xref: /aosp_15_r20/external/libpcap/pcap/compiler-tests.h (revision 8b26181f966a6af5cf6981a6f474313de533bb28)
1*8b26181fSAndroid Build Coastguard Worker /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
2*8b26181fSAndroid Build Coastguard Worker /*
3*8b26181fSAndroid Build Coastguard Worker  * Copyright (c) 1993, 1994, 1995, 1996, 1997
4*8b26181fSAndroid Build Coastguard Worker  *	The Regents of the University of California.  All rights reserved.
5*8b26181fSAndroid Build Coastguard Worker  *
6*8b26181fSAndroid Build Coastguard Worker  * Redistribution and use in source and binary forms, with or without
7*8b26181fSAndroid Build Coastguard Worker  * modification, are permitted provided that the following conditions
8*8b26181fSAndroid Build Coastguard Worker  * are met:
9*8b26181fSAndroid Build Coastguard Worker  * 1. Redistributions of source code must retain the above copyright
10*8b26181fSAndroid Build Coastguard Worker  *    notice, this list of conditions and the following disclaimer.
11*8b26181fSAndroid Build Coastguard Worker  * 2. Redistributions in binary form must reproduce the above copyright
12*8b26181fSAndroid Build Coastguard Worker  *    notice, this list of conditions and the following disclaimer in the
13*8b26181fSAndroid Build Coastguard Worker  *    documentation and/or other materials provided with the distribution.
14*8b26181fSAndroid Build Coastguard Worker  * 3. All advertising materials mentioning features or use of this software
15*8b26181fSAndroid Build Coastguard Worker  *    must display the following acknowledgement:
16*8b26181fSAndroid Build Coastguard Worker  *	This product includes software developed by the Computer Systems
17*8b26181fSAndroid Build Coastguard Worker  *	Engineering Group at Lawrence Berkeley Laboratory.
18*8b26181fSAndroid Build Coastguard Worker  * 4. Neither the name of the University nor of the Laboratory may be used
19*8b26181fSAndroid Build Coastguard Worker  *    to endorse or promote products derived from this software without
20*8b26181fSAndroid Build Coastguard Worker  *    specific prior written permission.
21*8b26181fSAndroid Build Coastguard Worker  *
22*8b26181fSAndroid Build Coastguard Worker  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23*8b26181fSAndroid Build Coastguard Worker  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24*8b26181fSAndroid Build Coastguard Worker  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25*8b26181fSAndroid Build Coastguard Worker  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26*8b26181fSAndroid Build Coastguard Worker  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27*8b26181fSAndroid Build Coastguard Worker  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28*8b26181fSAndroid Build Coastguard Worker  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29*8b26181fSAndroid Build Coastguard Worker  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30*8b26181fSAndroid Build Coastguard Worker  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31*8b26181fSAndroid Build Coastguard Worker  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32*8b26181fSAndroid Build Coastguard Worker  * SUCH DAMAGE.
33*8b26181fSAndroid Build Coastguard Worker  */
34*8b26181fSAndroid Build Coastguard Worker 
35*8b26181fSAndroid Build Coastguard Worker #ifndef lib_pcap_compiler_tests_h
36*8b26181fSAndroid Build Coastguard Worker #define lib_pcap_compiler_tests_h
37*8b26181fSAndroid Build Coastguard Worker 
38*8b26181fSAndroid Build Coastguard Worker /*
39*8b26181fSAndroid Build Coastguard Worker  * This was introduced by Clang:
40*8b26181fSAndroid Build Coastguard Worker  *
41*8b26181fSAndroid Build Coastguard Worker  *     https://clang.llvm.org/docs/LanguageExtensions.html#has-attribute
42*8b26181fSAndroid Build Coastguard Worker  *
43*8b26181fSAndroid Build Coastguard Worker  * in some version (which version?); it has been picked up by GCC 5.0.
44*8b26181fSAndroid Build Coastguard Worker  */
45*8b26181fSAndroid Build Coastguard Worker #ifndef __has_attribute
46*8b26181fSAndroid Build Coastguard Worker   /*
47*8b26181fSAndroid Build Coastguard Worker    * It's a macro, so you can check whether it's defined to check
48*8b26181fSAndroid Build Coastguard Worker    * whether it's supported.
