SConscript

# -*- 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.


Import("env")
Import("module_sconscripts")
Import("use_libunwind")

env = env.Clone()

# 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=[
        "$BUILD_DIR/third_party/gperftools/tcmalloc_minimal"
        if env["MONGO_ALLOCATOR"] in ["tcmalloc-gperftools"]
        else [],
        "$BUILD_DIR/third_party/tcmalloc/tcmalloc"
        if env["MONGO_ALLOCATOR"] in ["tcmalloc-google"]
        else [],
        "$BUILD_DIR/third_party/unwind/unwind" if use_libunwind else [],
    ],
)

# 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", must_exist=1, exports=["env"])

# Ensure our subsequent modifications are not shared with the
# third_party env. Normally that SConscript would have done a clone,
# so handled that isolation itself, but it doesn't since it needs to
# alter the env in ways that we need to use up here.
env = env.Clone()

# Inject common dependencies from third_party globally for all core mongo code
# and modules.
env.InjectThirdParty(
    libraries=[
        "abseil-cpp",
        "boost",
        "croaring",
        "fmt",
        "immer",
        "tomcrypt_md5",
        "murmurhash3",
        "safeint",
        "stemmer",
        "variant",
    ]
)

# It would be somewhat better if this could be applied down in
# `src/mongo/SConscript`, since the goal of doing it here rather than
# up in SConstruct is to only enforce this rule for code that we wrote
# and exclude third party sources. However, doing it in
# `src/mongo/SConscript`` would also exclude applying it for modules,
# and we do want this enabled for enterprise.

if env.ToolchainIs("gcc"):
    # With GCC, use the implicit fallthrough flag variant that doesn't
    # care about your feeble attempts to use comments to explain yourself.
    env.AddToCCFLAGSIfSupported("-Wimplicit-fallthrough=5")
elif env.ToolchainIs("clang"):
    env.AddToCCFLAGSIfSupported("-Wimplicit-fallthrough")

# Run the core mongodb SConscript.
env.SConscript("mongo/SConscript", must_exist=1, exports=["env"])

# Run SConscripts for any modules in play
env.SConscript(module_sconscripts, must_exist=1, exports=["env"])