require 'formula' class Scale2x < Formula homepage 'http://scale2x.sourceforge.net' url 'http://sourceforge.net/projects/scale2x/files/scale2x/2.4/scale2x-2.4.tar.gz' sha1 '30bbd674dcdf134a58b34e75f87ed05bd716d484' depends_on :libpng def install # This function was renamed in current versions of libpng. inreplace 'file.c', 'png_set_gray_1_2_4_to_8', 'png_set_expand_gray_1_2_4_to_8' system "./configure", "--prefix=#{prefix}" system "make install" end end