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55de3fdd0e
Until Cygwin 3.3.6, we define __LARGE64_FILES unconditionally, so we
were using the type __sFILE64 even for 64 bit. That was lazy and wrong.
so commit 2902b3a09e0a ("Cygwin: drop requirement to build newlib's
stdio64") tried to fix that.
Unfortunately this patch forgot to take the exposure of the typename
__sFILE64 in userspace into account. This leads to trouble in C++ due
to name mangling.
Commit 0f376ae22036 tried to fix this by just renaming __sFILE to
__sFILE64 by using a macro. While __sFILE and __sFILE64 are the same
size, they are not exactly congruent.
To avoid backward compatibility problems, make sure to define FILE
as the real __sFILE64, and make sure that __sFILE is not defined at
all on Cygwin.
Fixes: 0f376ae22036 ("Cygwin: rename __sFILE to __sFILE64 for backward
compatibility")
Fixes: 2902b3a09e0a ("Cygwin: drop requirement to build newlib's stdio64")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>