Source Code for Module SCons.Scanner.Prog

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 23   
 24  __revision__ = "src/engine/SCons/Scanner/Prog.py 5023 2010/06/14 22:05:46 scons" 
 25   
 26  import SCons.Node 
 27  import SCons.Node.FS 
 28  import SCons.Scanner 
 29  import SCons.Util 
 30   
 31  # global, set by --debug=findlibs 
 32  print_find_libs = None 
 33   
 34 -def 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   
 41 -def scan(node, env, libpath = ()): 
 42      """ 
 43      This scanner scans program files for static-library 
 44      dependencies.  It will search the LIBPATH environment variable 
 45      for libraries specified in the LIBS variable, returning any 
 46      files it finds as dependencies. 
 47      """ 
 48      try: 
 49          libs = env['LIBS'] 
 50      except KeyError: 
 51          # There are no LIBS in this environment, so just return a null list: 
 52          return [] 
 53      if SCons.Util.is_String(libs): 
 54          libs = libs.split() 
 55      else: 
 56          libs = SCons.Util.flatten(libs) 
 57   
 58      try: 
 59          prefix = env['LIBPREFIXES'] 
 60          if not SCons.Util.is_List(prefix): 
 61              prefix = [ prefix ] 
 62      except KeyError: 
 63          prefix = [ '' ] 
 64   
 65      try: 
 66          suffix = env['LIBSUFFIXES'] 
 67          if not SCons.Util.is_List(suffix): 
 68              suffix = [ suffix ] 
 69      except KeyError: 
 70          suffix = [ '' ] 
 71   
 72      pairs = [] 
 73      for suf in map(env.subst, suffix): 
 74          for pref in map(env.subst, prefix): 
 75              pairs.append((pref, suf)) 
 76   
 77      result = [] 
 78   
 79      if callable(libpath): 
 80          libpath = libpath() 
 81   
 82      find_file = SCons.Node.FS.find_file 
 83      adjustixes = SCons.Util.adjustixes 
 84      for lib in libs: 
 85          if SCons.Util.is_String(lib): 
 86              lib = env.subst(lib) 
 87              for pref, suf in pairs: 
 88                  l = adjustixes(lib, pref, suf) 
 89                  l = find_file(l, libpath, verbose=print_find_libs) 
 90                  if l: 
 91                      result.append(l) 
 92          else: 
 93              result.append(lib) 
 94   
 95      return result 
 96   
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