A-, QA-
Disables all predefined macros. This is a deprecated option.
alias-const, Qalias-const
Determines whether the compiler assumes a parameter of type pointer-to-const does not alias with a parameter of type pointer-to-non-const.
align
Determines whether variables and arrays are naturally aligned.
ansi
Enables language compatibility with the gcc option -ansi.
arch
Tells the compiler to generate code specialized for the processor that executes your program.
auto-ilp32, Qauto-ilp32
Instructs the compiler to analyze the program to determine if there are 64-bit pointers that can be safely shrunk into 32-bit pointers and if there are 64-bit longs (on Linux* OS) that can be safely shrunk into 32-bit longs.
auto-p32
Instructs the compiler to analyze the program to determine if there are 64-bit pointers that can be safely shrunk to 32-bit pointers.
ax, Qax
Tells the compiler to generate multiple, processor-specific auto-dispatch code paths for Intel processors if there is a performance benefit.