1 files changed, 65 insertions, 0 deletions
diff --git a/site_scons/site_tools/split_dwarf.py b/site_scons/site_tools/split_dwarf.py
new file mode 100644
index 00000000000..95130c9e9a3
--- /dev/null
+++ b/site_scons/site_tools/split_dwarf.py
@@ -0,0 +1,65 @@
+# Copyright 2017 MongoDB Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import SCons
+
+_splitDwarfFlag = '-gsplit-dwarf'
+
+# Cribbed from Tool/cc.py and Tool/c++.py. It would be better if
+# we could obtain this from SCons.
+_CSuffixes = ['.c']
+if not SCons.Util.case_sensitive_suffixes('.c', '.C'):
+    _CSuffixes.append('.C')
+
+_CXXSuffixes = ['.cpp', '.cc', '.cxx', '.c++', '.C++']
+if SCons.Util.case_sensitive_suffixes('.c', '.C'):
+    _CXXSuffixes.append('.C')
+
+def _dwo_emitter(target, source, env):
+    new_targets = []
+    for t in target:
+        base, ext = SCons.Util.splitext(str(t))
+        if not any(ext == env[osuffix] for osuffix in ['OBJSUFFIX', 'SHOBJSUFFIX']):
+            continue
+        # TODO: Move 'dwo' into DWOSUFFIX so it can be customized? For
+        # now, GCC doesn't let you control the output filename, so it
+        # doesn't matter.
+        dwotarget = (t.builder.target_factory or env.File)(base + ".dwo")
+        new_targets.append(dwotarget)
+    targets = target + new_targets
+    return (targets, source)
+
+def generate(env):
+    suffixes = []
+    if _splitDwarfFlag in env['CCFLAGS']:
+        suffixes = _CSuffixes + _CXXSuffixes
+    else:
+        if _splitDwarfFlag in env['CFLAGS']:
+            suffixes.extend(_CSuffixes)
+        if _splitDwarfFlag in env['CXXFLAGS']:
+            suffixes.extend(_CXXSuffixes)
+
+    for object_builder in SCons.Tool.createObjBuilders(env):
+        emitterdict = object_builder.builder.emitter
+        for suffix in emitterdict.iterkeys():
+            if not suffix in suffixes:
+                continue
+            base = emitterdict[suffix]
+            emitterdict[suffix] = SCons.Builder.ListEmitter([
+                base,
+                _dwo_emitter,
+            ])
+
+def exists(env):
+    return any(_splitDwarfFlag in env[f] for f in ['CCFLAGS', 'CFLAGS', 'CXXFLAGS'])