xref: /dflybsd-src/contrib/tcpdump/compiler-tests.h (revision 59c07fbdf8168fa08c76c515186d561b5a92690c)
1*ed775ee7SAntonio Huete Jimenez /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
2*ed775ee7SAntonio Huete Jimenez /*
3*ed775ee7SAntonio Huete Jimenez  * Copyright (c) 1993, 1994, 1995, 1996, 1997
4*ed775ee7SAntonio Huete Jimenez  *	The Regents of the University of California.  All rights reserved.
5*ed775ee7SAntonio Huete Jimenez  *
6*ed775ee7SAntonio Huete Jimenez  * Redistribution and use in source and binary forms, with or without
7*ed775ee7SAntonio Huete Jimenez  * modification, are permitted provided that the following conditions
8*ed775ee7SAntonio Huete Jimenez  * are met:
9*ed775ee7SAntonio Huete Jimenez  * 1. Redistributions of source code must retain the above copyright
10*ed775ee7SAntonio Huete Jimenez  *    notice, this list of conditions and the following disclaimer.
11*ed775ee7SAntonio Huete Jimenez  * 2. Redistributions in binary form must reproduce the above copyright
12*ed775ee7SAntonio Huete Jimenez  *    notice, this list of conditions and the following disclaimer in the
13*ed775ee7SAntonio Huete Jimenez  *    documentation and/or other materials provided with the distribution.
14*ed775ee7SAntonio Huete Jimenez  * 3. All advertising materials mentioning features or use of this software
15*ed775ee7SAntonio Huete Jimenez  *    must display the following acknowledgement:
16*ed775ee7SAntonio Huete Jimenez  *	This product includes software developed by the Computer Systems
17*ed775ee7SAntonio Huete Jimenez  *	Engineering Group at Lawrence Berkeley Laboratory.
18*ed775ee7SAntonio Huete Jimenez  * 4. Neither the name of the University nor of the Laboratory may be used
19*ed775ee7SAntonio Huete Jimenez  *    to endorse or promote products derived from this software without
20*ed775ee7SAntonio Huete Jimenez  *    specific prior written permission.
21*ed775ee7SAntonio Huete Jimenez  *
22*ed775ee7SAntonio Huete Jimenez  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23*ed775ee7SAntonio Huete Jimenez  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24*ed775ee7SAntonio Huete Jimenez  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25*ed775ee7SAntonio Huete Jimenez  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26*ed775ee7SAntonio Huete Jimenez  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27*ed775ee7SAntonio Huete Jimenez  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28*ed775ee7SAntonio Huete Jimenez  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29*ed775ee7SAntonio Huete Jimenez  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30*ed775ee7SAntonio Huete Jimenez  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31*ed775ee7SAntonio Huete Jimenez  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32*ed775ee7SAntonio Huete Jimenez  * SUCH DAMAGE.
33*ed775ee7SAntonio Huete Jimenez  */
34*ed775ee7SAntonio Huete Jimenez 
35*ed775ee7SAntonio Huete Jimenez #ifndef nd_compiler_tests_h
36*ed775ee7SAntonio Huete Jimenez #define nd_compiler_tests_h
37*ed775ee7SAntonio Huete Jimenez 
38*ed775ee7SAntonio Huete Jimenez /*
39*ed775ee7SAntonio Huete Jimenez  * This was introduced by Clang:
40*ed775ee7SAntonio Huete Jimenez  *
41*ed775ee7SAntonio Huete Jimenez  *     https://clang.llvm.org/docs/LanguageExtensions.html#has-attribute
42*ed775ee7SAntonio Huete Jimenez  *
43*ed775ee7SAntonio Huete Jimenez  * in some version (which version?); it has been picked up by GCC 5.0.
44*ed775ee7SAntonio Huete Jimenez  */
45*ed775ee7SAntonio Huete Jimenez #ifndef __has_attribute
46*ed775ee7SAntonio Huete Jimenez   /*
47*ed775ee7SAntonio Huete Jimenez    * It's a macro, so you can check whether it's defined to check
48*ed775ee7SAntonio Huete Jimenez    * whether it's supported.
49*ed775ee7SAntonio Huete Jimenez    *
50*ed775ee7SAntonio Huete Jimenez    * If it's not, define it to always return 0, so that we move on to
51*ed775ee7SAntonio Huete Jimenez    * the fallback checks.
