解決方法:

Mojave更改了編譯C擴展所需的頭文件的位置.您可能需要運行以下命令來安裝mysql gem：

sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg -target /

參考：https:///setup/osx/10.14-mojave