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6.62.14 Push/Pop Macro Pragmas

For compatibility with Microsoft Windows compilers, GCC supports ‘#pragma push_macro("macro_name")’ and ‘#pragma pop_macro("macro_name")’.

-#pragma push_macro("macro_name") -
-

This pragma saves the value of the macro named as macro_name to the top of the stack for this macro.

-#pragma pop_macro("macro_name") -

This pragma sets the value of the macro named as macro_name to the value on top of the stack for this macro. If the stack for macro_name is empty, the value of the macro remains unchanged.

For example: 

#define X  1
-#pragma push_macro("X")
-#undef X
-#define X -1
-#pragma pop_macro("X")
-int x [X];
-

In this example, the definition of X as 1 is saved by #pragma -push_macro and restored by #pragma pop_macro.

-

- © Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
- https://gcc.gnu.org/onlinedocs/gcc-13.1.0/gcc/Push_002fPop-Macro-Pragmas.html -

-
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