Handle alloca properlycompat

This adds missing includes for alloca. The man page of alloca(3) states
that alloca.h should be #include'd to use alloca.

Also work around missing alloca.h header on Windows by adding a
compatibility module.

Closes: #197

1 files changed, 32 insertions, 0 deletions

diff --git a/compat/alloca/wscript b/compat/alloca/wscript
new file mode 100644
index 00000000..36798973
--- /dev/null
+++ b/compat/alloca/wscript
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+# encoding: utf-8
+#
+# Copyright (C) 2018 Karl Linden <karl.j.linden@gmail.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+
+from waflib import Errors
+
+def options(opt):
+    pass
+
+def configure(conf):
+    try:
+        conf.check(header_name='alloca.h')
+    except Errors.ConfigurationError:
+        conf.env.append_unique('INCLUDES', conf.path.abspath())
+
+def build(bld):
+    pass