C++ ignoring warnings in a block with macro - c++

Question

I am using gcc 6.2 and want to ignore warnings in a macro. My idea was to do as in the following demo code.
typedef char aligned_char __attribute__((__aligned__));
// disable warning using #pragma at the beginning of the macro
// and enable it back at the end
#define DISABLE_WARNING() \
_Pragma ("GCC diagnostic push") \
_Pragma ("GCC diagnostic ignored \"-Wignored-attributes\"")
#define ENABLE_WARNING() \
_Pragma ("GCC diagnostic pop") \
#define MACRO() \
DISABLE_WARNING() \
A<aligned_char> a; \ << This will cause warning
a.print(); \
ENABLE_WARNING()
template <typename T>
class A {
public:
void print () {}
};
int main ()
{
MACRO()
}
So when the macro expands we have the pragma to ignore the warning also. But seems like I am missing something here. Could someone please explain why it doesnt work.
If I use -save-temps option, then I see the warning is ignored and the pragmas are proper
g++ -save-temps -Wall tmp.cpp
But if I compile without -save-temps
g++ -Wall tmp.cpp
I see the warning is not ignored.
tmp.cpp:14:19: warning: ignoring attributes on template argument ‘aligned_char {aka char}’ [-Wignored-attributes]
A<aligned_char> a; \
^
tmp.cpp:26:5: note: in expansion of macro ‘MACRO’
MACRO()
^~~~~