On Thursday, 27 January 2022 at 21:50:12 UTC, kinke wrote:
An example:
[...]
Now if the calls are inlined, the behavior might not be
consistent anymore. So separate compilations with different
compiler flags can cause observable differences.
Thanks! This was very informative. Though I'm not convinced that
having a single (but randomly chosen) function used across the
whole program is much better than a random mix of multiple
versions. Especially if (unlike your example) this function
doesn't identify itself in a user visible way. Both cases are
bad, one is just much worse than the other.
Internet seems to disagree about what happens when multiple weak
symbols are encountered and various interpretations can be found:
"Given multiple weak symbols, choose any of the weak symbols",
"if there exists several weak symbols, GCC will choose one that
have the largest size (memory occupation)", etc. And I'm not
inclined to happily rely on either of these opinions.
