Build: make it possible to use ccache/sccache on windows

Also auto-detect the availability of sccache in setup.py.

1 files changed, 1 insertions, 0 deletions

diff --git a/BUILD.gn b/BUILD.gn
index c7251981d..5bb2d2ef2 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -5,6 +5,7 @@ import("//build_extra/flatbuffers/flatbuffer.gni")
 import("//build_extra/flatbuffers/rust/rust_flatbuffer.gni")
 import("//build_extra/deno.gni")
 import("//build_extra/rust/rust.gni")
+import("//build_extra/toolchain/validate.gni")
 
 group("default") {
   testonly = true