blob: 80ee0788abf698d8b97ef0acf7524f9ef51b2bc3 (
plain)
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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
# Copyright (c) 2011 WorkWare Systems http://www.workware.net.au/
# All rights reserved
# @synopsis:
#
# Provides a library of common tests on top of the 'cc' module.
use cc
module-options {}
# @cc-check-lfs
#
# The equivalent of the 'AC_SYS_LARGEFILE' macro.
#
# defines 'HAVE_LFS' if LFS is available,
# and defines '_FILE_OFFSET_BITS=64' if necessary
#
# Returns 1 if 'LFS' is available or 0 otherwise
#
proc cc-check-lfs {} {
cc-check-includes sys/types.h
msg-checking "Checking if -D_FILE_OFFSET_BITS=64 is needed..."
set lfs 1
if {[msg-quiet cc-with {-includes sys/types.h} {cc-check-sizeof off_t}] == 8} {
msg-result no
} elseif {[msg-quiet cc-with {-includes sys/types.h -cflags -D_FILE_OFFSET_BITS=64} {cc-check-sizeof off_t}] == 8} {
define _FILE_OFFSET_BITS 64
msg-result yes
} else {
set lfs 0
msg-result none
}
define-feature lfs $lfs
return $lfs
}
# @cc-check-endian
#
# The equivalent of the 'AC_C_BIGENDIAN' macro.
#
# defines 'HAVE_BIG_ENDIAN' if endian is known to be big,
# or 'HAVE_LITTLE_ENDIAN' if endian is known to be little.
#
# Returns 1 if determined, or 0 if not.
#
proc cc-check-endian {} {
cc-check-includes sys/types.h sys/param.h
set rc 0
msg-checking "Checking endian..."
cc-with {-includes {sys/types.h sys/param.h}} {
if {[cctest -code {
#if !defined(BIG_ENDIAN) || !defined(BYTE_ORDER)
#error unknown
#elif BYTE_ORDER != BIG_ENDIAN
#error little
#endif
}]} {
define-feature big-endian
msg-result "big"
set rc 1
} elseif {[cctest -code {
#if !defined(LITTLE_ENDIAN) || !defined(BYTE_ORDER)
#error unknown
#elif BYTE_ORDER != LITTLE_ENDIAN
#error big
#endif
}]} {
define-feature little-endian
msg-result "little"
set rc 1
} else {
msg-result "unknown"
}
}
return $rc
}
# @cc-check-flags flag ?...?
#
# Checks whether the given C/C++ compiler flags can be used. Defines feature
# names prefixed with 'HAVE_CFLAG' and 'HAVE_CXXFLAG' respectively, and
# appends working flags to '-cflags' and 'CFLAGS' or 'CXXFLAGS'.
proc cc-check-flags {args} {
set result 1
array set opts [cc-get-settings]
switch -exact -- $opts(-lang) {
c++ {
set lang C++
set prefix CXXFLAG
}
c {
set lang C
set prefix CFLAG
}
default {
autosetup-error "cc-check-flags failed with unknown language: $opts(-lang)"
}
}
foreach flag $args {
msg-checking "Checking whether the $lang compiler accepts $flag..."
if {[cctest -cflags $flag]} {
msg-result yes
define-feature $prefix$flag
cc-with [list -cflags [list $flag]]
define-append ${prefix}S $flag
} else {
msg-result no
set result 0
}
}
return $result
}
# @cc-check-standards ver ?...?
#
# Checks whether the C/C++ compiler accepts one of the specified '-std=$ver'
# options, and appends the first working one to '-cflags' and 'CFLAGS' or
# 'CXXFLAGS'.
proc cc-check-standards {args} {
array set opts [cc-get-settings]
foreach std $args {
if {[cc-check-flags -std=$std]} {
return $std
}
}
return ""
}
# Checks whether $keyword is usable as alignof
proc cctest_alignof {keyword} {
msg-checking "Checking for $keyword..."
if {[cctest -code "int x = ${keyword}(char), y = ${keyword}('x');"]} then {
msg-result ok
define-feature $keyword
} else {
msg-result "not found"
}
}
# @cc-check-c11
#
# Checks for several C11/C++11 extensions and their alternatives. Currently
# checks for '_Static_assert', '_Alignof', '__alignof__', '__alignof'.
proc cc-check-c11 {} {
msg-checking "Checking for _Static_assert..."
if {[cctest -code {
_Static_assert(1, "static assertions are available");
}]} then {
msg-result ok
define-feature _Static_assert
} else {
msg-result "not found"
}
cctest_alignof _Alignof
cctest_alignof __alignof__
cctest_alignof __alignof
}
# @cc-check-alloca
#
# The equivalent of the 'AC_FUNC_ALLOCA' macro.
#
# Checks for the existence of 'alloca'
# defines 'HAVE_ALLOCA' and returns 1 if it exists.
proc cc-check-alloca {} {
cc-check-some-feature alloca {
cctest -includes alloca.h -code { alloca (2 * sizeof (int)); }
}
}
# @cc-signal-return-type
#
# The equivalent of the 'AC_TYPE_SIGNAL' macro.
#
# defines 'RETSIGTYPE' to 'int' or 'void'.
proc cc-signal-return-type {} {
msg-checking "Checking return type of signal handlers..."
cc-with {-includes {sys/types.h signal.h}} {
if {[cctest -code {return *(signal (0, 0)) (0) == 1;}]} {
set type int
} else {
set type void
}
define RETSIGTYPE $type
msg-result $type
}
}
|
