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comparison dw.h @ 2163:98db0e81a514

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Rewrite the Compiler detection tests for deprecation and unused. Simplify and make more safe, clang or compilers supporting __has_extension() and __has_attribute() should work perfectly. There are now GCC version tests for all these features, however there seems to be some disagreement online about which GCC versions introduced these features, so I picked the versions that I felt had the highest consensus. Can revisit the specific versions if new information is available: unused attribute: GCC 3.1 (BSD seems to think 2.7) deprecated attribute: GCC 3.2 (Hedley seems to think 4.0) deprecated with message attribute: GCC 4.5
author bsmith@81767d24-ef19-dc11-ae90-00e081727c95
date Wed, 30 Sep 2020 19:34:17 +0000
parents 48172881415c
children f98cecae5402
comparison
equal deleted inserted replaced
2162:a3f105431028 2163:98db0e81a514
13 #define DW_SUB_VERSION 0 13 #define DW_SUB_VERSION 0
14 14
15 #define DW_HOME_URL "http://dwindows.netlabs.org" 15 #define DW_HOME_URL "http://dwindows.netlabs.org"
16 16
17 /* Support for API deprecation in supported compilers */ 17 /* Support for API deprecation in supported compilers */
18 #if defined(__has_feature) && !defined(__has_extension) 18 #ifndef __has_attribute
19 #define __has_extension __has_feature 19 # define __has_attribute(x) 0
20 #endif
21
22 #ifndef __has_extension
23 # define __has_extension __has_feature
24 #endif
25
26 #ifndef __has_feature
27 # define __has_feature(x) 0
28 #endif
29
30 #ifndef __GNUC_PREREQ
31 # if defined(__GNUC__) && defined(__GNUC_MINOR__)
32 # define __GNUC_PREREQ(maj, min) ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
33 # else
34 # define __GNUC_PREREQ(maj, min) 0
35 # endif
20 #endif 36 #endif
21 37
22 /* Visual C */ 38 /* Visual C */
23 #if defined(_MSC_VER) 39 #if defined(_MSC_VER)
24 # if _MSC_VER >= 1400 40 # if _MSC_VER >= 1400
25 # define DW_DEPRECATED(func, message) __declspec(deprecated(message)) func 41 # define DW_DEPRECATED(func, message) __declspec(deprecated(message)) func
26 # endif 42 # endif
27 /* Clang */ 43 /* Clang or GCC */
28 #elif defined(__clang__) && defined(__has_extension) 44 #elif __has_extension(attribute_deprecated_with_message) || __GNUC_PREREQ(4, 5)
29 # if __has_extension(attribute_deprecated_with_message) 45 # define DW_DEPRECATED(func, message) func __attribute__((deprecated (message)))
30 # define DW_DEPRECATED(func, message) func __attribute__ ((deprecated (message))) 46 #elif __has_extension(attribute_deprecated) || __GNUC_PREREQ(3, 2)
31 # else 47 # define DW_DEPRECATED(func, message) func __attribute__((deprecated))
32 # define DW_DEPRECATED(func, message) func __attribute__ ((deprecated))
33 # endif
34 /* GCC */
35 #elif defined(__GNUC__)
36 # if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= 40500
37 # define DW_DEPRECATED(func, message) func __attribute__ ((deprecated (message)))
38 # else
39 # define DW_DEPRECATED(func, message) func __attribute__ ((deprecated))
40 # endif
41 #endif 48 #endif
42 49
43 /* Compiler without deprecation support */ 50 /* Compiler without deprecation support */
44 #ifndef DW_DEPRECATED 51 #ifndef DW_DEPRECATED
45 #define DW_DEPRECATED(func, message) func 52 #define DW_DEPRECATED(func, message) func
46 #endif 53 #endif
47 54
48 /* Support for unused variables in supported compilers */ 55 /* Support for unused variables in supported compilers */
49 #if defined(__GNUC__) || (defined(__clang__) && defined(__has_extension)) 56 #if __has_attribute(unused) || __GNUC_PREREQ(3, 1)
50 #define DW_UNUSED(x) x __attribute__((__unused__)) 57 #define DW_UNUSED(x) x __attribute__((__unused__))
51 #else 58 #else
52 #define DW_UNUSED(x) x 59 #define DW_UNUSED(x) x
53 #endif 60 #endif
54 61