52*ed775ee7SAntonio Huete Jimenez    */
53*ed775ee7SAntonio Huete Jimenez   #define __has_attribute(x) 0
54*ed775ee7SAntonio Huete Jimenez #endif
55*ed775ee7SAntonio Huete Jimenez 
56*ed775ee7SAntonio Huete Jimenez /*
57*ed775ee7SAntonio Huete Jimenez  * Note that the C90 spec's "6.8.1 Conditional inclusion" and the
58*ed775ee7SAntonio Huete Jimenez  * C99 spec's and C11 spec's "6.10.1 Conditional inclusion" say:
59*ed775ee7SAntonio Huete Jimenez  *
60*ed775ee7SAntonio Huete Jimenez  *    Prior to evaluation, macro invocations in the list of preprocessing
61*ed775ee7SAntonio Huete Jimenez  *    tokens that will become the controlling constant expression are
62*ed775ee7SAntonio Huete Jimenez  *    replaced (except for those macro names modified by the defined unary
63*ed775ee7SAntonio Huete Jimenez  *    operator), just as in normal text.  If the token "defined" is
64*ed775ee7SAntonio Huete Jimenez  *    generated as a result of this replacement process or use of the
65*ed775ee7SAntonio Huete Jimenez  *    "defined" unary operator does not match one of the two specified
66*ed775ee7SAntonio Huete Jimenez  *    forms prior to macro replacement, the behavior is undefined.
67*ed775ee7SAntonio Huete Jimenez  *
68*ed775ee7SAntonio Huete Jimenez  * so you shouldn't use defined() in a #define that's used in #if or
69*ed775ee7SAntonio Huete Jimenez  * #elif.  Some versions of Clang, for example, will warn about this.
70*ed775ee7SAntonio Huete Jimenez  *
71*ed775ee7SAntonio Huete Jimenez  * Instead, we check whether the pre-defined macros for particular
72*ed775ee7SAntonio Huete Jimenez  * compilers are defined and, if not, define the "is this version XXX
73*ed775ee7SAntonio Huete Jimenez  * or a later version of this compiler" macros as 0.
74*ed775ee7SAntonio Huete Jimenez  */
75*ed775ee7SAntonio Huete Jimenez 
76*ed775ee7SAntonio Huete Jimenez /*
77*ed775ee7SAntonio Huete Jimenez  * Check whether this is GCC major.minor or a later release, or some
78*ed775ee7SAntonio Huete Jimenez  * compiler that claims to be "just like GCC" of that version or a
79*ed775ee7SAntonio Huete Jimenez  * later release.
80*ed775ee7SAntonio Huete Jimenez  */
81*ed775ee7SAntonio Huete Jimenez 
82*ed775ee7SAntonio Huete Jimenez #if ! defined(__GNUC__)
83*ed775ee7SAntonio Huete Jimenez #define ND_IS_AT_LEAST_GNUC_VERSION(major, minor) 0
84*ed775ee7SAntonio Huete Jimenez #else
85*ed775ee7SAntonio Huete Jimenez #define ND_IS_AT_LEAST_GNUC_VERSION(major, minor) \
86*ed775ee7SAntonio Huete Jimenez 	(__GNUC__ > (major) || \
87*ed775ee7SAntonio Huete Jimenez 	 (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
88*ed775ee7SAntonio Huete Jimenez #endif
89*ed775ee7SAntonio Huete Jimenez 
90*ed775ee7SAntonio Huete Jimenez /*
91*ed775ee7SAntonio Huete Jimenez  * Check whether this is Sun C/SunPro C/Oracle Studio major.minor
92*ed775ee7SAntonio Huete Jimenez  * or a later release.
93*ed775ee7SAntonio Huete Jimenez  *
94*ed775ee7SAntonio Huete Jimenez  * The version number in __SUNPRO_C is encoded in hex BCD, with the
95*ed775ee7SAntonio Huete Jimenez  * uppermost hex digit being the major version number, the next
96*ed775ee7SAntonio Huete Jimenez  * one or two hex digits being the minor version number, and
97*ed775ee7SAntonio Huete Jimenez  * the last digit being the patch version.
98*ed775ee7SAntonio Huete Jimenez  *
99*ed775ee7SAntonio Huete Jimenez  * It represents the *compiler* version, not the product version;
100*ed775ee7SAntonio Huete Jimenez  * see
101*ed775ee7SAntonio Huete Jimenez  *
102*ed775ee7SAntonio Huete Jimenez  *    https://sourceforge.net/p/predef/wiki/Compilers/
103*ed775ee7SAntonio Huete Jimenez  *
104*ed775ee7SAntonio Huete Jimenez  * for a partial mapping, which we assume continues for later
105*ed775ee7SAntonio Huete Jimenez  * 12.x product releases.
