Firebird builds on both ARM and ARMEL

From this table you can see that firebird builds on both ARM and ARMEL ( ARMEL is just ARM with some hardware extras.) and here is the buildlog

If you use debian then you can download from here

Quote from linux tiny mailing list about the ARM market share

According to http://eetimes.eu/showArticle.jhtml?articleID=199702110

Arm shipped the processors in 250 million “smart phones” in 2006 (83%
market share in that niche).