Flutter engine build diff for ML training https://github.com/google/ml-compiler-opt/blob/main/docs/demo/demo.md

ml_build_train.diff

diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 4998a7343..29a07cbfe 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -904,6 +904,7 @@ config("optimize") {
   }
   ldflags = common_optimize_on_ldflags + lto_flags
   cflags += lto_flags
+  cflags += ["-Xclang", "-fembed-bitcode=all"]
 }

 # Turn off optimizations.
diff --git a/build/toolchain/android/BUILD.gn b/build/toolchain/android/BUILD.gn
index 3bc51d3ab..48b932694 100644
--- a/build/toolchain/android/BUILD.gn
+++ b/build/toolchain/android/BUILD.gn
@@ -56,7 +56,7 @@ template("android_gcc_toolchain") {
         assert(false, "Unknown host")
       }

-      prefix = rebase_path("//buildtools/$host_dir/clang/bin", root_build_dir)
+      prefix = "/usr/local/google/home/liyuqian/ml/llvm-install/bin" # rebase_path("//clang-tf-arm64/bin", root_build_dir)

       cc = compiler_prefix + prefix + "/clang"
       cxx = compiler_prefix + prefix + "/clang++"
diff --git a/build/toolchain/linux/BUILD.gn b/build/toolchain/linux/BUILD.gn
index b345f54f3..706369a73 100644
--- a/build/toolchain/linux/BUILD.gn
+++ b/build/toolchain/linux/BUILD.gn
@@ -36,7 +36,7 @@ gcc_toolchain("clang_x86") {
     prefix = rebase_path("//third_party/llvm-allocated-type/Linux_ia32/bin",
                          root_build_dir)
   } else {
-    prefix = rebase_path("//buildtools/linux-x64/clang/bin", root_build_dir)
+    prefix = "/usr/local/google/home/liyuqian/ml/llvm-install/bin" # prefix = rebase_path("//clang-tf-arm64/bin", root_build_dir)
   }
   cc = "${compiler_prefix}$prefix/clang"
   cxx = "${compiler_prefix}$prefix/clang++"
@@ -73,7 +73,7 @@ gcc_toolchain("clang_x64") {
     prefix = rebase_path("//third_party/llvm-allocated-type/Linux_x64/bin",
                          root_build_dir)
   } else {
-    prefix = rebase_path("//buildtools/linux-x64/clang/bin", root_build_dir)
+    prefix = "/usr/local/google/home/liyuqian/ml/llvm-install/bin" #  rebase_path("//clang-tf-arm64/bin", root_build_dir)
   }
   cc = "${compiler_prefix}$prefix/clang"
   cxx = "${compiler_prefix}$prefix/clang++"
@@ -94,7 +94,7 @@ gcc_toolchain("clang_arm64") {
     prefix = rebase_path("//third_party/llvm-allocated-type/Linux_x64/bin",
                          root_build_dir)
   } else {
-    prefix = rebase_path("//buildtools/linux-x64/clang/bin", root_build_dir)
+    prefix = "/usr/local/google/home/liyuqian/ml/llvm-install/bin" # rebase_path("//clang-tf-arm64/bin", root_build_dir)
   }
   cc = "${compiler_prefix}$prefix/clang"
   cxx = "${compiler_prefix}$prefix/clang++"