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
190
191
192
193
194
195
196
197
198
199
200
201
202
|
# Copyright Rene Rivera 2015
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
# Defines rules that provide requirements based on checking
# conditions using Boost Predef definitions and version numbers.
import modules ;
import project ;
import feature ;
import string ;
import toolset ;
import modules ;
import path ;
import "class" : new ;
import regex ;
# Create a project for our targets.
project.extension predef check ;
# Feature to pass check expressions to check programs.
feature.feature predef-expression : : free ;
# Checks the expressions and when used evaluates to the true-properties
# if the expressions are all true. Otherwise evaluates to the
# false-properties.
rule check ( expressions + : language ? : true-properties * : false-properties * )
{
# Default to C++ on the check context.
language ?= cpp ;
local project_target = [ project.target $(__name__) ] ;
project.push-current $(project_target) ;
local terms ;
local result ;
for expression in $(expressions)
{
if $(expression:L) in "and" "or"
{
terms += $(expression:L) ;
}
else
{
# Create the check run if we don't have one yet.
local key = [ MD5 "$(language)::$(expression)" ] ;
if ! ( $(key) in $(_checks_) )
{
_checks_ += $(key) ;
_message_(/check/predef//predef_check_cc_$(key)) = $(expression) ;
check_target $(language) $(key) : [ change_term_to_def $(expression) ] ;
}
terms += /check/predef//predef_check_cc_$(key) ;
}
}
local instance = [ new check-expression-evaluator
$(terms) : $(true-properties) : $(false-properties) ] ;
result = <conditional>@$(instance).check ;
project.pop-current ;
return $(result) ;
}
# Checks the expressions and when used evaluates to <build>no
# if the expressions are all false. Otherwise evaluates to the
# nothing.
rule require ( expressions + : language ? )
{
return [ check $(expressions) : $(language) : : <build>no ] ;
}
#############################################################################
.c.ext = c ;
.cpp.ext = cpp ;
.objc.ext = m ;
.objcpp.ext = mm ;
# Check targets. Each needs to be compiled for different languages
# even though they are all the same source code.
local rule check_target ( language key : requirements * )
{
# Need to use absolute paths because we don't know the
# context of the invocation which affects where the paths
# originate from.
local predef_jam
= [ modules.binding $(__name__) ] ;
local source_path
= $(predef_jam:D)/predef_check_cc_as_$(language).$(.$(language).ext) ;
local include_path
= $(predef_jam:D)/../../include $(BOOST_ROOT) ;
obj predef_check_cc_$(key)
: $(source_path)
: <include>$(include_path) $(requirements) ;
explicit predef_check_cc_$(key) ;
return predef_check_cc_$(key) ;
}
local rule change_term_to_def ( term )
{
local parts = [ regex.split $(term) " " ] ;
if $(parts[3])
{
local version_number = [ regex.split $(parts[3]) "[.]" ] ;
if ! $(version_number[2]) { version_number += "0" ; }
if ! $(version_number[3]) { version_number += "0" ; }
parts = $(parts[1-2]) BOOST_VERSION_NUMBER($(version_number:J=",")) ;
}
return <define>CHECK=\"$(parts:J=" ")\" ;
}
class check-expression-evaluator
{
import configure ;
rule __init__ ( expression + : true-properties * : false-properties * )
{
self.expression = $(expression) ;
self.true-properties = $(true-properties) ;
self.false-properties = $(false-properties) ;
}
rule check ( properties * )
{
local to-eval ;
local tokens = "and" "or" ;
# Go through the expression and: eval the target values,
# and normalize to a full expression.
for local term in $(self.expression)
{
if ! ( $(term:L) in $(tokens) )
{
# A value is a target reference that will evan to "true"
# or "false".
if $(to-eval[-1]:L) && ! ( $(to-eval[-1]:L) in $(tokens) )
{
# Default to "and" operation.
to-eval += "and" ;
}
local message = [ modules.peek predef : _message_($(term)) ] ;
if [ configure.builds $(term) : $(properties) : $(message) ]
{
to-eval += "true" ;
}
else
{
to-eval += "false" ;
}
}
else
{
to-eval += $(term) ;
}
}
# Eval full the expression.
local eval-result = [ eval $(to-eval) ] ;
# And resolve true/false properties.
if $(eval-result) = "true"
{
return $(self.true-properties) ;
}
else
{
return $(self.false-properties) ;
}
}
rule eval ( e * )
{
local r ;
if $(e[1]) && $(e[2]) && $(e[3])
{
if $(e[2]) = "and"
{
if $(e[1]) = "true" && $(e[3]) = "true"
{
r = [ eval "true" $(e[4-]) ] ;
}
else
{
r = [ eval "false" $(e[4-]) ] ;
}
}
else if $(e[2]) = "or"
{
if $(e[1]) = "true" || $(e[3]) = "true"
{
r = [ eval "true" $(e[4-]) ] ;
}
else
{
r = [ eval "false" $(e[4-]) ] ;
}
}
}
else
{
r = $(e[1]) ;
}
return $(r) ;
}
}
|
