1# MIT License 2# 3# Copyright The SCons Foundation 4# 5# Permission is hereby granted, free of charge, to any person obtaining 6# a copy of this software and associated documentation files (the 7# "Software"), to deal in the Software without restriction, including 8# without limitation the rights to use, copy, modify, merge, publish, 9# distribute, sublicense, and/or sell copies of the Software, and to 10# permit persons to whom the Software is furnished to do so, subject to 11# the following conditions: 12# 13# The above copyright notice and this permission notice shall be included 14# in all copies or substantial portions of the Software. 15# 16# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 17# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 18# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 24"""Dependency scanner for program files.""" 25 26import SCons.Node 27import SCons.Node.FS 28import SCons.Scanner 29import SCons.Util 30 31# global, set by --debug=findlibs 32print_find_libs = None 33 34def ProgramScanner(**kw): 35 """Return a prototype Scanner instance for scanning executable 36 files for static-lib dependencies""" 37 kw['path_function'] = SCons.Scanner.FindPathDirs('LIBPATH') 38 ps = SCons.Scanner.Base(scan, "ProgramScanner", **kw) 39 return ps 40 41def _subst_libs(env, libs): 42 """Substitute environment variables and split into list.""" 43 if SCons.Util.is_String(libs): 44 libs = env.subst(libs) 45 if SCons.Util.is_String(libs): 46 libs = libs.split() 47 elif SCons.Util.is_Sequence(libs): 48 _libs = [] 49 for l in libs: 50 _libs += _subst_libs(env, l) 51 libs = _libs 52 else: 53 # libs is an object (Node, for example) 54 libs = [libs] 55 return libs 56 57def scan(node, env, libpath = ()): 58 """Scans program files for static-library dependencies. 59 60 It will search the LIBPATH environment variable 61 for libraries specified in the LIBS variable, returning any 62 files it finds as dependencies. 63 """ 64 try: 65 libs = env['LIBS'] 66 except KeyError: 67 # There are no LIBS in this environment, so just return a null list: 68 return [] 69 70 libs = _subst_libs(env, libs) 71 72 try: 73 prefix = env['LIBPREFIXES'] 74 if not SCons.Util.is_List(prefix): 75 prefix = [ prefix ] 76 except KeyError: 77 prefix = [ '' ] 78 79 try: 80 suffix = env['LIBSUFFIXES'] 81 if not SCons.Util.is_List(suffix): 82 suffix = [ suffix ] 83 except KeyError: 84 suffix = [ '' ] 85 86 pairs = [] 87 for suf in map(env.subst, suffix): 88 for pref in map(env.subst, prefix): 89 pairs.append((pref, suf)) 90 91 result = [] 92 93 if callable(libpath): 94 libpath = libpath() 95 96 find_file = SCons.Node.FS.find_file 97 adjustixes = SCons.Util.adjustixes 98 for lib in libs: 99 if SCons.Util.is_String(lib): 100 for pref, suf in pairs: 101 l = adjustixes(lib, pref, suf) 102 l = find_file(l, libpath, verbose=print_find_libs) 103 if l: 104 result.append(l) 105 else: 106 result.append(lib) 107 108 return result 109 110# Local Variables: 111# tab-width:4 112# indent-tabs-mode:nil 113# End: 114# vim: set expandtab tabstop=4 shiftwidth=4: 115