cmake: check fseeko after detecting HAVE_FILE_OFFSET_BITS #13264
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On Android,
fseeko
is defined as is (I omitted other functions for clarity):Which means that on Android 32bits (armv7), fseeko is only available in 32bits mode, if
__USE_FILE_OFFSET64
(_FILE_OFFSET_BITS=64
) is set thenfseeko
is not available.CMake detects
fseeko
as available because_FILE_OFFSET_BITS=64
is not yet defined when it tests for this function existence, but then it defines_FILE_OFFSET_BITS=64
which makesfseeko
unavailable and fails compilation:A simple fix is to test for
fseeko
existence after testingHAVE_FILE_OFFSET_BITS
and especially aftertested here
Fix #12086 for good