compiler.hh revision 10291:56772eb01583 
1/*
2 * Copyright (c) 2012 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2006 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 */
42
43#ifndef __BASE_COMPILER_HH__
44#define __BASE_COMPILER_HH__
45
46// gcc C++11 status: http://gcc.gnu.org/projects/cxx0x.html
47// clang C++11 status: http://clang.llvm.org/cxx_status.html
48// http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
49
50/* Support for override control (final/override) */
51#undef M5_COMP_HAS_OVERRIDE_CONTROL
52
53#if defined(__GNUC__) && !defined(__clang__) /* Check for gcc */
54
55#  define M5_GCC_VERSION(maj, min) \
56    (__GNUC__ > (maj) || (__GNUC__ == (maj) && __GNUC_MINOR__ >= (min)))
57
58#  define M5_COMP_HAS_OVERRIDE_CONTROL M5_GCC_VERSION(4, 7)
59
60#elif defined(__clang__) /* Check for clang */
61
62#  define M5_COMP_HAS_OVERRIDE_CONTROL __has_feature(cxx_override_control)
63
64#else
65#  error "Need to define compiler options in base/compiler.hh"
66#endif
67
68
69#if M5_COMP_HAS_OVERRIDE_CONTROL
70#  define M5_ATTR_FINAL final
71#  define M5_ATTR_OVERRIDE override
72#else
73#  define M5_ATTR_FINAL
74#  define M5_ATTR_OVERRIDE
75#endif
76
77#if defined(__GNUC__) // clang or gcc
78#  define M5_ATTR_NORETURN  __attribute__((noreturn))
79#  define M5_DUMMY_RETURN
80#  define M5_VAR_USED __attribute__((unused))
81#  define M5_ATTR_PACKED __attribute__ ((__packed__))
82#  define M5_NO_INLINE __attribute__ ((__noinline__))
83#endif
84
85#if defined(__clang__)
86#  define M5_CLASS_VAR_USED M5_VAR_USED
87#else
88#  define M5_CLASS_VAR_USED
89#endif
90
91#endif // __BASE_COMPILER_HH__
92