since two days I'm facing a problem I can't solve. I'm trying to install redmine on a debian machine. When it comes to installation for the gem mysql it fails. I don't know what to do anymore. My last instance is your help.
Error
root@host:~# gem1.8 install mysql
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
 ERROR: Failed to build gem native extension.
/usr/bin/ruby1.8 extconf.rb
checking for mysql_ssl_set()... no
checking for rb_str_set_len()... no
checking for rb_thread_start_timer()... no
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=/usr/bin/ruby1.8
 --with-mysql-config
 --without-mysql-config
Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out
What I've tried
- Installing packages by instruction: http://wiki.rubyonrails.org/database-support/mysql#linux_ubuntu
- installing with mysql_config parameter
 root@host:~# find / -name mysql_config
 /usr/bin/mysql_config
 root@host:~# gem1.8 install mysql -- --with-mysql-config=/usr/bin/mysql_config
System
user@host:~# uname -a  
Linux www.example.org 2.6.18-028stab070.4 #1 SMP Tue Aug 17 18:32:47 MSD 2010 x86_64 GNU/Linux
root@s15428277:~# aptitude search '~i (mysql|ruby)|mysql.*dev' i A libdbd-mysql-perl - A Perl5 database interface to the MySQL database p libghc6-hsql-mysql-dev - Multi-Database Interface System for Haskell p libgnademysql-dev - GNat Ada Database Environment - MySQL programming interface p liblua5.1-sql-mysql-dev - luasql development files for the lua language version 5.1 i libmysql++-dev - mysql C++ library bindings (development) i A libmysql++2c2a - mysql C++ library bindings (runtime) p libmysql-ocaml-dev - OCaml bindings for MySql v libmysqlclient-dev - i libmysqlclient15-dev - MySQL database development files i A libmysqlclient15off - MySQL database client library i libopenssl-ruby1.8 - OpenSSL interface for Ruby 1.8 i A libreadline-ruby1.8 - Readline interface for Ruby 1.8 i A libruby1.8 - Libraries necessary to run Ruby 1.8 i libsqlite3-ruby1.8 - SQLite3 interface for Ruby 1.8 i A mysql-client-5.0 - MySQL database client binaries i A mysql-common - MySQL database common files i mysql-server - MySQL database server (metapackage depending on the latest version) i A mysql-server-5.0 - MySQL database server binaries i ruby1.8 - Interpreter of object-oriented scripting language Ruby 1.8 i ruby1.8-dev - Header files for compiling extension modules for the Ruby 1.8
root@host:~# gem1.8 --version 1.3.7 root@host:~# ruby1.8 --version ruby 1.8.7 (2008-08-11 patchlevel 72) [x86_64-linux]
Files
mkmf.log
have_func: checking for mysql_ssl_set()... -------------------- no
"cc -o conftest -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api    -I/usr/include/mysql  -DBIG_JOINS=1 -fPIC -fno-strict-aliasing -g -g -O2  -fPIC   conftest.c  -L. -L/usr/lib -L.  -rdynamic -Wl,-export-dynamic    -L/usr/lib/mysql -lmysqlclient  -lruby1.8-static -L/usr/lib/mysql -lmysqlclient  -lpthread -ldl -lcrypt -lm   -lc"
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 */
"cc -o conftest -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api    -I/usr/include/mysql  -DBIG_JOINS=1 -fPIC -fno-strict-aliasing -g -g -O2  -fPIC   conftest.c  -L. -L/usr/lib -L.  -rdynamic -Wl,-export-dynamic    -L/usr/lib/mysql -lmysqlclient  -lruby1.8-static -L/usr/lib/mysql -lmysqlclient  -lpthread -ldl -lcrypt -lm   -lc"
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()... -------------------- no
"cc -o conftest -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api    -I/usr/include/mysql  -DBIG_JOINS=1 -fPIC -fno-strict-aliasing -g -g -O2  -fPIC   conftest.c  -L. -L/usr/lib -L.  -rdynamic -Wl,-export-dynamic    -L/usr/lib/mysql -lmysqlclient  -lruby1.8-static -L/usr/lib/mysql -lmysqlclient  -lpthread -ldl -lcrypt -lm   -lc"
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 */
"cc -o conftest -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api    -I/usr/include/mysql  -DBIG_JOINS=1 -fPIC -fno-strict-aliasing -g -g -O2  -fPIC   conftest.c  -L. -L/usr/lib -L.  -rdynamic -Wl,-export-dynamic    -L/usr/lib/mysql -lmysqlclient  -lruby1.8-static -L/usr/lib/mysql -lmysqlclient  -lpthread -ldl -lcrypt -lm   -lc"
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()... -------------------- no
"cc -o conftest -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api    -I/usr/include/mysql  -DBIG_JOINS=1 -fPIC -fno-strict-aliasing -g -g -O2  -fPIC   conftest.c  -L. -L/usr/lib -L.  -rdynamic -Wl,-export-dynamic    -L/usr/lib/mysql -lmysqlclient  -lruby1.8-static -L/usr/lib/mysql -lmysqlclient  -lpthread -ldl -lcrypt -lm   -lc"
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 */
"cc -o conftest -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api    -I/usr/include/mysql  -DBIG_JOINS=1 -fPIC -fno-strict-aliasing -g -g -O2  -fPIC   conftest.c  -L. -L/usr/lib -L.  -rdynamic -Wl,-export-dynamic    -L/usr/lib/mysql -lmysqlclient  -lruby1.8-static -L/usr/lib/mysql -lmysqlclient  -lpthread -ldl -lcrypt -lm   -lc"
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
"cc -E -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api    -I/usr/include/mysql  -DBIG_JOINS=1 -fPIC -fno-strict-aliasing -g -g -O2  -fPIC    conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include 
/* end */
--------------------
have_header: checking for mysql/mysql.h... -------------------- no
"cc -E -I. -I/usr/lib/ruby/1.8/x86_64-linux -I/usr/lib/ruby/gems/1.8/gems/mysql-2.8.1/ext/mysql_api    -I/usr/include/mysql  -DBIG_JOINS=1 -fPIC -fno-strict-aliasing -g -g -O2  -fPIC    conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include 
/* end */
--------------------
    
ruby 1.8.7 (2010-08-16 patchlevel 302) [x86_64-linux]- JohannesM