# 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 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 w.split(): | |
if skipofiles and w[-2:] == '.o': | |
continue | |
# Assume $var expands to absolute pathname | |
if w[0] not in ('-', '$') and w[-2:] in ('.o', '.a'): | |
w = os.path.join(e, w) | |
if w[:2] in ('-L', '-R') and w[2:3] != '$': | |
w = w[:2] + os.path.join(e, w[2:]) | |
files.append(w) | |
return files | |
cc_flags = ['-I', '-D', '-U'] | |
cc_exts = ['.c', '.C', '.cc', '.c++'] | |
def treatword(w): | |
if w[:2] in cc_flags: | |
return None | |
if w[:1] == '-': | |
return w # Assume loader flag | |
head, tail = os.path.split(w) | |
base, ext = os.path.splitext(tail) | |
if ext in cc_exts: | |
tail = base + '.o' | |
w = os.path.join(head, tail) | |
return w | |
def expandvars(str, vars): | |
i = 0 | |
while i < len(str): | |
i = k = str.find('$', i) | |
if i < 0: | |
break | |
i = i+1 | |
var = str[i:i+1] | |
i = i+1 | |
if var == '(': | |
j = str.find(')', 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 |