Revert "Upgrade flatbuffers to 25.2.10"

alexreinking · alexreinking · commit 51324b9de5ac · 2025-08-03T08:18:32.000-04:00
This reverts commit 0a4ba1f.
diff --git a/.github/workflows/pip.yml b/.github/workflows/pip.yml
@@ -13,7 +13,7 @@ on:
 env:
   # TODO: detect this from repo somehow: https://github.com/halide/Halide/issues/8406
   LLVM_VERSION: 20.1.8
-  FLATBUFFERS_VERSION: 25.2.10
+  FLATBUFFERS_VERSION: 23.5.26
   WABT_VERSION: 1.0.36
 
 concurrency:
diff --git a/cmake/dependencies.cmake b/cmake/dependencies.cmake
@@ -3,7 +3,7 @@ include(FetchContent)
 FetchContent_Declare(
     flatbuffers
     GIT_REPOSITORY https://github.com/google/flatbuffers.git
-    GIT_TAG 1c514626e83c20fffa8557e75641848e1e15cd5e # v25.2.10
+    GIT_TAG 0100f6a5779831fa7a651e4b67ef389a8752bd9b # v23.5.26
     GIT_SHALLOW TRUE
 )
 
diff --git a/doc/BuildingHalideWithCMake.md b/doc/BuildingHalideWithCMake.md
@@ -145,7 +145,7 @@ building the core pieces of Halide.
 | [LLVM]        | _see policy below_ | _always_                   | WebAssembly and X86 targets are required.           |
 | [Clang]       | `==LLVM`           | _always_                   |                                                     |
 | [LLD]         | `==LLVM`           | _always_                   |                                                     |
-| [flatbuffers] | `~=25.2.10`        | `WITH_SERIALIZATION=ON`    |                                                     |
+| [flatbuffers] | `~=23.5.26`        | `WITH_SERIALIZATION=ON`    |                                                     |
 | [wabt]        | `==1.0.36`         | `Halide_WASM_BACKEND=wabt` | Does not have a stable API; exact version required. |
 | [V8]          | trunk              | `Halide_WASM_BACKEND=V8`   | Difficult to build. See [WebAssembly.md]            |
 | [Python]      | `>=3.9`            | `WITH_PYTHON_BINDINGS=ON`  |                                                     |
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -531,7 +531,7 @@ if (WITH_SERIALIZATION)
     # package in terms of the case of the relevant CMake files. Fortunately,
     # the IMPORTED targets appear to be consistently named `flatbuffers`.
     find_package(
-        flatbuffers 25.2.10 REQUIRED
+        flatbuffers 23.5.26 REQUIRED
         NAMES flatbuffers Flatbuffers FlatBuffers
     )
     _Halide_pkgdep(flatbuffers)

Original file line number	Diff line number	Diff line change
`@@ -3,7 +3,7 @@ include(FetchContent)`
`3`	`3`	`FetchContent_Declare(`
`4`	`4`	`flatbuffers`
`5`	`5`	`GIT_REPOSITORY https://github.com/google/flatbuffers.git`
`6`		`- GIT_TAG 1c514626e83c20fffa8557e75641848e1e15cd5e # v25.2.10`
	`6`	`+ GIT_TAG 0100f6a5779831fa7a651e4b67ef389a8752bd9b # v23.5.26`
`7`	`7`	`GIT_SHALLOW TRUE`
`8`	`8`	`)`
`9`	`9`
Original file line number	Diff line number	Diff line change
`@@ -531,7 +531,7 @@ if (WITH_SERIALIZATION)`
`531`	`531`	`# package in terms of the case of the relevant CMake files. Fortunately,`
`532`	`532`	# the IMPORTED targets appear to be consistently named `flatbuffers`.
`533`	`533`	`find_package(`
`534`		`- flatbuffers 25.2.10 REQUIRED`
	`534`	`+ flatbuffers 23.5.26 REQUIRED`
`535`	`535`	`NAMES flatbuffers Flatbuffers FlatBuffers`
`536`	`536`	`)`
`537`	`537`	`_Halide_pkgdep(flatbuffers)`