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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
# -*- mode: python; -*-
#
# This is the principle SConscript file, invoked by the SConstruct. Its job is
# to delegate to any and all per-module SConscript files.
from functools import partial
from site_scons.mongo import insort_wrapper
import SCons
Import('dynamicRT')
Import('env')
Import('get_option')
Import('has_option')
Import('module_sconscripts')
def shim_hack(target, source, env, inject_target=None, exclusions=None):
if exclusions is None:
exclusions = set(inject_target)
elif isinstance(exclusions, str):
exclusions = {exclusions, inject_target}
elif isinstance(exclusions, (list, set)):
exclusions = set(exclusions)
exclusions.add(inject_target)
# If we allowed conftests to become dependent, any TryLink
# that happened after we made the below modifications would
# cause the configure steps to try to compile tcmalloc and any
# of its dependencies. Oops!
if any('conftest' in str(t) for t in target):
return target, source
# It is possible that 'env' isn't a unique
# OverrideEnvironment, since if you didn't pass any kw args
# into your builder call, you just reuse the env you were
# called with. That could mean that we see the same
# environment here multiple times. But that is really OK,
# since the operation we are performing would be performed on
# all of them anyway.
libdeps_no_inherit = set(env.get('LIBDEPS_NO_INHERIT', []))
exclusions.update(libdeps_no_inherit)
if f"$BUILD_DIR/{inject_target}" not in exclusions:
lds = env.get('LIBDEPS', [])
shim_target = f"$BUILD_DIR/{inject_target}"
if shim_target not in lds:
insort_wrapper(lds, shim_target)
env['LIBDEPS'] = lds
return target, source
def nodefaultlibs_hack(target, source, env):
if any('conftest' in str(t) for t in target):
return target, source
runtime_shim_names = [
'shim_crt',
'shim_cxx',
]
runtime_shims = [f"$BUILD_DIR/{name}" for name in runtime_shim_names]
# If we're building either the CRT or CXX shim, don't insert the
# nodefaultlibs argument because it makes static library insertion not work
# in clang and gcc.
if any(name in str(t) for name in runtime_shim_names for t in target):
return target, source
libdeps_no_inherit = set(env.get('LIBDEPS_NO_INHERIT', []))
if not any(shim in libdeps_no_inherit for shim in runtime_shims):
linkflags = env.get('LINKFLAGS', [])
if '-nodefaultlibs' not in linkflags:
linkflags = ['-nodefaultlibs'] + linkflags
env['LINKFLAGS'] = linkflags
return target, source
def hack_builder_emitters(env, hack_method):
for builder_name in ('Program', 'SharedLibrary', 'LoadableModule', 'StaticLibrary'):
builder = env['BUILDERS'][builder_name]
base_emitter = builder.emitter
builder.emitter = SCons.Builder.ListEmitter([hack_method, base_emitter])
# Here, we "hoist" libgcc*.a symbols out of the toolchain and stuff them into
# our own library so they don't get added piecemeal to every shared object and
# executable in a build directly out of the toolchain.
libcrtEnv = env.Clone(LIBS=[])
libcxxEnv = env.Clone(LIBS=[])
if dynamicRT == "force":
if env.ToolchainIs('gcc', 'clang'):
# Clang ang GCC get configured here because the dynamic runtimes are
# injected in ways that would not be fully applied to conftests. The
# only way to fix that means running part of the build before we can
# run conftests. It may be worth it to do that at some point, but it's
# complexity we should consider later if it's determined we need it.
hack_builder_emitters(env, nodefaultlibs_hack)
libcrtEnv.AppendUnique(
LINKFLAGS=[
"-Wl,-z,muldefs",
"-static-libgcc",
"-Wl,--push-state",
"-Wl,-Bstatic",
"-Wl,--no-warn-execstack",
"-Wl,--whole-archive",
"-lgcc",
"-lgcc_eh",
"-Wl,--no-whole-archive",
"-Wl,--pop-state",
],
SYSLIBDEPS=[
':libgcc_s.so',
]
)
if has_option("libc++"):
cxx_lib = "c++"
else:
cxx_lib = "stdc++"
libcxxEnv.AppendUnique(
LINKFLAGS=[
"-Wl,-z,muldefs",
f"-static-lib{cxx_lib}",
"-Wl,--push-state",
"-Wl,-Bstatic",
"-Wl,--no-warn-execstack",
"-Wl,--whole-archive",
f"-l{cxx_lib}",
"-Wl,--no-whole-archive",
"-Wl,--pop-state",
]
)
libcrtEnv.ShimLibrary(
name="crt",
needs_link=(dynamicRT == "force"),
LIBDEPS_TAGS=[
# TODO: Remove when SERVER-48291 is merged into stable build tools.
# An inserted dependency must be linked to every node, including what would
# be considered a leaf node to ensure that a system dependency is not linked
# in before this one. This tag allows nodes tagged as leaf nodes to still
# get the correct allocator.
'lint-leaf-node-allowed-dep',
# This tag allows this dependency to be linked to nodes marked as not
# allowed to have public dependencies.
'lint-public-dep-allowed'
]
)
libcxxEnv.ShimLibrary(
name="cxx",
needs_link=(dynamicRT == "force"),
LIBDEPS_TAGS=[
# TODO: Remove when SERVER-48291 is merged into stable build tools.
# An inserted dependency must be linked to every node, including what would
# be considered a leaf node to ensure that a system dependency is not linked
# in before this one. This tag allows nodes tagged as leaf nodes to still
# get the correct allocator.
'lint-leaf-node-allowed-dep',
# This tag allows this dependency to be linked to nodes marked as not
# allowed to have public dependencies.
'lint-public-dep-allowed'
]
)
if get_option("build-tools") == "next":
# Add any "global" dependencies here. This is where we make every build node
# depend on a list of other build nodes, such as an allocator or libunwind
# or libstdx or similar.
env.AppendUnique(
LIBDEPS_GLOBAL=[
'$BUILD_DIR/shim_crt' if dynamicRT == "force" else [],
'$BUILD_DIR/shim_cxx' if dynamicRT == "force" else [],
'$BUILD_DIR/third_party/shim_allocator',
],
)
else:
if dynamicRT == "force":
hack_builder_emitters(
env,
partial(
shim_hack,
inject_target='shim_crt'))
hack_builder_emitters(
env,
partial(
shim_hack,
inject_target='shim_cxx'))
hack_builder_emitters(
env,
partial(
shim_hack,
inject_target='third_party/shim_allocator',
exclusions='gperftools/gperftools'))
# NOTE: We must do third_party first as it adds methods to the environment
# that we need in the mongo sconscript
env.SConscript('third_party/SConscript', exports=['env'])
# Inject common dependencies from third_party globally for all core mongo code
# and modules. Ideally, pcre wouldn't be here, but enough things require it
# now that it seems hopeless to remove it.
env.InjectThirdParty(libraries=[
'abseil-cpp',
'boost',
'fmt',
'pcre',
'safeint',
'variant',
])
# Run the core mongodb SConscript.
env.SConscript('mongo/SConscript', exports=['env'])
# Run SConscripts for any modules in play
env.SConscript(module_sconscripts, exports=['env'])
|
