1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/* ws_diag_control.h
* Turn compiler diagnostic messages on and off.
*
* From FreeRADIUS build.h.
*
* @copyright 2013 The FreeRADIUS server project
*
* That project is covered by the GPLv2, so:
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __WS_DIAG_CONTROL_H__
#define __WS_DIAG_CONTROL_H__
#include "ws_compiler_tests.h"
#ifdef __cplusplus
extern "C" {
#endif
#define XSTRINGIFY(x) #x
/*
* Macros for controlling warnings in various compilers.
*/
#define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
/*
* XXX - this is only for GCC or GCC-compatible compilers, and we only use
* it to have a macro that takes a warning as an argument and turns it
* off in the appropriate fashion for Clang and GCC; it should only be
* used internally in this header.
*/
#define DIAG_DO_PRAGMA(x) _Pragma (#x)
#if defined(__clang__)
/*
* Clang, so we'd use _Pragma("clang diagnostic XXX"), if it's
* supported.
*/
#if WS_IS_AT_LEAST_CLANG_VERSION(2,8)
/*
* This is Clang 2.8 or later: we can use "clang diagnostic ignored -Wxxx"
* and "clang diagnostic push/pop".
*/
#define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
#define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
#define DIAG_ON(x) DIAG_PRAGMA(pop)
#endif
#elif defined(__GNUC__)
/*
* GCC, or a compiler (other than Clang) that claims to be GCC.
* We assume that the compiler accepts _Pragma("GCC diagnostic xxx")
* even if it's only claiming to be GCC.
*/
#if WS_IS_AT_LEAST_GNUC_VERSION(4,8)
/*
* This is GCC 4.8 or later, or a compiler claiming to be that.
* We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)
* and "GCC diagnostic push/pop" (introduced in 4.6), *and* gcc
* supports "-Wpedantic" (introduced in 4.8), allowing us to
* turn off pedantic warnings with DIAG_OFF().
*/
#define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
#define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
#define DIAG_ON(x) DIAG_PRAGMA(pop)
#endif
#endif
#ifndef DIAG_OFF
/*
* This is none of the above; we don't have any way to turn diagnostics
* on or off.
*
* XXX - you can do that in MSVC, but it's done differently; we'd
* have to have macros for *particular* diagnostics, using the
* warning flag for GCC and Clang and the error number for MSVC.
*/
#define DIAG_OFF(x)
#define DIAG_ON(x)
#endif
/* Use for clang specific pragmas, so we can keep -Wpragmas enabled */
#ifdef __clang__
# define DIAG_OFF_CLANG(x) DIAG_OFF(x)
# define DIAG_ON_CLANG(x) DIAG_ON(x)
#else
# define DIAG_OFF_CLANG(x)
# define DIAG_ON_CLANG(x)
#endif
/*
* Suppress complaints about conversion of size_t to int and about
* signed vs. unsigned comparison.
*
* XXX - this is done solely to squelch complaints from code generated
* by Flex, but newer versions of Flex might fix the code; can we
* check the version of Flex and suppress only the checks that code
* generated by that version of Flex triggers?
*/
#if defined(_MSC_VER)
/*
* Suppress:
*
* warning C4018: signed/unsigned mismatch
* warning C4267: 'argument' : conversion from 'size_t' to 'int', possible loss of data
*/
#define DIAG_OFF_FLEX \
__pragma(warning(push)) \
__pragma(warning(disable:4018)) \
__pragma(warning(disable:4267))
#define DIAG_ON_FLEX __pragma(warning(pop))
#else
/*
* Suppress:
*
* -Wsigned-compare warnings
* -Wshorten-64-to-32 warnings, if the compiler *has* -Wshorten-64-to-32
*
* We use DIAG_OFF() and DIAG_ON(), so we only use features that the
* compiler supports.
*
* We disable -Wshorten-64-to-32 if we're using Clang, or if __APPLE__
* is defined; that option was originally added to an Apple version of
* GCC, and at least some versions of Clang support it - given that
* the Clang work started at Apple, it may be in all versions of Clang.
*
* (Does no version of GCC or Clang support the same generic "you're
* narrowing a value, and you didn't throw in a cast to assert that
* you know what you're doing" warning that MSVC does?)
*/
#if defined(__clang__) || defined(__APPLE__)
#define DIAG_OFF_FLEX \
DIAG_OFF(sign-compare) \
DIAG_OFF(shorten-64-to-32)
#define DIAG_ON_FLEX \
DIAG_ON(shorten-64-to-32) \
DIAG_ON(sign-compare)
#else
#define DIAG_OFF_FLEX \
DIAG_OFF(sign-compare)
#define DIAG_ON_FLEX \
DIAG_ON(sign-compare)
#endif
#endif
/*
* For dealing with APIs which are only deprecated in macOS (like the
* OpenSSL and MIT/Heimdal Kerberos APIs).
*
* Dear Apple: this is a cross-platform program, and we're not
* going to use your Shiny New Frameworks on macOS unless there's
* a sufficiently clear benefit to make it worth our while to have
* both macOS and non-macOS versions of the code.
*/
#ifdef __APPLE__
# define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations)
# define USES_APPLE_RST DIAG_ON(deprecated-declarations)
#else
# define USES_APPLE_DEPRECATED_API
# define USES_APPLE_RST
#endif
#ifdef __cplusplus
}
#endif
#endif /* __WS_DIAG_CONTROL_H__ */
|
