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Is it possible to write C code so that when it is compiled with

gcc -o foo foo.c

it in fact compiles foo.c with -O2?

I am using gcc 4.4.6.

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  • 1
    Are you doing the optimization lab from Bryant and O'Hallaron CS:APP? Commented Nov 26, 2013 at 18:43
  • 3
    alias gcc='gcc -O2' Commented Nov 26, 2013 at 18:43
  • @MarcB I need it in the C source itself. Commented Nov 26, 2013 at 18:44
  • @ScottyBauer I am setting work and want to know if they can trick me easily! Commented Nov 26, 2013 at 18:44
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    wrt "I need it in the C source": you can rebuild gcc to change this behavior. Beware, consumers of @marshall's new compiler! Commented Nov 26, 2013 at 18:49

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recent gcc knows a #pragma GCC optimize pragma (http://gcc.gnu.org/onlinedocs/gcc/Function-Specific-Option-Pragmas.html)

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