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
|
# Copyright 2020 MongoDB Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
import SCons
import re
import subprocess
def exists(env):
if not "AR" in env:
return False
ar = env.subst(env["AR"])
if not ar:
return False
# If the user has done anything confusing with ARFLAGS, bail out. We want to find
# an item in ARFLAGS of the exact form 'rc'.
if not "rc" in env["ARFLAGS"]:
return False
pipe = SCons.Action._subproc(
env,
SCons.Util.CLVar(ar) + ["--version"],
stdin="devnull",
stderr="devnull",
stdout=subprocess.PIPE,
)
if pipe.wait() != 0:
return False
found = False
for line in pipe.stdout:
if found:
continue # consume all data
found = re.search(r"^GNU ar|^LLVM", line.decode("utf-8"))
return bool(found)
def _add_emitter(builder):
base_emitter = builder.emitter
def new_emitter(target, source, env):
for t in target:
setattr(t.attributes, "thin_archive", True)
return (target, source)
new_emitter = SCons.Builder.ListEmitter([base_emitter, new_emitter])
builder.emitter = new_emitter
def _add_scanner(builder):
old_scanner = builder.target_scanner
path_function = old_scanner.path_function
def new_scanner(node, env, path):
old_results = old_scanner(node, env, path)
# Ninja uses only timestamps for implicit dependencies so will
# always rebuild a program whose archive has been updated even
# if has the same content signature.
if env.get("GENERATING_NINJA", False):
return old_results
new_results = []
for base in old_results:
new_results.append(base)
if getattr(env.Entry(base).attributes, "thin_archive", None):
new_results.extend(base.children())
return new_results
builder.target_scanner = SCons.Scanner.Scanner(
function=new_scanner,
path_function=path_function,
)
def generate(env):
if not exists(env):
return
env["ARFLAGS"] = SCons.Util.CLVar(
[arflag if arflag != "rc" else "rcsTD" for arflag in env["ARFLAGS"]])
# Disable running ranlib, since we added 's' above
env["RANLIBCOM"] = ""
env["RANLIBCOMSTR"] = "Skipping ranlib for thin archive $TARGET"
for builder in ["StaticLibrary", "SharedArchive"]:
_add_emitter(env["BUILDERS"][builder])
for builder in ["SharedLibrary", "LoadableModule", "Program"]:
_add_scanner(env["BUILDERS"][builder])
|
