Standard pragmas
A standard pragma is a pragma preprocessor directive
for which the C Standard defines the syntax and semantics and for
which no macro replacement is performed. A standard pragma must be
one of the following:
>>-#pragma--STDC--+-FP_CONTRACT------+--+-ON------+--new-line-->< +-FENV_ACCESS------+ +-OFF-----+ '-CX_LIMITED_RANGE-' '-DEFAULT-'
These pragmas are recognized and ignored.