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|Home > Compiler Coding Practices > _Pragma preprocessing operator in C99|
C90 does not permit a
#pragma directive to be produced as the result of a macro expansion. However, the C99
_Pragma operator enables you to embed a preprocessor macro in a pragma directive.
_Pragma is permitted in C90 if
--strict is not
# define RWDATA(X) PRAGMA(arm section rwdata=#X) # define PRAGMA(X) _Pragma(#X) RWDATA(foo) // same as #pragma arm section rwdata="foo" int y = 1; // y is placed in section "foo"