From: Kem Mason <bulbous@...>
Date: 2009-04-13T04:20:01+09:00
Subject: Re: "gem install mysql" failing horribly on OS X leaopard

Frederick Cheung wrote:
> On 7 Sep 2008, at 12:47, Doug Livesey wrote:
>> ld: warning in /usr/local/mysql/lib/libmysqlclient.dylib, file is  
>> not of
>> required architecture
> 
> This appears to be the key bit: you're asking for an i386 executable
> but that library is apparently a different architecture (lipo -
> detailed_info /usr/local/mysql/lib/libmysqlclient.dylib will tell you
> what it is)
> 
> Fred

I did this, and my libmysqlclient.dylib was i386 -- but I noticed the 
compiler commands were:

gcc -I. -I. 
-I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin9.0 
-I. -DHAVE_MYSQL_H  -I/usr/local/mysql/include -Os -arch i386 
-fno-common -fno-common -arch ppc -arch i386 -Os -pipe -fno-common  -c 
mysql.c
cc -arch ppc -arch i386 -pipe -bundle -undefined dynamic_lookup -o 
mysql.bundle mysql.o -L"." 
-L"/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib" -L. 
-arch ppc -arch i386    -lruby -L/usr/local/mysql/lib -lmysqlclient -lz 
-lm  -lpthread -ldl -lm
#output:
ld warning: in /usr/local/mysql/lib/libmysqlclient.dylib, file is not of 
required architecture

I copy / pasted the commands stripping out all the '-arch ppc' 
instances, and everything worked great for me after that.

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