Lots of things added. README written (mostly).
diff --git a/Tools/freeze/checkextensions.py b/Tools/freeze/checkextensions.py
new file mode 100644
index 0000000..a7890d8
--- /dev/null
+++ b/Tools/freeze/checkextensions.py
@@ -0,0 +1,87 @@
+# 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)
+ if skipofiles and w[-2:] == '.o':
+ continue
+ if w[0] != '-' and w[-2:] in ('.o', '.a'):
+ w = os.path.join(e, w)
+ 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