Removing last remnants of pragma block at the top of pybind11.h, defa…

…ulting CUDA, GCC7, GCC8 to PYBIND11_NOINLINE_DISABLED, with the option to define PYBIND11_NOINLINE_FORCED.

include/pybind11/detail/common.h

@@ -99,6 +99,14 @@
 #  endif
 #endif
 
+// For CUDA, GCC7, GCC8:
+// PYBIND11_NOINLINE_FORCED is incompatible with `-Wattributes -Werror`.
+// When defining PYBIND11_NOINLINE_FORCED, it is best to also use `-Wno-attributes`.
+#if !defined(PYBIND11_NOINLINE_FORCED) && \
+    (defined(__CUDACC__) || (defined(__GNUC__) && (__GNUC__ == 7 || __GNUC__ == 8)))
+#  define PYBIND11_NOINLINE_DISABLED
+#endif
+
 // The PYBIND11_NOINLINE macro is for function DEFINITIONS.
 // In contrast, FORWARD DECLARATIONS should never use this macro:
 // https://stackoverflow.com/questions/9317473/forward-declaration-of-inline-functions

include/pybind11/pybind11.h

@@ -10,11 +10,6 @@
 
 #pragma once
 
-#if defined(__CUDACC__) || (defined(__GNUC__) && (__GNUC__ == 7 || __GNUC__ == 8))
-#  pragma GCC diagnostic push
-#  pragma GCC diagnostic ignored "-Wattributes"
-#endif
-
 #include "attr.h"
 #include "gil.h"
 #include "options.h"
@@ -2383,7 +2378,3 @@ PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
 #if defined(__GNUC__) && __GNUC__ == 7
 #    pragma GCC diagnostic pop // -Wnoexcept-type
 #endif
-
-#if defined(__CUDACC__) || (defined(__GNUC__) && (__GNUC__ == 7 || __GNUC__ == 8))
-#  pragma GCC diagnostic pop
-#endif