def have_package(pkg, major = nil, minor = 0, micro = 0)
message = "#{pkg}"
unless major.nil?
message << " version (>= #{major}.#{minor}.#{micro})"
end
major ||= 0
enough_version = checking_for(checking_message(message)) do
check_version?(pkg, major, minor, micro)
end
if enough_version
libraries = libs_only_l(pkg)
dldflags = libs(pkg)
dldflags = (Shellwords.shellwords(dldflags) -
Shellwords.shellwords(libraries))
dldflags = dldflags.map {|s| /\s/ =~ s ? "\"#{s}\"" : s }.join(' ')
$libs += ' ' + libraries
if /mswin32/ =~ RUBY_PLATFORM
$DLDFLAGS += ' ' + dldflags
else
$LDFLAGS += ' ' + dldflags
end
$CFLAGS += ' ' + cflags(pkg)
end
enough_version
end