Lots of things added. README written (mostly).

1 files changed, 87 insertions, 0 deletions

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