[DCU] add env vars to suppress build warnings

build_tools/pytorch.py

@@ -58,9 +58,34 @@ def setup_pytorch_extension(
             "-U__HIP_NO_BFLOAT16_CONVERSIONS__",
             "-U__HIP_NO_BFLOAT162_OPERATORS__",
             "-U__HIP_NO_BFLOAT162_CONVERSIONS__",
-            "-w",
             "-DUSE_ROCM",
         ]
+        if bool(int(os.getenv("NVTE_BUILD_SUPPRESS_UNUSED_WARNING", "1"))):
+            nvcc_flags.extend(
+                [
+                    "-Wno-unused-result",
+                    "-Wno-unused-function",
+                    "-Wno-unused-private-field",
+                    "-Wno-unused-variable",
+                ]
+            )
+            cxx_flags.extend(
+                [
+                    "-Wno-unused-result",
+                    "-Wno-unused-function",
+                    "-Wno-unused-private-field",
+                    "-Wno-unused-variable",
+                ]
+            )
+
+        if bool(int(os.getenv("NVTE_BUILD_SUPPRESS_RETURN_TYPE_WARNING", "0"))):
+            nvcc_flags.append("-Wno-return-type")
+            cxx_flags.append("-Wno-return-type")
+
+        if bool(int(os.getenv("NVTE_BUILD_SUPPRESS_SIGN_COMPARE", "0"))):
+            nvcc_flags.append("-Wno-sign-compare")
+            cxx_flags.append("-Wno-sign-compare")
+            
     else:
         nvcc_flags = [
             "-O3",

setup.py

@@ -64,6 +64,13 @@ def setup_common_extension() -> CMakeExtension:
     """Setup CMake extension for common library"""
     if rocm_build():
         cmake_flags = []
+        if bool(int(os.getenv("NVTE_BUILD_SUPPRESS_UNUSED_WARNING", "1"))):
+            cmake_flags.append("-DNVTE_BUILD_SUPPRESS_UNUSED_WARNING=ON")
+        if bool(int(os.getenv("NVTE_BUILD_SUPPRESS_RETURN_TYPE_WARNING", "0"))):
+            cmake_flags.append("-DNVTE_BUILD_SUPPRESS_RETURN_TYPE_WARNING=ON")
+        if bool(int(os.getenv("NVTE_BUILD_SUPPRESS_SIGN_COMPARE", "0"))):
+            cmake_flags.append("-DNVTE_BUILD_SUPPRESS_SIGN_COMPARE_WARNING=ON")
+            
     else:
         cmake_flags = ["-DCMAKE_CUDA_ARCHITECTURES={}".format(archs)]
     if bool(int(os.getenv("NVTE_UB_WITH_MPI", "0"))):

transformer_engine/common/CMakeLists.txt

@@ -340,6 +340,18 @@ if(USE_CUDA)
   set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} --expt-relaxed-constexpr")
   set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -O3")
 else()
+  option(NVTE_BUILD_SUPPRESS_UNUSED_WARNING "Suppress unused* wanings while build" ON)
+  option(NVTE_BUILD_SUPPRESS_RETURN_TYPE_WARNING "Suppress return type waning while build" OFF)
+  option(NVTE_BUILD_SUPPRESS_SIGN_COMPARE_WARNING "Suppress sign compare waning while build" OFF)
+  if(NVTE_BUILD_SUPPRESS_UNUSED_WARNING)
+    set(CMAKE_HIP_FLAGS "${CMAKE_HIP_FLAGS} -Wno-unused-result -Wno-unused-function -Wno-unused-private-field -Wno-unused-variable")
+  endif()
+  if(NVTE_BUILD_SUPPRESS_RETURN_TYPE_WARNING)
+    set(CMAKE_HIP_FLAGS "${CMAKE_HIP_FLAGS} -Wno-return-type")
+  endif()
+  if(NVTE_BUILD_SUPPRESS_SIGN_COMPARE_WARNING)
+    set(CMAKE_HIP_FLAGS "${CMAKE_HIP_FLAGS} -Wno-sign-compare")
+  endif()
   set(CMAKE_HIP_FLAGS "${CMAKE_HIP_FLAGS} -O3")
   set(HIP_HCC_FLAGS "${CMAKE_HIP_FLAGS} -mavx2 -mf16c -mfma -std=c++17")
   # Ask hcc to generate device code during compilation so we can use