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Preston Lee

Founder, CEO, OpenRain.com

About

During the day I run OpenRain in Phoenix: a Ruby on Rails development shop. During the night... well... I still have to run OpenRain, but when I find time to breath, I exhale here. If you'd like to get in touch professionally, don't hesitate to contact me via the OpenRain website.

Peace,

Preston

Installing The MySQL Ruby Gem When Using The Official MySQL .dmg

If you installed MySQL using the official .dmg package provided by MySQL AB/Sun and are trying to install the native MySQL gem, you’ll need to pass a bunch of flags to the gem install process to get the thing to compile. Try this..

sudo gem install mysql — –with-mysql-config=/usr/local/mysql/bin/mysql_config

..if you still have issues (check your /opt/local/lib/ruby/gems/<ruby_ver>/gems/mysql-<gem_ver>/mkmf.log file), try this instead..

sudo gem install mysql — –with-mysql-dir=/usr/local/mysql –with-mysql-include=/usr/local/mysql/include/ –with-mysql-lib=/usr/local/mysql/lib/ –with-mysql-config=/usr/local/mysql/bin/mysql_config

Run `sudo gem install mysql` and definitely recheck the log file again as the gem install process sometimes reports false positives even if native components fail to install.

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. 12 Aug 08 | Computer | Comments (0)

Ruby Troubleshooting: Hpricot On OS X Leopard

If you upgraded to Leopard, you may be getting this nasty error when trying to install Hpricot, which is required by other popular gems such as mechanize..

preston$ sudo gem install mechanize
Password: ********

Bulk updating Gem source index for: http://gems.rubyforge.org
Install required dependency hpricot? [Yn]
Select which gem to install for your platform (i686-darwin8.10.3)
1. hpricot 0.6 (mswin32)
2. hpricot 0.6 (jruby)
3. hpricot 0.6 (ruby)
4. hpricot 0.5 (ruby)
5. hpricot 0.5 (mswin32)
6. Skip this gem
7. Cancel installation
> 3
Building native extensions. This could take a while…
ERROR: While executing gem … (Gem::Installer::ExtensionBuildError)
ERROR: Failed to build gem native extension.

ruby extconf.rb install mechanize
checking for main() in -lc… no
creating Makefile

make
gcc -I. -I. -I/opt/local/lib/ruby/1.8/i686-darwin8.10.3 -I. -I/opt/local/include -fno-common -O2 -fno-common -pipe -fno-common -c hpricot_scan.c
cc -dynamic -bundle -undefined suppress -flat_namespace -L/opt/local/lib -L”/opt/local/lib” -o hpricot_scan.bundle hpricot_scan.o -lruby -lpthread -ldl -lobjc
/usr/bin/ld: /usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libpthread.dylib unknown flags (type) of section 6 (__TEXT,__dof_plockstat) in load command 0
/usr/bin/ld: /usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libdl.dylib unknown flags (type) of section 6 (__TEXT,__dof_plockstat) in load command 0
/usr/bin/ld: /usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libobjc.dylib load command 9 unknown cmd field
/usr/bin/ld: /usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libSystem.dylib unknown flags (type) of section 6 (__TEXT,__dof_plockstat) in load command 0
/usr/bin/ld: /usr/lib/libSystem.B.dylib unknown flags (type) of section 6 (__TEXT,__dof_plockstat) in load command 0
collect2: ld returned 1 exit status
make: *** [hpricot_scan.bundle] Error 1

Gem files will remain installed in /opt/local/lib/ruby/gems/1.8/gems/hpricot-0.6 for inspection.
Results logged to /opt/local/lib/ruby/gems/1.8/gems/hpricot-0.6/ext/hpricot_scan/gem_make.out

The issue is that Xcode 3 must be upgraded as well; Hpricot’s native components cannot be built with the older Tiger development tools on Leopard. After installing Xcode 3 from either your Leopard DVD or Apple Developer Connection, run the install again…

preston$ sudo gem install mechanize

Install required dependency hpricot? [Yn] Y
Select which gem to install for your platform (i686-darwin8.10.3)
1. hpricot 0.6 (mswin32)
2. hpricot 0.6 (jruby)
3. hpricot 0.6 (ruby)
4. hpricot 0.5 (ruby)
5. hpricot 0.5 (mswin32)
6. Skip this gem
7. Cancel installation
> 3
Building native extensions. This could take a while…
Successfully installed mechanize-0.6.11
Successfully installed hpricot-0.6
Installing ri documentation for mechanize-0.6.11…
Installing ri documentation for hpricot-0.6…
Installing RDoc documentation for mechanize-0.6.11…
Installing RDoc documentation for hpricot-0.6…

Success!

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. 03 Jan 08 | Computer | Comment (1)

Solaris 10 x64: Get Your Sound Card Working

When I built the $1000, 2TB file server, the on-board nVidia HD audio support of the Asus M2NPV-VM motherboard didn’t work out of the box. It’s a trivial fix using the recently open sourced OSS drivers from 4Front Technologies. (I also tested a Creative Audigy 2 PCI sound card using these drivers under Solaris 10 11/06, and the playback worked just as well.)

  1. Download the Solaris x64 .pkg.
  2. `pkgadd -d oss-solaris-v4.0-1004-i386.pkg`
  3. `osstest`. You should here the sweet sweet sound of.. umm.. sound, and the following printed on the console..

bash-3.00$ osstest
Sound subsystem and version: OSS 4.0 (build 1004/200707062145) (0×00040002)
Platform: SunOS/i86pc 5.10 Generic_118855-33

*** Scanning sound adapter #-1 ***
/dev/oss/hdaudio0/pcm0 (audio engine 0): nVidia HD Audio play-front output
Note! Device is in use (by PID 0/VMIX) but will try anyway
- Performing audio playback test…
OK OK OK
/dev/oss/hdaudio0/pcm1 (audio engine 1): nVidia HD Audio play-side output
- Performing audio playback test…
OK OK OK
/dev/oss/hdaudio0/pcm2 (audio engine 2): nVidia HD Audio play-center/LFE output
- Performing audio playback test…
OK OK OK
/dev/oss/hdaudio0/spdout0 (audio engine 3): nVidia HD Audio spdif output
- Performing audio playback test…
OK OK OK
/dev/oss/hdaudio0/pcmin0 (audio engine 4): nVidia HD Audio record input
- Skipping input only device

*** All tests completed OK ***

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. 17 Aug 07 | Computer, Music | Comments (0)

OS X Ruby Troubleshooting: “command not found: dot”

If you’re trying to run rdoc but are getting errors like..

Generating HTML…
Diagrams: ./opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27: command not found: dot -Tismap dot/f_0.dot
./opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27: command not found: dot -Tismap dot/f_1.dot

..the package you need to install is called graphviz. You can install it using Darwin Ports on OS X like so..

sudo port install graphviz

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. 26 Apr 07 | Computer | Comments (0)