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Leveraging objdump extensions for better autoconf cross-compilation support?

Philip Prindeville philipp_subx@redfish-solutions.com
Mon Oct 16 22:53:00 GMT 2017 
> On Oct 16, 2017, at 1:36 AM, Andreas Schwab <schwab@suse.de> wrote:
> 
> On Okt 15 2017, Philip Prindeville <philipp_subx@redfish-solutions.com> wrote:
> 
>> You’d have things like:
>> 
>> #include <stdio.h>
>> 
>> int main(int argc, char *argv[])
>> {
>>    printf(“sizeof long=%u\n”, sizeof(long));
>>    exit(0);
>> }
>> 
>> or whatever being compiled and run.
>> 
>> What if you could get by with:
>> 
>> const unsigned size_long = sizeof(long);
> 
> autoconf already has a standard macro for these kind of tests,
> AC_CHECK_SIZEOF, which is cross-friendly.
> 
> Andreas.
> 


Well, it would still be useful for other things, like (as I mentioned) detecting the format that floating point numbers are stored natively.

-Philip
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