diff --git a/BUCK b/BUCK
index fd87a83b..4b809f69 100644
--- a/BUCK
+++ b/BUCK
@@ -2,8 +2,7 @@
 #
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
-
-load("//:yoga_defs.bzl", "BASE_COMPILER_FLAGS", "GTEST_TARGET", "LIBRARY_COMPILER_FLAGS", "yoga_cxx_library", "yoga_cxx_test", "yoga_dep")
+load("//:yoga_defs.bzl", "BASE_COMPILER_FLAGS", "GTEST_TARGET", "LIBRARY_COMPILER_FLAGS", "subdir_glob", "yoga_cxx_library", "yoga_cxx_test", "yoga_dep")
 
 GMOCK_OVERRIDE_FLAGS = [
     # gmock does not mark mocked methods as override, ignore the warnings in tests
diff --git a/YogaKit/BUCK b/YogaKit/BUCK
index 14198edb..9675d049 100644
--- a/YogaKit/BUCK
+++ b/YogaKit/BUCK
@@ -2,8 +2,7 @@
 #
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
-
-load("//:yoga_defs.bzl", "yoga_apple_library", "yoga_apple_test", "yoga_dep")
+load("//:yoga_defs.bzl", "subdir_glob", "yoga_apple_library", "yoga_apple_test", "yoga_dep")
 
 COMPILER_FLAGS = [
     "-fobjc-arc",
diff --git a/benchmark/BUCK b/benchmark/BUCK
index 2b30af78..82864373 100644
--- a/benchmark/BUCK
+++ b/benchmark/BUCK
@@ -2,8 +2,7 @@
 #
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
-
-load("//:yoga_defs.bzl", "yoga_cxx_binary", "yoga_dep")
+load("//:yoga_defs.bzl", "subdir_glob", "yoga_cxx_binary", "yoga_dep")
 
 yoga_cxx_binary(
     name = "benchmark",
diff --git a/lib/fb/BUCK b/lib/fb/BUCK
index e72c3cb6..cc2502ec 100644
--- a/lib/fb/BUCK
+++ b/lib/fb/BUCK
@@ -2,8 +2,7 @@
 #
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
-
-load("//:yoga_defs.bzl", "ANDROID", "FBJNI_JAVA_TARGET", "JNI_TARGET", "YOGA_ROOTS", "yoga_cxx_library", "yoga_prebuilt_cxx_library")
+load("//:yoga_defs.bzl", "ANDROID", "FBJNI_JAVA_TARGET", "JNI_TARGET", "YOGA_ROOTS", "subdir_glob", "yoga_cxx_library", "yoga_prebuilt_cxx_library")
 
 yoga_prebuilt_cxx_library(
     name = "ndklog",
diff --git a/lib/gtest/BUCK b/lib/gtest/BUCK
index 167d70eb..e489c69c 100644
--- a/lib/gtest/BUCK
+++ b/lib/gtest/BUCK
@@ -2,8 +2,7 @@
 #
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
-
-load("//:yoga_defs.bzl", "YOGA_ROOTS", "yoga_cxx_library")
+load("//:yoga_defs.bzl", "YOGA_ROOTS", "subdir_glob", "yoga_cxx_library")
 
 COMPILER_FLAGS = [
     "-std=c++11",
diff --git a/yoga_defs.bzl b/yoga_defs.bzl
index c6d7120a..9f33a825 100644
--- a/yoga_defs.bzl
+++ b/yoga_defs.bzl
@@ -59,6 +59,87 @@ LIBRARY_COMPILER_FLAGS = BASE_COMPILER_FLAGS + [
     "-fPIC",
 ]
 
+def _paths_join(path, *others):
+  """Joins one or more path components."""
+  result = path
+
+  for p in others:
+    if p.startswith("/"):  # absolute
+      result = p
+    elif not result or result.endswith("/"):
+      result += p
+    else:
+      result += "/" + p
+
+  return result
+
+def subdir_glob(glob_specs, exclude = None, prefix = ""):
+    """Returns a dict of sub-directory relative paths to full paths.
+
+    The subdir_glob() function is useful for defining header maps for C/C++
+    libraries which should be relative the given sub-directory.
+    Given a list of tuples, the form of (relative-sub-directory, glob-pattern),
+    it returns a dict of sub-directory relative paths to full paths.
+
+    Please refer to native.glob() for explanations and examples of the pattern.
+
+    Args:
+      glob_specs: The array of tuples in form of
+        (relative-sub-directory, glob-pattern inside relative-sub-directory).
+        type: List[Tuple[str, str]]
+      exclude: A list of patterns to identify files that should be removed
+        from the set specified by the first argument. Defaults to [].
+        type: Optional[List[str]]
+      prefix: If is not None, prepends it to each key in the dictionary.
+        Defaults to None.
+        type: Optional[str]
+
+    Returns:
+      A dict of sub-directory relative paths to full paths.
+    """
+    if exclude == None:
+        exclude = []
+
+    results = []
+
+    for dirpath, glob_pattern in glob_specs:
+        results.append(
+            _single_subdir_glob(dirpath, glob_pattern, exclude, prefix),
+        )
+
+    return _merge_maps(*results)
+
+def _merge_maps(*file_maps):
+    result = {}
+    for file_map in file_maps:
+        for key in file_map:
+            if key in result and result[key] != file_map[key]:
+                fail(
+                    "Conflicting files in file search paths. " +
+                    "\"%s\" maps to both \"%s\" and \"%s\"." %
+                    (key, result[key], file_map[key]),
+                )
+
+            result[key] = file_map[key]
+
+    return result
+
+def _single_subdir_glob(dirpath, glob_pattern, exclude = None, prefix = None):
+    if exclude == None:
+        exclude = []
+    results = {}
+    files = native.glob([_paths_join(dirpath, glob_pattern)], exclude = exclude)
+    for f in files:
+        if dirpath:
+            key = f[len(dirpath) + 1:]
+        else:
+            key = f
+        if prefix:
+            key = _paths_join(prefix, key)
+        results[key] = f
+
+    return results
+
 def yoga_dep(dep):
     return "//" + dep