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#!/usr/bin/ruby
require 'fileutils'
basedir = File.dirname(__FILE__)
conf = {}
enable = {}
until ARGV.empty?
arg = ARGV.shift
case arg
when '-C'
# ignore
when /\A--srcdir=(.*)/
conf['SRCDIR'] = srcdir = $1
when /\A(CC|CFLAGS|CXX|CXXFLAGS|LD|LDFLAGS)=(.*)/
conf[$1] = $2
when /\A--host=(.*)/
host = $1
when /\A--enable-([^=]+)(?:=(.*))?/
enable[$1] = $2 || true
when /\A--disable-([^=]+)/
enable[$1] = false
end
end
IO.foreach("#{srcdir}/configure.ac") do |line|
if /^AC_INIT\((.*)\)/ =~ line
version = $1.split(/,\s*/)[1]
version.gsub!(/\A\[|\]\z/, '')
conf['VERSION'] = version
break
end
end
builddir = srcdir == "." ? enable['builddir'] : "."
conf['TARGET'] = /^x64/ =~ host ? "X86_WIN64" : "X86_WIN32"
FileUtils.mkdir_p([builddir, "#{builddir}/include", "#{builddir}/src/x86"])
FileUtils.cp("#{basedir}/fficonfig.h", ".", preserve: true)
hdr = IO.binread("#{srcdir}/include/ffi.h.in")
hdr.gsub!(/@(\w+)@/) {conf[$1] || $&}
hdr.gsub!(/^(#if\s+)@\w+@/, '\10')
IO.binwrite("#{builddir}/include/ffi.h", hdr)
mk = IO.binread("#{basedir}/libffi.mk.tmpl")
mk.gsub!(/@(\w+)@/) {conf[$1] || $&}
IO.binwrite("Makefile", mk)
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