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
|
# Copyright 2012 The Android Open Source Project
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
{
# Get ready for the ugly...
#
# - We have to nest our variables dictionaries multiple levels deep, so that
# this and other gyp files can rely on previously-set variable values in
# their 'variables': { 'conditions': [] } clauses.
#
# Example 1:
# Within this file, we use the value of variable 'skia_os' to set the
# value of variable 'os_posix', so 'skia_os' must be defined within a
# "more inner" (enclosed) scope than 'os_posix'.
#
# Example 2:
# http://src.chromium.org/viewvc/chrome/trunk/src/third_party/libjpeg/libjpeg.gyp?revision=102306 ,
# which we currently import into our build, uses the value of 'os_posix'
# within the 'conditions' list in its 'variables' dict.
# In order for that to work, it needs the value of 'os_posix' to have been
# set within a "more inner" (enclosed) scope than its own 'variables' dict.
#
# - On the other hand, key/value pairs of a given 'variable' dict are only
# inherited by:
# 1. directly enclosing 'variable' dicts, and
# 2. "sibling" 'variable' dicts (which, I guess, are combined into a single
# 'variable' dict during gyp processing)
# and NOT inherited by "uncles" (siblings of directly enclosing 'variable'
# dicts), so we have to re-define every variable at every enclosure level
# within our ridiculous matryoshka doll of 'variable' dicts. That's why
# we have variable definitions like this: 'skia_os%': '<(skia_os)',
#
# See http://src.chromium.org/viewvc/chrome/trunk/src/build/common.gypi?revision=127004 ,
# which deals with these same constraints in a similar manner.
#
'variables': { # level 1
'variables': { # level 2
# Variables needed by conditions list within the level-2 variables dict.
'variables': { # level 3
# We use 'skia_os' instead of 'OS' throughout our gyp files, to allow
# for cross-compilation (e.g. building for either MacOS or iOS on Mac).
# We set it automatically based on 'OS' (the host OS), but allow the
# user to override it via GYP_DEFINES if they like.
'skia_os%': '<(OS)',
},
# Re-define all variables defined within the level-3 'variables' dict,
# so that siblings of the level-2 'variables' dict can see them.
'skia_os%': '<(skia_os)',
'conditions': [
['skia_os == "win"', {
'os_posix%': 0,
}, {
'os_posix%': 1,
}],
],
'skia_scalar%': 'float',
'skia_mesa%': 0,
# Do not turn on 'skia_angle' - it is currently experimental
'skia_angle%': 0,
'skia_target_arch%': 'x86',
},
# Re-define all variables defined within the level-2 'variables' dict,
# so that siblings of the level-1 'variables' dict can see them.
'skia_os%': '<(skia_os)',
'os_posix%': '<(os_posix)',
'skia_scalar%': '<(skia_scalar)',
'skia_mesa%': '<(skia_mesa)',
'skia_angle%': '<(skia_angle)',
'skia_target_arch%': '<(skia_target_arch)',
},
}
# Local Variables:
# tab-width:2
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=2 shiftwidth=2:
|
