lib.rb (2952B)
1 # Copyright, 2010-2012 by Jari Bakken. 2 # Copyright, 2013, by Samuel G. D. Williams. <http://www.codeotaku.com> 3 # 4 # Permission is hereby granted, free of charge, to any person obtaining a copy 5 # of this software and associated documentation files (the "Software"), to deal 6 # in the Software without restriction, including without limitation the rights 7 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 # copies of the Software, and to permit persons to whom the Software is 9 # furnished to do so, subject to the following conditions: 10 # 11 # The above copyright notice and this permission notice shall be included in 12 # all copies or substantial portions of the Software. 13 # 14 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 # THE SOFTWARE. 21 22 require 'mkmf' 23 24 module FFI 25 module Clang 26 module Lib 27 extend FFI::Library 28 29 # Use LLVM_CONFIG if it was explicitly specified: 30 llvm_config = ENV['LLVM_CONFIG'] 31 32 # If we aren't building for a specific version (e.g. travis) try to find llvm-config 33 unless ENV['LLVM_VERSION'] 34 llvm_config ||= MakeMakefile.find_executable0("llvm-config") 35 end 36 37 libs = [] 38 if ENV['LIBCLANG'] 39 libs << ENV['LIBCLANG'] 40 else 41 begin 42 xcode_dir = `xcode-select -p`.chomp 43 %W[ 44 #{xcode_dir}/Toolchains/XcodeDefault.xctoolchain/usr/lib/libclang.dylib 45 #{xcode_dir}/usr/lib/libclang.dylib 46 ].each do |f| 47 if File.exist? f 48 libs << f 49 break 50 end 51 end 52 rescue Errno::ENOENT 53 # Ignore 54 end 55 56 libs << "clang" 57 58 if llvm_config 59 llvm_library_dir = `#{llvm_config} --libdir`.chomp 60 platform = FFI::Clang.platform 61 62 case platform 63 when :darwin 64 libs << llvm_library_dir + '/libclang.dylib' 65 when :windows 66 llvm_bin_dir = `#{llvm_config} --bindir`.chomp 67 libs << llvm_bin_dir + '/libclang.dll' 68 else 69 libs << llvm_library_dir + '/libclang.so' 70 end 71 end 72 end 73 74 ffi_lib libs 75 76 def self.bitmask_from(enum, opts) 77 bitmask = 0 78 79 opts.each do |key, value| 80 if int = enum[key] 81 bitmask |= int 82 else 83 raise Error, "unknown option: #{key.inspect}, expected one of #{enum.symbols}" 84 end 85 end 86 87 bitmask 88 end 89 90 def self.opts_from(enum, bitmask) 91 bit = 1 92 opts = {} 93 while bitmask != 0 94 if bitmask & 1 95 if sym = enum[bit] 96 opts[sym] = true 97 else 98 raise Error, "unknown values: #{bit}, expected one of #{enum.symbols}" 99 end 100 end 101 bitmask >>= 1 102 bit <<= 1 103 end 104 opts 105 end 106 end 107 end 108 end