我无法在我的 Windows7 x64 系统中安装 mysql2 gem。我尝试同时使用 32 位和 64 位版本的 MySQL 服务器，但没有一个能让我更进一步。
我安装了 Ruby 1.8、开发工具包和 Rails 平台。我什至安装了 minGW 来允许 C++/C 编译东西。MySQL 服务器安装在默认位置。
运行命令时：
C:\Users\Arne>gem install mysql2 -- --with-mysql-include="C:\Program Files (x86)\MySQL\MySQL Server 5.1\include" --with-mysql-lib="C:\Program Files (x86)\MySQL\MySQL Server 5.1\lib\"
我从控制台收到以下输出：
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
*** 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=C:/Ruby/bin/ruby
--with-mysql-dir
--without-mysql-dir
--with-mysql-include=${mysql-dir}/include
--with-mysql-lib=${mysql-dir}/lib
--with-libmysqllib
--without-libmysqllib
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
C:/Ruby/bin/ruby.exe extconf.rb --with-mysql-include=C:\Program Files (x
86)\MySQL\MySQL Server 5.1\include --with-mysql-lib=C:\Program Files (x86)\MySQL
\MySQL Server 5.1\lib"
checking for rb_thread_blocking_region()... no
checking for main() in -llibmysql... no
Gem files will remain installed in C:/Ruby/lib/ruby/gems/1.8/gems/mysql2-0.3.2 f
or inspection.
Results logged to C:/Ruby/lib/ruby/gems/1.8/gems/mysql2-0.3.2/ext/mysql2/gem_mak
e.out
根据 Rubygems，我的环境的输出是：
C:\Users\Arne>gem env
RubyGems Environment:
- RUBYGEMS VERSION: 1.7.2
- RUBY VERSION: 1.8.7 (2011-02-18 patchlevel 334) [i386-mingw32]
- INSTALLATION DIRECTORY: C:/Ruby/lib/ruby/gems/1.8
- RUBY EXECUTABLE: C:/Ruby/bin/ruby.exe
- EXECUTABLE DIRECTORY: C:/Ruby/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86-mingw32
- GEM PATHS:
- C:/Ruby/lib/ruby/gems/1.8
- C:/Users/Arne/.gem/ruby/1.8
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- http://rubygems.org/
系统上还安装了以下 gem：
C:\Users\Arne>gem list --local
*** LOCAL GEMS ***
abstract (1.0.0)
actionmailer (3.0.7)
actionpack (3.0.7)
activemodel (3.0.7)
activerecord (3.0.7)
activeresource (3.0.7)
activesupport (3.0.7)
arel (2.0.9)
builder (3.0.0, 2.1.2)
bundler (1.0.12)
erubis (2.7.0, 2.6.6)
fastthread (1.0.7)
i18n (0.5.0)
mail (2.3.0, 2.2.18)
mime-types (1.16)
mysql (2.8.1 x86-mingw32)
polyglot (0.3.1)
rack (1.2.2)
rack-mount (0.7.2, 0.6.14)
rack-test (0.5.7)
rails (3.0.7)
railties (3.0.7)
rake (0.8.7)
rdoc (3.5.3, 2.5.11)
rdoc-data (2.5.3)
rubygems-update (1.7.2)
thor (0.14.6)
treetop (1.4.9)
tzinfo (0.3.27, 0.3.26)
我不知道有什么遗漏或错误，但脚本指向的输出文件包含以下数据：
mkmf.log：
have_func: checking for rb_thread_blocking_region()... -------------------- no
"gcc -o conftest -I. -IC:/Ruby/lib/ruby/1.8/i386-mingw32 -I. -g -O2 -DFD_SETSIZE=256 conftest.c -L. -LC:/Ruby/lib -L. -lmsvcrt-ruby18-static -lshell32 -lws2_32 "
conftest.c: In function 't':
conftest.c:7:53: error: 'rb_thread_blocking_region' undeclared (first use in this function)
conftest.c:7:53: note: each undeclared identifier is reported only once for each function it appears in
checked program was:
/* begin */
1: #include <ws2tcpip.h>
2: #include <winsock2.h>
3: #include <windows.h>
4:
5: /*top*/
6: int main() { return 0; }
7: int t() { void ((*volatile p)()); p = (void ((*)()))rb_thread_blocking_region; return 0; }
/* end */
"gcc -o conftest -I. -IC:/Ruby/lib/ruby/1.8/i386-mingw32 -I. -g -O2 -DFD_SETSIZE=256 conftest.c -L. -LC:/Ruby/lib -L. -lmsvcrt-ruby18-static -lshell32 -lws2_32 "
C:\Users\Arne\AppData\Local\Temp\ccCicaNu.o: In function `t':
C:\Ruby\lib\ruby\gems\1.8\gems\mysql2-0.3.2\ext\mysql2/conftest.c:3: undefined reference to `rb_thread_blocking_region'
collect2: ld returned 1 exit status
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { rb_thread_blocking_region(); return 0; }
/* end */
--------------------
have_library: checking for main() in -llibmysql... -------------------- no
"gcc -o conftest -I. -IC:/Ruby/lib/ruby/1.8/i386-mingw32 -I. -IC:\Program -g -O2 -DFD_SETSIZE=256 conftest.c -L. -LC:/Ruby/lib -LC:\Program -L. -lmsvcrt-ruby18-static -llibmysql -lshell32 -lws2_32 "
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../../mingw32/bin/ld.exe: cannot find -llibmysql
collect2: ld returned 1 exit status
checked program was:
/* begin */
1: #include <ws2tcpip.h>
2: #include <winsock2.h>
3: #include <windows.h>
4:
5: /*top*/
6: int main() { return 0; }
7: int t() { void ((*volatile p)()); p = (void ((*)()))main; return 0; }
/* end */
"gcc -o conftest -I. -IC:/Ruby/lib/ruby/1.8/i386-mingw32 -I. -IC:\Program -g -O2 -DFD_SETSIZE=256 conftest.c -L. -LC:/Ruby/lib -LC:\Program -L. -lmsvcrt-ruby18-static -llibmysql -lshell32 -lws2_32 "
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../../mingw32/bin/ld.exe: cannot find -llibmysql
collect2: ld returned 1 exit status
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { main(); return 0; }
/* end */
--------------------
gem_make.out：
C:/Ruby/bin/ruby.exe extconf.rb --with-mysql-include=C:\Program Files (x86)\MySQL\MySQL Server 5.1\include --with-mysql-lib=C:\Program Files (x86)\MySQL\MySQL Server 5.1\lib"
checking for rb_thread_blocking_region()... no
checking for main() in -llibmysql... no
我希望有人能指出我做错了什么，或者我的开发系统中实际上缺少什么来正确安装和工作这个 gem。