Squashed 'waflib/' changes from 915dcb1..e7a29b6

e7a29b6 Upgrade to waf 2.0.15
8280f9d Add command for running executables from the build directory
8073c1a Make make_simple_dox() safe in case of exception
70d03b8 Avoid use of global counter hacks for configuration display
b7d689a Rewrite test framework
94deadf Automatically add options and move add_flags() to options context
f4259ee Reduce system include path noise
927b608 Automatically display configuration header
c44b8f3 Set line justification from a constant in the wscript
a48e26f Automatically detect if wscript has a test hook
ef66724 Save runtime variables in the environment
63bcbcd Clean up TestContext
b1d9505 Add ExecutionContext for setting runtime environment
387c1df Add show_diff() and test_file_equals() utilities
29d4d29 Fix in-tree library paths
9fde01f Add custom configuration context
6d3612f Add lib_path_name constant

git-subtree-dir: waflib
git-subtree-split: e7a29b6b9b2f842314244c23c14d8f8f560904e1

1 files changed, 72 insertions, 0 deletions

diff --git a/extras/c_dumbpreproc.py b/extras/c_dumbpreproc.py
new file mode 100644
index 0000000..ce9e1a4
--- /dev/null
+++ b/extras/c_dumbpreproc.py
@@ -0,0 +1,72 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# Thomas Nagy, 2006-2010 (ita)
+
+"""
+Dumb C/C++ preprocessor for finding dependencies
+
+It will look at all include files it can find after removing the comments, so the following
+will always add the dependency on both "a.h" and "b.h"::
+
+	#include "a.h"
+	#ifdef B
+		#include "b.h"
+	#endif
+	int main() {
+		return 0;
+	}
+
+To use::
+
+	def configure(conf):
+		conf.load('compiler_c')
+		conf.load('c_dumbpreproc')
+"""
+
+import re
+from waflib.Tools import c_preproc
+
+re_inc = re.compile(
+	'^[ \t]*(#|%:)[ \t]*(include)[ \t]*[<"](.*)[>"]\r*$',
+	re.IGNORECASE | re.MULTILINE)
+
+def lines_includes(node):
+	code = node.read()
+	if c_preproc.use_trigraphs:
+		for (a, b) in c_preproc.trig_def:
+			code = code.split(a).join(b)
+	code = c_preproc.re_nl.sub('', code)
+	code = c_preproc.re_cpp.sub(c_preproc.repl, code)
+	return [(m.group(2), m.group(3)) for m in re.finditer(re_inc, code)]
+
+parser = c_preproc.c_parser
+class dumb_parser(parser):
+	def addlines(self, node):
+		if node in self.nodes[:-1]:
+			return
+		self.currentnode_stack.append(node.parent)
+
+		# Avoid reading the same files again
+		try:
+			lines = self.parse_cache[node]
+		except KeyError:
+			lines = self.parse_cache[node] = lines_includes(node)
+
+		self.lines = lines + [(c_preproc.POPFILE, '')] +  self.lines
+
+	def start(self, node, env):
+		try:
+			self.parse_cache = node.ctx.parse_cache
+		except AttributeError:
+			self.parse_cache = node.ctx.parse_cache = {}
+
+		self.addlines(node)
+		while self.lines:
+			(x, y) = self.lines.pop(0)
+			if x == c_preproc.POPFILE:
+				self.currentnode_stack.pop()
+				continue
+			self.tryfind(y)
+
+c_preproc.c_parser = dumb_parser
+