[Bug c/31236] incorrect output on external symbol address cast as integer used in conditional statement

[sh-list at ssc-studios dot com]

------- Comment #4 from sh-list at ssc-studios dot com  2007-03-17 17:31 -------
so in other words you're saying the solution to this is 
"if you want it to work with GCC, make your code non-portable"

afaik "__attribute__ (( weak ))" is not part of the standard, its not a
portable solution.

the fact that
        #define SOMEVALUE ((int)&SomeLinkerScriptDefinedSymbol)
        int i = SOMEVALUE; 
        if(i == 0){
and
        if(SOMEVALUE == 0){

give a different result makes gcc act inconsistently on code that should be
equivalent.

what are the real-life speed and size gains of this optimization?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31236