Code drop from //branches/cupcake/...@124589

libc/include/features.h

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+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE
+ * COPYRIGHT OWNER 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.
+ */
+#ifndef _FEATURES_H_
+#define _FEATURES_H_
+
+/* certain Linux-specific programs expect a <features.h> header file
+ * that defines various features macros
+ */
+
+/* we do include a number of BSD extensions */
+#define  _BSD_SOURCE  1
+
+/* we do include a number of GNU extensions */
+#define  _GNU_SOURCE  1
+
+/* C95 support */
+#undef __USE_ISOC95
+#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L
+# define __USE_ISOC95   1
+#endif
+
+/* C99 support */
+#undef __USE_ISOC99
+#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
+# define __USE_ISOC99   1
+#endif
+
+/* Posix support */
+#define  __USE_POSIX   1
+#define  __USE_POSIX2  1
+#define  __USE_XPG     1
+
+#endif /* _FEATURES_H_ */