49*8b26181fSAndroid Build Coastguard Worker    *
50*8b26181fSAndroid Build Coastguard Worker    * If it's not, define it to always return 0, so that we move on to
51*8b26181fSAndroid Build Coastguard Worker    * the fallback checks.
52*8b26181fSAndroid Build Coastguard Worker    */
53*8b26181fSAndroid Build Coastguard Worker   #define __has_attribute(x) 0
54*8b26181fSAndroid Build Coastguard Worker #endif
55*8b26181fSAndroid Build Coastguard Worker 
56*8b26181fSAndroid Build Coastguard Worker /*
57*8b26181fSAndroid Build Coastguard Worker  * Note that the C90 spec's "6.8.1 Conditional inclusion" and the
58*8b26181fSAndroid Build Coastguard Worker  * C99 spec's and C11 spec's "6.10.1 Conditional inclusion" say:
59*8b26181fSAndroid Build Coastguard Worker  *
60*8b26181fSAndroid Build Coastguard Worker  *    Prior to evaluation, macro invocations in the list of preprocessing
61*8b26181fSAndroid Build Coastguard Worker  *    tokens that will become the controlling constant expression are
62*8b26181fSAndroid Build Coastguard Worker  *    replaced (except for those macro names modified by the defined unary
63*8b26181fSAndroid Build Coastguard Worker  *    operator), just as in normal text.  If the token "defined" is
64*8b26181fSAndroid Build Coastguard Worker  *    generated as a result of this replacement process or use of the
65*8b26181fSAndroid Build Coastguard Worker  *    "defined" unary operator does not match one of the two specified
66*8b26181fSAndroid Build Coastguard Worker  *    forms prior to macro replacement, the behavior is undefined.
67*8b26181fSAndroid Build Coastguard Worker  *
68*8b26181fSAndroid Build Coastguard Worker  * so you shouldn't use defined() in a #define that's used in #if or
69*8b26181fSAndroid Build Coastguard Worker  * #elif.  Some versions of Clang, for example, will warn about this.
70*8b26181fSAndroid Build Coastguard Worker  *
71*8b26181fSAndroid Build Coastguard Worker  * Instead, we check whether the pre-defined macros for particular
72*8b26181fSAndroid Build Coastguard Worker  * compilers are defined and, if not, define the "is this version XXX
73*8b26181fSAndroid Build Coastguard Worker  * or a later version of this compiler" macros as 0.
74*8b26181fSAndroid Build Coastguard Worker  */
75*8b26181fSAndroid Build Coastguard Worker 
76*8b26181fSAndroid Build Coastguard Worker /*
77*8b26181fSAndroid Build Coastguard Worker  * Check whether this is GCC major.minor or a later release, or some
78*8b26181fSAndroid Build Coastguard Worker  * compiler that claims to be "just like GCC" of that version or a
79*8b26181fSAndroid Build Coastguard Worker  * later release.
80*8b26181fSAndroid Build Coastguard Worker  */
81*8b26181fSAndroid Build Coastguard Worker 
82*8b26181fSAndroid Build Coastguard Worker #if ! defined(__GNUC__)
83*8b26181fSAndroid Build Coastguard Worker   /* Not GCC and not "just like GCC" */
84*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_GNUC_VERSION(major, minor) 0
85*8b26181fSAndroid Build Coastguard Worker #else
86*8b26181fSAndroid Build Coastguard Worker   /* GCC or "just like GCC" */
87*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_GNUC_VERSION(major, minor) \
88*8b26181fSAndroid Build Coastguard Worker 	(__GNUC__ > (major) || \
89*8b26181fSAndroid Build Coastguard Worker 	 (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
90*8b26181fSAndroid Build Coastguard Worker #endif
91*8b26181fSAndroid Build Coastguard Worker 
92*8b26181fSAndroid Build Coastguard Worker /*
93*8b26181fSAndroid Build Coastguard Worker  * Check whether this is Clang major.minor or a later release.
