gdatetime: Ignore %E modifier on 64-bit big-endian for the moment
This doesn't appear to work reliably on s390x and ppc64, returning
the results that were expected without %E
or intermittently crashing.
It seems that on little-endian 64-bit, the intptr_t
returned by the
undocumented _NL_TIME_ERA_NUM_ENTRIES
correctly has the number of entries
in its low-order half (at the time of writing, 0x0000'0000'0000'000b
for
Japan), but on big-endian 64-bit, it has the number of entries in its
high-order half instead (for example 0x0000'000b'xxxx'xxxx
for Japan),
with the low-order half being all-zero or possibly uninitialized.
Making this reliable will require some sort of defined API from glibc.
Helps: #3225 (closed)
Bug-Debian: https://bugs.debian.org/1060735
Closes #3225 (closed)
Edited by Philip Withnall