fun fact about ICU +universal
fw at fwright.net
Mon Feb 15 02:11:18 UTC 2021
On Sun, 14 Feb 2021, Ken Cunningham wrote:
> The i386/x86_64 universal build looks fine too, so far, with all the
> muniveral stuff out.
> Now -- have to see why it was ever put in there in the first place, I guess.
One of the typical sources of trouble with "natural universal" builds is
architecture-dependent configure checks, whose results are inherently
forced to be single-valued across architectures. Since arm64 and x86_64
have both the same bitness and the same endianness, it might be a
non-issue for that combination in many cases, even while being technically
incorrect. If i386/x86_64 also works, that suggests that bitness isn't an
issue, but endianness would be if ppc were included. Alignment is another
potential issue, but less likely to be in these cases.
Though another problem with this sort of issue is that merely building
successfully doesn't verify that the code actually works correctly.
Remember Apple was shipping Intel Macs to end users before they'd fixed
all the endian bugs.
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