106*ed775ee7SAntonio Huete Jimenez  */
107*ed775ee7SAntonio Huete Jimenez 
108*ed775ee7SAntonio Huete Jimenez #if ! defined(__SUNPRO_C)
109*ed775ee7SAntonio Huete Jimenez #define ND_IS_AT_LEAST_SUNC_VERSION(major,minor) 0
110*ed775ee7SAntonio Huete Jimenez #else
111*ed775ee7SAntonio Huete Jimenez #define ND_SUNPRO_VERSION_TO_BCD(major, minor) \
112*ed775ee7SAntonio Huete Jimenez 	(((minor) >= 10) ? \
113*ed775ee7SAntonio Huete Jimenez 	    (((major) << 12) | (((minor)/10) << 8) | (((minor)%10) << 4)) : \
114*ed775ee7SAntonio Huete Jimenez 	    (((major) << 8) | ((minor) << 4)))
115*ed775ee7SAntonio Huete Jimenez #define ND_IS_AT_LEAST_SUNC_VERSION(major,minor) \
116*ed775ee7SAntonio Huete Jimenez 	(__SUNPRO_C >= ND_SUNPRO_VERSION_TO_BCD((major), (minor)))
117*ed775ee7SAntonio Huete Jimenez #endif
118*ed775ee7SAntonio Huete Jimenez 
119*ed775ee7SAntonio Huete Jimenez /*
120*ed775ee7SAntonio Huete Jimenez  * Check whether this is IBM XL C major.minor or a later release.
121*ed775ee7SAntonio Huete Jimenez  *
122*ed775ee7SAntonio Huete Jimenez  * The version number in __xlC__ has the major version in the
123*ed775ee7SAntonio Huete Jimenez  * upper 8 bits and the minor version in the lower 8 bits.
124*ed775ee7SAntonio Huete Jimenez  */
125*ed775ee7SAntonio Huete Jimenez 
126*ed775ee7SAntonio Huete Jimenez #if ! defined(__xlC__)
127*ed775ee7SAntonio Huete Jimenez #define ND_IS_AT_LEAST_XL_C_VERSION(major,minor) 0
128*ed775ee7SAntonio Huete Jimenez #else
129*ed775ee7SAntonio Huete Jimenez #define ND_IS_AT_LEAST_XL_C_VERSION(major, minor) \
130*ed775ee7SAntonio Huete Jimenez 	(__xlC__ >= (((major) << 8) | (minor)))
131*ed775ee7SAntonio Huete Jimenez #endif
132*ed775ee7SAntonio Huete Jimenez 
133*ed775ee7SAntonio Huete Jimenez /*
134*ed775ee7SAntonio Huete Jimenez  * Check whether this is HP aC++/HP C major.minor or a later release.
135*ed775ee7SAntonio Huete Jimenez  *
136*ed775ee7SAntonio Huete Jimenez  * The version number in __HP_aCC is encoded in zero-padded decimal BCD,
137*ed775ee7SAntonio Huete Jimenez  * with the "A." stripped off, the uppermost two decimal digits being
138*ed775ee7SAntonio Huete Jimenez  * the major version number, the next two decimal digits being the minor
139*ed775ee7SAntonio Huete Jimenez  * version number, and the last two decimal digits being the patch version.
140*ed775ee7SAntonio Huete Jimenez  * (Strip off the A., remove the . between the major and minor version
141*ed775ee7SAntonio Huete Jimenez  * number, and add two digits of patch.)
142*ed775ee7SAntonio Huete Jimenez  */
143*ed775ee7SAntonio Huete Jimenez 
144*ed775ee7SAntonio Huete Jimenez #if ! defined(__HP_aCC)
145*ed775ee7SAntonio Huete Jimenez #define ND_IS_AT_LEAST_HP_C_VERSION(major,minor) 0
146*ed775ee7SAntonio Huete Jimenez #else
147*ed775ee7SAntonio Huete Jimenez #define ND_IS_AT_LEAST_HP_C_VERSION(major,minor) \
148*ed775ee7SAntonio Huete Jimenez 	(__HP_aCC >= ((major)*10000 + (minor)*100))
149*ed775ee7SAntonio Huete Jimenez #endif
150*ed775ee7SAntonio Huete Jimenez 
151*ed775ee7SAntonio Huete Jimenez #endif /* nd_funcattrs_h */
152