src/etc/mklldeps.py

   1 # Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
   2 # file at the top-level directory of this distribution and at
   3 # http://rust-lang.org/COPYRIGHT.
   4 #
   5 # Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 # http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 # <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 # option. This file may not be copied, modified, or distributed
   9 # except according to those terms.
  10
  11 import os
  12 import sys
  13 import subprocess
  14
  15 f = open(sys.argv[1], 'wb')
  16
  17 components = sys.argv[2].split() # splits on whitespace
  18 enable_static = sys.argv[3]
  19 llvm_config = sys.argv[4]
  20
  21 f.write("""// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
  22 // file at the top-level directory of this distribution and at
  23 // http://rust-lang.org/COPYRIGHT.
  24 //
  25 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
  26 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
  27 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
  28 // option. This file may not be copied, modified, or distributed
  29 // except according to those terms.
  30
  31 // WARNING: THIS IS A GENERATED FILE, DO NOT MODIFY
  32 //          take a look at src/etc/mklldeps.py if you're interested
  33 """)
  34
  35
  36 def run(args):
  37     proc = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  38     out, err = proc.communicate()
  39
  40     if err:
  41         print("failed to run llvm_config: args = `{}`".format(args))
  42         print(err)
  43         sys.exit(1)
  44     return out
  45
  46 f.write("\n")
  47
  48 # LLVM libs
  49 args = [llvm_config, '--libs', '--system-libs']
  50
  51 args.extend(components)
  52 out = run(args)
  53 for lib in out.strip().replace("\n", ' ').split(' '):
  54     if len(lib) == 0:
  55         continue
  56     # in some cases we get extra spaces in between libs so ignore those
  57     if len(lib) == 1 and lib == ' ':
  58         continue
  59     # not all libs strictly follow -lfoo, on Bitrig, there is -pthread
  60     if lib[0:2] == '-l':
  61         lib = lib.strip()[2:]
  62     elif lib[0] == '-':
  63         lib = lib.strip()[1:]
  64     f.write("#[link(name = \"" + lib + "\"")
  65     # LLVM libraries are all static libraries
  66     if 'LLVM' in lib:
  67         f.write(", kind = \"static\"")
  68     f.write(")]\n")
  69
  70 # LLVM ldflags
  71 out = run([llvm_config, '--ldflags'])
  72 for lib in out.strip().split(' '):
  73     if lib[:2] == "-l":
  74         f.write("#[link(name = \"" + lib[2:] + "\")]\n")
  75
  76 # C++ runtime library
  77 out = run([llvm_config, '--cxxflags'])
  78 if enable_static == '1':
  79     assert('stdlib=libc++' not in out)
  80     f.write("#[link(name = \"stdc++\", kind = \"static\")]\n")
  81 else:
  82     # Note that we use `cfg_attr` here because on MSVC the C++ standard library
  83     # is not c++ or stdc++, but rather the linker takes care of linking the
  84     # right standard library.
  85     if 'stdlib=libc++' in out:
  86         f.write("#[cfg_attr(not(target_env = \"msvc\"), link(name = \"c++\"))]\n")
  87     else:
  88         f.write("#[cfg_attr(not(target_env = \"msvc\"), link(name = \"stdc++\"))]\n")
  89
  90 # Attach everything to an extern block
  91 f.write("extern {}\n")