remove hardcoded -Wunused-variable compiler flags (#47706)

paddle/fluid/eager/api/manual/eager_manual/forwards/add_n_fwd_func.cc

@@ -20,7 +20,6 @@
 #include "paddle/fluid/eager/nan_inf_utils.h"
 #include "paddle/fluid/platform/profiler/event_tracing.h"
 
-#pragma GCC diagnostic ignored "-Wunused-variable"
 DECLARE_bool(check_nan_inf);
 
 paddle::experimental::Tensor add_n_ad_func(

paddle/fluid/eager/api/manual/eager_manual/forwards/conv2d_fwd_function.cc

@@ -21,7 +21,6 @@
 #include "paddle/fluid/eager/nan_inf_utils.h"
 #include "paddle/fluid/platform/profiler/event_tracing.h"
 
-#pragma GCC diagnostic ignored "-Wunused-variable"
 DECLARE_bool(check_nan_inf);
 
 paddle::experimental::Tensor conv2d_ad_func(

paddle/fluid/eager/api/manual/fluid_manual/forwards/fused_attention_fwd_func.cc

@@ -20,8 +20,6 @@
 #include "paddle/fluid/eager/api/utils/global_utils.h"
 #include "paddle/fluid/platform/profiler/event_tracing.h"
 
-#pragma GCC diagnostic ignored "-Wunused-variable"
-
 std::tuple<paddle::experimental::Tensor,
            paddle::experimental::Tensor,
            paddle::experimental::Tensor,

paddle/fluid/eager/api/manual/fluid_manual/forwards/fused_feedforward_fwd_func.cc

@@ -19,8 +19,6 @@
 #include "paddle/fluid/eager/api/utils/global_utils.h"
 #include "paddle/fluid/platform/profiler/event_tracing.h"
 
-#pragma GCC diagnostic ignored "-Wunused-variable"
-
 std::tuple<paddle::experimental::Tensor,
            paddle::experimental::Tensor,
            paddle::experimental::Tensor,

paddle/fluid/eager/api/manual/fluid_manual/forwards/fused_gate_attention_fwd_func.cc

@@ -19,8 +19,6 @@
 #include "paddle/fluid/eager/api/utils/global_utils.h"
 #include "paddle/fluid/platform/profiler/event_tracing.h"
 
-#pragma GCC diagnostic ignored "-Wunused-variable"
-
 std::tuple<paddle::experimental::Tensor,
            paddle::experimental::Tensor,
            paddle::experimental::Tensor,

paddle/fluid/eager/api/manual/fluid_manual/forwards/fused_gemm_epilogue_fwd_func.cc

@@ -20,8 +20,6 @@
 #include "paddle/fluid/eager/api/utils/global_utils.h"
 #include "paddle/fluid/platform/profiler/event_tracing.h"
 
-#pragma GCC diagnostic ignored "-Wunused-variable"
-
 paddle::experimental::Tensor fused_gemm_epilogue_dygraph_function(
     const paddle::experimental::Tensor& X,
     const paddle::experimental::Tensor& Y,

paddle/fluid/eager/auto_code_generator/eager_generator.cc

@@ -3028,8 +3028,8 @@ static void GenerateForwardDygraphFile(const std::string& forward_cc_path,
       "#include \"paddle/fluid/eager/api/utils/global_utils.h\"\n"
       "#include \"paddle/fluid/eager/amp_utils.h\"\n"
       "#include \"paddle/fluid/eager/amp_auto_cast.h\"\n"
-      "#include \"paddle/fluid/platform/profiler/event_tracing.h\"\n"
-      "#pragma GCC diagnostic ignored \"-Wunused-variable\"\n\n";
+      "#include \"paddle/fluid/platform/profiler/event_tracing.h\"\n\n";
+
   std::string forward_cc_include_str =
       paddle::string::Sprintf(FORWARD_INCLUDE_TEMPLATE);
   std::ofstream forward_cc_stream(forward_cc_path, std::ios::out);

paddle/fluid/operators/dlnne/CMakeLists.txt

 # compile flags
-set(DLNNE_FLAGS -Wno-error=non-virtual-dtor -Wno-error=unused-variable
-                -Wno-error=attributes ${fsanitize})
+set(DLNNE_FLAGS -Wno-error=non-virtual-dtor -Wno-error=attributes ${fsanitize})
 foreach(flag ${DLNNE_FLAGS})
   safe_set_cflag(CMAKE_C_FLAGS ${flag})
   safe_set_cxxflag(CMAKE_CXX_FLAGS ${flag})

paddle/fluid/pybind/CMakeLists.txt

@@ -203,7 +203,7 @@ endif()
 
 if(WITH_PSLIB)
   set(DISTRIBUTE_COMPILE_FLAGS
-      "-Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=unused-variable -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=type-limits -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
+      "-Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=type-limits -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
   )
   if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 7.0)
     set(DISTRIBUTE_COMPILE_FLAGS "${DISTRIBUTE_COMPILE_FLAGS} -faligned-new")
@@ -214,11 +214,11 @@ endif()
 if(WITH_PSCORE)
   if(WITH_ARM_BRPC)
     set(DISTRIBUTE_COMPILE_FLAGS
-        "-faligned-new -Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=unused-variable -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
+        "-faligned-new -Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
     )
   else()
     set(DISTRIBUTE_COMPILE_FLAGS
-        "-Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=unused-variable -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
+        "-Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
     )
     if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 7.0)
       set(DISTRIBUTE_COMPILE_FLAGS "${DISTRIBUTE_COMPILE_FLAGS} -faligned-new")
@@ -234,11 +234,11 @@ endif()
 if(WITH_RPC)
   if(WITH_ARM_BRPC)
     set(DISTRIBUTE_COMPILE_FLAGS
-        "-faligned-new -Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=unused-variable -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
+        "-faligned-new -Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
     )
   else()
     set(DISTRIBUTE_COMPILE_FLAGS
-        "-Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=unused-variable -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
+        "-Wno-non-virtual-dtor -Wno-error=non-virtual-dtor -Wno-error=delete-non-virtual-dtor -Wno-error=return-type -Wno-error=unused-but-set-variable -Wno-error=unknown-pragmas -Wno-error=parentheses -Wno-error=unused-result"
     )
     if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 7.0)
       set(DISTRIBUTE_COMPILE_FLAGS "${DISTRIBUTE_COMPILE_FLAGS} -faligned-new")