configure: Fix check_exec_crash for ICL support
Change the check_exec_crash test to use a function pointer instead of simply calling the function. The EBP availability test will crash when compiled with ICL likely due to compiler optimization shenanigans. Originally the check_exec_crash code was moved out of main to fix a problem with gcc's treatment of non-leaf main on x86_32. Libav already moved the code out of main but the addition of the function pointer will prevent any inlining which fixes the remaining problem. A function pointer is used since it is compiler agnostic (as opposed to say __attribute__ ((noinline)) which would only work with gcc compatible compilers). Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
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configure
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3
configure
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@ -911,6 +911,7 @@ static void sighandler(int sig){
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int foo(void){
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$code
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}
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int (*func_ptr)(void) = foo;
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int main(void){
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signal(SIGILL, sighandler);
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signal(SIGFPE, sighandler);
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@ -918,7 +919,7 @@ int main(void){
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#ifdef SIGBUS
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signal(SIGBUS, sighandler);
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#endif
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foo();
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return func_ptr();
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}
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EOF
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}
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