Attached is a patch that uses autoconf to determine whether there
is a working 64-bit-int type available. In playing around with it on my machine, I found that gcc provides perfectly fine support for "long long" arithmetic ... but sprintf() and sscanf(), which are system-supplied, don't work :-(. So the autoconf test program does a cursory test on them too. If we find that a lot of systems are like this, it might be worth the trouble to implement binary<->ASCII conversion of int64 ourselves rather than relying on sprintf/sscanf to handle the data type. regards, tom lane
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