94*8b26181fSAndroid Build Coastguard Worker  */
95*8b26181fSAndroid Build Coastguard Worker 
96*8b26181fSAndroid Build Coastguard Worker #if !defined(__clang__)
97*8b26181fSAndroid Build Coastguard Worker   /* Not Clang */
98*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_CLANG_VERSION(major, minor) 0
99*8b26181fSAndroid Build Coastguard Worker #else
100*8b26181fSAndroid Build Coastguard Worker   /* Clang */
101*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_CLANG_VERSION(major, minor) \
102*8b26181fSAndroid Build Coastguard Worker 	(__clang_major__ > (major) || \
103*8b26181fSAndroid Build Coastguard Worker 	 (__clang_major__ == (major) && __clang_minor__ >= (minor)))
104*8b26181fSAndroid Build Coastguard Worker #endif
105*8b26181fSAndroid Build Coastguard Worker 
106*8b26181fSAndroid Build Coastguard Worker /*
107*8b26181fSAndroid Build Coastguard Worker  * Check whether this is Sun C/SunPro C/Oracle Studio major.minor
108*8b26181fSAndroid Build Coastguard Worker  * or a later release.
109*8b26181fSAndroid Build Coastguard Worker  *
110*8b26181fSAndroid Build Coastguard Worker  * The version number in __SUNPRO_C is encoded in hex BCD, with the
111*8b26181fSAndroid Build Coastguard Worker  * uppermost hex digit being the major version number, the next
112*8b26181fSAndroid Build Coastguard Worker  * one or two hex digits being the minor version number, and
113*8b26181fSAndroid Build Coastguard Worker  * the last digit being the patch version.
114*8b26181fSAndroid Build Coastguard Worker  *
115*8b26181fSAndroid Build Coastguard Worker  * It represents the *compiler* version, not the product version;
116*8b26181fSAndroid Build Coastguard Worker  * see
117*8b26181fSAndroid Build Coastguard Worker  *
118*8b26181fSAndroid Build Coastguard Worker  *    https://sourceforge.net/p/predef/wiki/Compilers/
119*8b26181fSAndroid Build Coastguard Worker  *
120*8b26181fSAndroid Build Coastguard Worker  * for a partial mapping, which we assume continues for later
121*8b26181fSAndroid Build Coastguard Worker  * 12.x product releases.
122*8b26181fSAndroid Build Coastguard Worker  */
123*8b26181fSAndroid Build Coastguard Worker 
124*8b26181fSAndroid Build Coastguard Worker #if ! defined(__SUNPRO_C)
125*8b26181fSAndroid Build Coastguard Worker   /* Not Sun/Oracle C */
126*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_SUNC_VERSION(major,minor) 0
127*8b26181fSAndroid Build Coastguard Worker #else
128*8b26181fSAndroid Build Coastguard Worker   /* Sun/Oracle C */
129*8b26181fSAndroid Build Coastguard Worker   #define PCAP_SUNPRO_VERSION_TO_BCD(major, minor) \
130*8b26181fSAndroid Build Coastguard Worker 	(((minor) >= 10) ? \
131*8b26181fSAndroid Build Coastguard Worker 	    (((major) << 12) | (((minor)/10) << 8) | (((minor)%10) << 4)) : \
132*8b26181fSAndroid Build Coastguard Worker 	    (((major) << 8) | ((minor) << 4)))
133*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_SUNC_VERSION(major,minor) \
134*8b26181fSAndroid Build Coastguard Worker 	(__SUNPRO_C >= PCAP_SUNPRO_VERSION_TO_BCD((major), (minor)))
135*8b26181fSAndroid Build Coastguard Worker #endif
136*8b26181fSAndroid Build Coastguard Worker 
137*8b26181fSAndroid Build Coastguard Worker /*
138*8b26181fSAndroid Build Coastguard Worker  * Check whether this is IBM XL C major.minor or a later release.
139*8b26181fSAndroid Build Coastguard Worker  *
140*8b26181fSAndroid Build Coastguard Worker  * The version number in __xlC__ has the major version in the
141*8b26181fSAndroid Build Coastguard Worker  * upper 8 bits and the minor version in the lower 8 bits.
142*8b26181fSAndroid Build Coastguard Worker  * On AIX __xlC__ is always defined, __ibmxl__ becomes defined in XL C 16.1.
143*8b26181fSAndroid Build Coastguard Worker  * On Linux since XL C 13.1.6 __xlC__ is not defined by default anymore, but
144*8b26181fSAndroid Build Coastguard Worker  * __ibmxl__ is defined since at least XL C 13.1.1.
