b6789115b7
git-svn-id: http://skia.googlecode.com/svn/trunk@4405 2bbb7eff-a529-9590-31e7-b0007b416f81
90 lines
3.4 KiB
Python
90 lines
3.4 KiB
Python
# Copyright 2012 The Android Open Source Project
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#
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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{
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# Get ready for the ugly...
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#
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# - We have to nest our variables dictionaries multiple levels deep, so that
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# this and other gyp files can rely on previously-set variable values in
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# their 'variables': { 'conditions': [] } clauses.
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#
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# Example 1:
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# Within this file, we use the value of variable 'skia_os' to set the
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# value of variable 'os_posix', so 'skia_os' must be defined within a
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# "more inner" (enclosed) scope than 'os_posix'.
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#
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# Example 2:
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# http://src.chromium.org/viewvc/chrome/trunk/src/third_party/libjpeg/libjpeg.gyp?revision=102306 ,
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# which we currently import into our build, uses the value of 'os_posix'
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# within the 'conditions' list in its 'variables' dict.
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# In order for that to work, it needs the value of 'os_posix' to have been
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# set within a "more inner" (enclosed) scope than its own 'variables' dict.
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#
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# - On the other hand, key/value pairs of a given 'variable' dict are only
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# inherited by:
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# 1. directly enclosing 'variable' dicts, and
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# 2. "sibling" 'variable' dicts (which, I guess, are combined into a single
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# 'variable' dict during gyp processing)
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# and NOT inherited by "uncles" (siblings of directly enclosing 'variable'
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# dicts), so we have to re-define every variable at every enclosure level
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# within our ridiculous matryoshka doll of 'variable' dicts. That's why
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# we have variable definitions like this: 'skia_os%': '<(skia_os)',
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#
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# See http://src.chromium.org/viewvc/chrome/trunk/src/build/common.gypi?revision=127004 ,
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# which deals with these same constraints in a similar manner.
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#
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'variables': { # level 1
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'variables': { # level 2
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# Variables needed by conditions list within the level-2 variables dict.
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'variables': { # level 3
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# We use 'skia_os' instead of 'OS' throughout our gyp files, to allow
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# for cross-compilation (e.g. building for either MacOS or iOS on Mac).
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# We set it automatically based on 'OS' (the host OS), but allow the
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# user to override it via GYP_DEFINES if they like.
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'skia_os%': '<(OS)',
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},
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# Re-define all variables defined within the level-3 'variables' dict,
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# so that siblings of the level-2 'variables' dict can see them.
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'skia_os%': '<(skia_os)',
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'conditions': [
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['skia_os == "win"', {
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'os_posix%': 0,
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}, {
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'os_posix%': 1,
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}],
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],
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'skia_scalar%': 'float',
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'skia_mesa%': 0,
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'skia_nv_path_rendering%': 0,
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# Do not turn on 'skia_angle' - it is currently experimental
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'skia_angle%': 0,
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'skia_arch_type%': 'x86',
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'skia_arch_width%': 32,
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'skia_debugger%': 'off',
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},
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# Re-define all variables defined within the level-2 'variables' dict,
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# so that siblings of the level-1 'variables' dict can see them.
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'skia_os%': '<(skia_os)',
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'os_posix%': '<(os_posix)',
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'skia_scalar%': '<(skia_scalar)',
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'skia_mesa%': '<(skia_mesa)',
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'skia_nv_path_rendering%': '<(skia_nv_path_rendering)',
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'skia_angle%': '<(skia_angle)',
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'skia_arch_type%': '<(skia_arch_type)',
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'skia_arch_width%': '<(skia_arch_width)',
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'skia_debugger%': '<(skia_debugger)',
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},
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}
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# Local Variables:
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# tab-width:2
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# indent-tabs-mode:nil
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# End:
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# vim: set expandtab tabstop=2 shiftwidth=2:
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