common/stdc/cc.h

   1 /*
   2  * Copyright (c) 2013 Vojtech Horky
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup libc
  30  * @{
  31  */
  32 /** @file
  33  * Macros related to used compiler (such as GCC-specific attributes).
  34  */
  35
  36 #ifndef _LIBC_CC_H_
  37 #define _LIBC_CC_H_
  38
  39 #ifndef __clang__
  40 #define ATTRIBUTE_OPTIMIZE(opt) \
  41     __attribute__ ((optimize(opt)))
  42 #else
  43 #define ATTRIBUTE_OPTIMIZE(opt)
  44 #endif
  45
  46 #define ATTRIBUTE_OPTIMIZE_NO_TLDP \
  47     ATTRIBUTE_OPTIMIZE("-fno-tree-loop-distribute-patterns")
  48
  49 #ifdef CONFIG_LTO
  50 #define DO_NOT_DISCARD __attribute__ ((used))
  51 #else
  52 #define DO_NOT_DISCARD
  53 #endif
  54
  55 #endif
  56
  57 /** @}
  58  */