145*8b26181fSAndroid Build Coastguard Worker  */
146*8b26181fSAndroid Build Coastguard Worker 
147*8b26181fSAndroid Build Coastguard Worker #if ! defined(__xlC__) && ! defined(__ibmxl__)
148*8b26181fSAndroid Build Coastguard Worker   /* Not XL C */
149*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_XL_C_VERSION(major,minor) 0
150*8b26181fSAndroid Build Coastguard Worker #else
151*8b26181fSAndroid Build Coastguard Worker   /* XL C */
152*8b26181fSAndroid Build Coastguard Worker   #if defined(__ibmxl__)
153*8b26181fSAndroid Build Coastguard Worker     /*
154*8b26181fSAndroid Build Coastguard Worker      * Later Linux version of XL C; use __ibmxl_version__ to test
155*8b26181fSAndroid Build Coastguard Worker      * the version.
156*8b26181fSAndroid Build Coastguard Worker      */
157*8b26181fSAndroid Build Coastguard Worker     #define PCAP_IS_AT_LEAST_XL_C_VERSION(major, minor) \
158*8b26181fSAndroid Build Coastguard Worker 	(__ibmxl_version__ > (major) || \
159*8b26181fSAndroid Build Coastguard Worker 	 (__ibmxl_version__ == (major) && __ibmxl_release__ >= (minor)))
160*8b26181fSAndroid Build Coastguard Worker   #else /* __ibmxl__ */
161*8b26181fSAndroid Build Coastguard Worker     /*
162*8b26181fSAndroid Build Coastguard Worker      * __ibmxl__ not defined; use __xlC__ to test the version.
163*8b26181fSAndroid Build Coastguard Worker      */
164*8b26181fSAndroid Build Coastguard Worker     #define PCAP_IS_AT_LEAST_XL_C_VERSION(major, minor) \
165*8b26181fSAndroid Build Coastguard Worker 	(__xlC__ >= (((major) << 8) | (minor)))
166*8b26181fSAndroid Build Coastguard Worker   #endif /* __ibmxl__ */
167*8b26181fSAndroid Build Coastguard Worker #endif
168*8b26181fSAndroid Build Coastguard Worker 
169*8b26181fSAndroid Build Coastguard Worker /*
170*8b26181fSAndroid Build Coastguard Worker  * Check whether this is HP aC++/HP C major.minor or a later release.
171*8b26181fSAndroid Build Coastguard Worker  *
172*8b26181fSAndroid Build Coastguard Worker  * The version number in __HP_aCC is encoded in zero-padded decimal BCD,
173*8b26181fSAndroid Build Coastguard Worker  * with the "A." stripped off, the uppermost two decimal digits being
174*8b26181fSAndroid Build Coastguard Worker  * the major version number, the next two decimal digits being the minor
175*8b26181fSAndroid Build Coastguard Worker  * version number, and the last two decimal digits being the patch version.
176*8b26181fSAndroid Build Coastguard Worker  * (Strip off the A., remove the . between the major and minor version
177*8b26181fSAndroid Build Coastguard Worker  * number, and add two digits of patch.)
178*8b26181fSAndroid Build Coastguard Worker  */
179*8b26181fSAndroid Build Coastguard Worker 
180*8b26181fSAndroid Build Coastguard Worker #if ! defined(__HP_aCC)
181*8b26181fSAndroid Build Coastguard Worker   /* Not HP C */
182*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_HP_C_VERSION(major,minor) 0
183*8b26181fSAndroid Build Coastguard Worker #else
184*8b26181fSAndroid Build Coastguard Worker   /* HP C */
185*8b26181fSAndroid Build Coastguard Worker   #define PCAP_IS_AT_LEAST_HP_C_VERSION(major,minor) \
186*8b26181fSAndroid Build Coastguard Worker 	(__HP_aCC >= ((major)*10000 + (minor)*100))
187*8b26181fSAndroid Build Coastguard Worker #endif
188*8b26181fSAndroid Build Coastguard Worker 
189*8b26181fSAndroid Build Coastguard Worker #endif /* lib_pcap_compiler_tests_h */
190