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require 'formula'
class Pngcrush < Formula
homepage 'http://pmt.sourceforge.net/pngcrush/'
# Stay at least one version behind and use the old-versions directory,
# because tarballs are routinely removed and upstream won't change this
# practice.
url 'http://sourceforge.net/projects/pmt/files/pngcrush/old-versions/1.7/1.7.56/pngcrush-1.7.56.tar.gz'
sha1 'deb45dadf5a162d2e02efd242ea4eee0d3b31727'
def install
# Required to successfully build the bundled zlib 1.2.6
ENV.append_to_cflags "-DZ_SOLO"
# Required to enable "-cc" (color counting) option (disabled by default since 1.5.1)
ENV.append_to_cflags "-DPNGCRUSH_COUNT_COLORS"
system "make", "CC=#{ENV.cc}",
"LD=#{ENV.cc}",
"CFLAGS=#{ENV.cflags}",
"LDFLAGS=#{ENV.ldflags}"
bin.install 'pngcrush'
end
end
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