[libcrystax] Fix 'alloca' definition (bug #1170)

Signed-off-by: Dmitry Moskalchuk <dm@crystax.net>

sources/crystax/include/alloca.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2011-2015 CrystaX .NET.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CrystaX .NET ''AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CrystaX .NET OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of CrystaX .NET.
+ */
+
+#ifndef __CRYSTAX_ALLOCA_H_54030085552640179942B7123EA7CEDC
+#define __CRYSTAX_ALLOCA_H_54030085552640179942B7123EA7CEDC
+
+#include <crystax/id.h>
+
+#ifdef alloca
+#undef alloca
+#define alloca(sz) __builtin_alloca(sz)
+#endif
+
+#endif /* __CRYSTAX_ALLOCA_H_54030085552640179942B7123EA7CEDC */

tests/build/crystax-issue1170-alloca-redefined/jni/Android.mk

@@ -0,0 +1,7 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE    := test-alloca
+LOCAL_SRC_FILES := main.c
+LOCAL_CFLAGS    := -Wall -Wextra -Werror
+include $(BUILD_EXECUTABLE)

tests/build/crystax-issue1170-alloca-redefined/jni/Application.mk

@@ -0,0 +1 @@
+APP_ABI := all

tests/build/crystax-issue1170-alloca-redefined/jni/main.c

@@ -0,0 +1,7 @@
+#include <stdlib.h>
+#include <alloca.h>
+
+int main()
+{
+    return 0;
+}