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90 lines
2.6 KiB
Python
90 lines
2.6 KiB
Python
# Check for a module in a set of extension directories.
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# An extension directory should contain a Setup file
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# and one or more .o files or a lib.a file.
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import os
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import parsesetup
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def checkextensions(unknown, extensions):
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files = []
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modules = []
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edict = {}
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for e in extensions:
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setup = os.path.join(e, 'Setup')
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liba = os.path.join(e, 'lib.a')
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if not os.path.isfile(liba):
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liba = None
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edict[e] = parsesetup.getsetupinfo(setup), liba
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for mod in unknown:
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for e in extensions:
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(mods, vars), liba = edict[e]
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if mod not in mods:
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continue
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modules.append(mod)
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if liba:
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# If we find a lib.a, use it, ignore the
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# .o files, and use *all* libraries for
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# *all* modules in the Setup file
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if liba in files:
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break
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files.append(liba)
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for m in list(mods.keys()):
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files = files + select(e, mods, vars,
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m, 1)
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break
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files = files + select(e, mods, vars, mod, 0)
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break
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return files, modules
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def select(e, mods, vars, mod, skipofiles):
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files = []
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for w in mods[mod]:
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w = treatword(w)
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if not w:
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continue
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w = expandvars(w, vars)
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for w in w.split():
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if skipofiles and w[-2:] == '.o':
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continue
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# Assume $var expands to absolute pathname
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if w[0] not in ('-', '$') and w[-2:] in ('.o', '.a'):
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w = os.path.join(e, w)
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if w[:2] in ('-L', '-R') and w[2:3] != '$':
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w = w[:2] + os.path.join(e, w[2:])
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files.append(w)
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return files
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cc_flags = ['-I', '-D', '-U']
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cc_exts = ['.c', '.C', '.cc', '.c++']
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def treatword(w):
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if w[:2] in cc_flags:
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return None
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if w[:1] == '-':
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return w # Assume loader flag
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head, tail = os.path.split(w)
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base, ext = os.path.splitext(tail)
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if ext in cc_exts:
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tail = base + '.o'
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w = os.path.join(head, tail)
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return w
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def expandvars(str, vars):
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i = 0
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while i < len(str):
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i = k = str.find('$', i)
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if i < 0:
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break
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i = i+1
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var = str[i:i+1]
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i = i+1
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if var == '(':
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j = str.find(')', i)
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if j < 0:
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break
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var = str[i:j]
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i = j+1
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if var in vars:
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str = str[:k] + vars[var] + str[i:]
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i = k
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return str
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