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More stable workaround for MinGW fseek() workaround #1759

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Merged
derselbst merged 4 commits into from
Feb 21, 2026
+3 −3
Merged

More stable workaround for MinGW fseek() workaround #1759

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86aa88a
Test if ftell issue for mingw x64
derselbst Feb 17, 2026
7183b8d
Revert "Test if ftell issue for mingw x64"
derselbst Feb 17, 2026
6710d00
More stable workaround for MinGW _ftelli64() issue
derselbst Feb 17, 2026
40f45df
review findings
derselbst Feb 17, 2026
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6 changes: 3 additions & 3 deletions src/utils/fluid_sys.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1668,12 +1668,12 @@ int fluid_file_read(void *buf, fluid_long_long_t count, FILE *fd)

int fluid_file_seek(FILE *fd, fluid_long_long_t ofs, int whence)
{
#if (defined(__MINGW32__) || defined(__MINGW64__)) && defined(__GNUC__) && (__GNUC__ < 15)
// Some older versions of MinGW report incorrect values for _ftelli64(). This is problematic,
#if defined(__MINGW32__) && defined(__i386__)
// Some older versions of MinGW i686 report incorrect values for _ftelli64(). This is problematic,
// because _fseeki64() below would use these incorrect values when seeking with SEEK_CUR,
// resulting in incorrect file positions. So we need to work around this by doing the SEEK_CUR
// calculation ourselves.
// See https://sourceforge.net/p/mingw-w64/bugs/4897/ for more details.
// See https://sourceforge.net/p/mingw-w64/bugs/864/ for more details.
if(whence == SEEK_CUR)
{
whence = SEEK_SET;
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