Update

[ghstack-poisoned]

Author: GregoryComer

setup.py

@@ -790,7 +790,7 @@ def run(self):  # noqa C901
     # platform-specific files using InstallerBuildExt.
     ext_modules=[
         BuiltFile(
-            src_dir="%CMAKE_CACHE_DIR%/third-party/flatc_proj/bin/",
+            src_dir="%CMAKE_CACHE_DIR%/third-party/flatc_ep/bin/",
             src_name="flatc",
             dst="executorch/data/bin/",
             is_executable=True,

third-party/CMakeLists.txt

@@ -34,8 +34,8 @@ endif()
 # Otherwise, flatc will target the project's toolchain (i.e. iOS, or Android).
 ExternalProject_Add(
   flatbuffers_ep
-  PREFIX ${CMAKE_CURRENT_BINARY_DIR}/flatc_proj
-  BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/flatc_proj/src/build
+  PREFIX ${CMAKE_CURRENT_BINARY_DIR}/flatc_ep
+  BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/flatc_ep/src/build
   SOURCE_DIR ${PROJECT_SOURCE_DIR}/third-party/flatbuffers
   CMAKE_ARGS -DFLATBUFFERS_BUILD_FLATC=ON
              -DFLATBUFFERS_INSTALL=ON