pornel/improved-pngquant — pull request #38 by tomgidden (2013-07-08 10:58:23+00:00)
Title: undefined reference to symbol '__pow_finite@@GLIBC_2.15'

In some circumstances, libm does not appear to be linking to libimagequant. By specifying -lm after libimagequant in the makefile, it's fixed.