[Octave-bug-tracker] [bug #57644] fseek fread fail for files >4GB 5.1.0 on Windows10 64-bit x64 proc

[John Donoghue]

Follow-up Comment #19, bug #57644 (project octave):

This patch appears to work:


--- a/libgnu/lseek.c    2019-12-09 08:37:43.205846694 -0500
+++ a/libgnu/lseek.c    2020-01-22 13:42:47.180859301 -0500
@@ -63,7 +63,7 @@
       return -1;
     }
 #endif
-#if _GL_WINDOWS_64_BIT_OFF_T
+#if defined _GL_WINDOWS_64_BIT_OFF_T || defined __MINGW64__
   return _lseeki64 (fd, offset, whence);
 #else
   return lseek (fd, offset, whence);



I think the issue really is that gnulib detects that mingw64 natively supports
largefile support - which looks like it means it then doesn't set
_GL_WINDOWS_64_BIT_OFF_T anywhere.

the fseeko in gnulib is the same - using _GL_WINDOWS_64_BIT_OFF_T to determine
wther is should call skeeo. skeeko64 or _fseeki64



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