--- a/CMakeLists.txt	2025-11-28 15:21:02.358311416 +0100
+++ b/CMakeLists.txt	2025-11-28 15:23:55.035916716 +0100
@@ -248,9 +248,20 @@
         "find_dependency(CUDAToolkit ${CUDAToolkit_VERSION})")
       enable_language(CUDA)
       if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.18")
-        # Support Maxwell, Pascal, Volta, Turing, and Ampere GPUs.
-        set(CMAKE_CUDA_ARCHITECTURES "50;60;70;80")
-        message("-- Setting CUDA Architecture to ${CMAKE_CUDA_ARCHITECTURES}")
+      # Support Maxwell, Pascal, Volta, Turing, and Ampere GPUs.
+      # CUDA 13.0+ has removed support for compute_50/60/70.
+      # Force only modern archs compatible with Ampere+.
+      set(CMAKE_CUDA_ARCHITECTURES "80;86;89;90;120")
+      message("-- [Gentoo] Overriding CUDA Archs for CUDA 13: ${CMAKE_CUDA_ARCHITECTURES}")
+
+      # Force NVCC to allow GCC > 14 (unsupported officially)
+      add_compile_options($<$<COMPILE_LANGUAGE:CUDA>:--allow-unsupported-compiler>)
+
+      # Avoid legacy PTX generation errors
+      set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -Xptxas --disable-warnings")
+
+      # Avoid compile errors on sm_80 + CUTLASS kernels
+      set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -Xcompiler -Wno-error=deprecated-declarations")
       endif()
       list(APPEND CERES_CUDA_LIBRARIES
         CUDA::cublas