# New User, cannot run "Hello World" on OS X **URL:** \ **Category:** Rails\ **Created:** [March 5, 2009, 6:32pm UTC](https://www.ruby-forum.com/t/new-user-cannot-run-hello-world-on-os-x/162100 "2009-03-05T18:32:00Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![jsulmar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f4b2a3/32.png) [@jsulmar](https://www.ruby-forum.com/u/jsulmar)\ **Post date:** [March 5, 2009, 6:32pm UTC](https://www.ruby-forum.com/t/new-user-cannot-run-hello-world-on-os-x/162100/1 "2009-03-05T18:32:00Z")
I installed a ROR environment on my OS X machine, and I cant’ past “go” with my “hello world” application. Can anyone help me figure this out? Problem Summary I cannot get my “Hello World” application to work. [http://localhost:3000/](http://localhost:3000/) view is OK but [http://localhost:3000/say/hello/](http://localhost:3000/say/hello/) fails Environment Mac OS X v10.5.6 ruby 1.8.7 (2008-08-11 patchlevel 72) gem 1.3.1 rails 2.2.2 mysql mysql Ver 14.14 Distrib 5.1.32, for apple-darwin9.5.0 (i386) using readline 5.1 (followed install procedure at > **[Dan Benjamin](https://danbenjamin.com)** > > Dan Benjamin's personal website. ) I created a “say” controller with an empty “hello” method. I also created view.rhtml ERROR- Browser View [http://localhost:3000/say/hello/](http://localhost:3000/say/hello/) MissingSourceFile in SayController#hello no such file to load – mysql RAILS\_ROOT: /Users/Joes/Sites/joes\_app This error occurred while loading the following files: mysql Mongrel Console View Rendered /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/ action\_controller/templates/rescues/\_trace (136.7ms) Rendered /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/ action\_controller/templates/rescues/\_request\_and\_response (1.2ms) Rendering /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/ action\_controller/templates/rescues/layout.erb (internal\_server\_error) WEBrick Console View !!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql. 127.0.0.1 - - [05/Mar/2009:09:36:28 EST] “GET /say/hello/ HTTP/1.1” 500 14173 - → /say/hello/ “gem install mysql” – failure console log (partial) joe-sulmars-imac2:~ Joes$ gem install mysql WARNING: Installing to ~/.gem since /usr/local/lib/ruby/gems/1.8 and /usr/local/bin aren’t both writable. Building native extensions. This could take a while… ERROR: Error installing mysql: ERROR: Failed to build gem native extension. /usr/local/bin/ruby extconf.rb install mysql checking for mysql\_query() in -lmysqlclient… no checking for main() in -lm… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lz… yes checking for mysql\_query() in -lmysqlclient… no checking for main() in -lsocket… no checking for mysql\_query() in -lmysqlclient… no checking for main() in -lnsl… no checking for mysql\_query() in -lmysqlclient… 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. mkmf.log (partial) find\_library: checking for mysql\_query() in -lmysqlclient… -------------------- no "gcc -o conftest -I. -I/usr/local/lib/ruby/1.8/i686-darwin9.6.0 -I. -I/ usr/local/include -D\_XOPEN\_SOURCE -D\_DARWIN\_C\_SOURCE - D\_XOPEN\_SOURCE=1 -fno-common -pipe -fno-common conftest.c -L. -L/ usr/local/lib -L/usr/local/lib -L. -lruby-static -lmysqlclient - lpthread -ldl -lobjc " conftest.c: In function ‘t’: conftest.c:3: error: ‘mysql\_query’ undeclared (first use in this function) conftest.c:3: error: (Each undeclared identifier is reported only once conftest.c:3: error: 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\_query; return 0; } /_ end \*/ ---
**Author:** ![jsulmar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f4b2a3/32.png) [@jsulmar](https://www.ruby-forum.com/u/jsulmar)\ **Post date:** [March 5, 2009, 6:43pm UTC](https://www.ruby-forum.com/t/new-user-cannot-run-hello-world-on-os-x/162100/2 "2009-03-05T18:43:45Z")
Looks like you’ve got the i386 version of mysql… that makes things easier… Try… gem install -V mysql – --with-mysql-config=/usr/local/mysql/bin/ mysql\_config -philip ---
**Author:** ![jsulmar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f4b2a3/32.png) [@jsulmar](https://www.ruby-forum.com/u/jsulmar)\ **Post date:** [March 5, 2009, 8:27pm UTC](https://www.ruby-forum.com/t/new-user-cannot-run-hello-world-on-os-x/162100/3 "2009-03-05T20:27:31Z")
Philip H. wrote: > Looks like you’ve got the i386 version of mysql… that makes things > easier… > > Try… > > gem install -V mysql – --with-mysql-config=/usr/local/mysql/bin/ > mysql\_config > > -philip Depending on your installation it might take some additional tweaking as well. I you end up getting an error related a .dylib file then search this forum for a recent post that has the answer. ---
**Author:** ![jsulmar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f4b2a3/32.png) [@jsulmar](https://www.ruby-forum.com/u/jsulmar)\ **Post date:** [March 6, 2009, 2:25am UTC](https://www.ruby-forum.com/t/new-user-cannot-run-hello-world-on-os-x/162100/4 "2009-03-06T02:25:29Z")
Thanks for the responses. After reading and experimenting a lot today, I have solved, or at least worked around, the problems for my installation. It seems: 1. rails 2.2.2 requires a connection to a working database even if the application does not use a database (e.g. “Hello World”). Otherwise, you get the “SayController#hello” message 2. the default database used by rails 2.2.2 is sqlite3, so if you want to use mysql you need to create the project with “rails my\_app -d mysql” ( or you can edit database.yml) 3. the mysql gem installer must be told where MySQL has been installed. “sudo gem install mysql – --with-mysql-dir=/usr/local/mysql” 4. after successfully installing the mysql gem, my “Hello World” application still produced a browser message "dlsym(0x1ee0dc0, Init\_mysql): symbol not found ". The mysql gem does not seem to work with 64-bit MySQL. By installing the 32 bit MySQL package I was able to resolve this final issue. Whew! I’m lucky it only took 2 days. Now I can start creating some real bugs. ---
**Author:** ![jsulmar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/f4b2a3/32.png) [@jsulmar](https://www.ruby-forum.com/u/jsulmar)\ **Post date:** [March 6, 2009, 7:51am UTC](https://www.ruby-forum.com/t/new-user-cannot-run-hello-world-on-os-x/162100/5 "2009-03-06T07:51:57Z")
Just as an aside, if you are just experimenting with small things, SQLite works really REALLY well. I recommend maybe giving it a shot … as long as you don’t go all crazy outside of Rails’ handling of SQL, then the portability of your code from SQLite to almost any other DB adapter (my experience has been with PostgreSQL) is relatively easy.