[Build] Bump vllm-flash-attn to C++20-compatible commit for torch-nightly (#49326)

Signed-off-by: Andrey Talman <atalman@fb.com>

Andrey Talman committed Jul 22, 2026 at 09:51 UTC c79ff5f91854b54a8e0cf225980b7b8ca4c52c3a
1 file changed +1 -1
cmake/external_projects/vllm_flash_attn.cmake
+1 -1
@@ -39,7 +39,7 @@ else()
39 FetchContent_Declare(
40 vllm-flash-attn
41 GIT_REPOSITORY https://github.com/vllm-project/flash-attention.git
42 - GIT_TAG 168920233059c48de6199e2cda74003b2ce3d199
42 + GIT_TAG ed4b7342bc8f0489dd9b649d5288867e35fc6a32
43 GIT_PROGRESS TRUE
44 # Don't share the vllm-flash-attn build between build types
45 BINARY_DIR ${CMAKE_BINARY_DIR}/vllm-flash-attn