Am 14. November 2024 um 13:31 schrieb "Bruno Haible": > No, this is not needed. In a testdir of the modules fseeko, ftello, fsync, > on mingw: > - we have REPLACE_FSEEKO=1, hence fseeko.c gets compiled, and it uses > the mingw fseeko function, > - the two new unit tests pass. > - Apparently the mingw fseeko already supports the 64-bit argument fine.
"fseeko" has the following prototype in mingw-w64: https://sourceforge.net/p/mingw-w64/code/HEAD/tree/trunk/mingw-w64-crt/stdio/fseeko32.c int fseeko(FILE* stream, _off_t offset, int whence) The offset is of type "_off_t". That type is defined like this in mingw-w64: https://sourceforge.net/p/mingw-w64/code/HEAD/tree/trunk/mingw-w64-headers/crt/_mingw_off_t.h typedef long _off_t; "long" is a 32-bit integer on Windows. So, the "fseeko" function from mingw-w64 shouldn't work for large files. If the unit test passes with it, it might be passing erroneously. Does that make sense? Markus
