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- # Check for a module in a set of extension directories.
- # An extension directory should contain a Setup file
- # and one or more .o files or a lib.a file.
-
- import os
- import string
- import parsesetup
-
- def checkextensions(unknown, extensions):
- files = []
- modules = []
- edict = {}
- for e in extensions:
- setup = os.path.join(e, 'Setup')
- liba = os.path.join(e, 'lib.a')
- if not os.path.isfile(liba):
- liba = None
- edict[e] = parsesetup.getsetupinfo(setup), liba
- for mod in unknown:
- for e in extensions:
- (mods, vars), liba = edict[e]
- if not mods.has_key(mod):
- continue
- modules.append(mod)
- if liba:
- # If we find a lib.a, use it, ignore the
- # .o files, and use *all* libraries for
- # *all* modules in the Setup file
- if liba in files:
- break
- files.append(liba)
- for m in mods.keys():
- files = files + select(e, mods, vars,
- m, 1)
- break
- files = files + select(e, mods, vars, mod, 0)
- break
- return files, modules
-
- def select(e, mods, vars, mod, skipofiles):
- files = []
- for w in mods[mod]:
- w = treatword(w)
- if not w:
- continue
- w = expandvars(w, vars)
- for w in string.split(w):
- if skipofiles and w[-2:] == '.o':
- continue
- if w[0] != '-' and w[-2:] in ('.o', '.a'):
- w = os.path.join(e, w)
- if w[:2] in ('-L', '-R'):
- w = w[:2] + os.path.join(e, w[2:])
- files.append(w)
- return files
-
- cc_flags = ['-I', '-D', '-U']
- cc_exts = ['.c', '.C', '.cc', '.c++']
-
- def treatword(w):
- if w[:2] in cc_flags:
- return None
- if w[:1] == '-':
- return w # Assume loader flag
- head, tail = os.path.split(w)
- base, ext = os.path.splitext(tail)
- if ext in cc_exts:
- tail = base + '.o'
- w = os.path.join(head, tail)
- return w
-
- def expandvars(str, vars):
- i = 0
- while i < len(str):
- i = k = string.find(str, '$', i)
- if i < 0:
- break
- i = i+1
- var = str[i:i+1]
- i = i+1
- if var == '(':
- j = string.find(str, ')', i)
- if j < 0:
- break
- var = str[i:j]
- i = j+1
- if vars.has_key(var):
- str = str[:k] + vars[var] + str[i:]
- i = k
- return str
-