Building with clang and -flto on macOS currently fails with errors
similar to [1]. This is because the --export-dynamic flag is called
-export_dynamic [2] instead and we have not been passing this variant to
the linker, so far.
Attached patch fixes that for configure/make.
CC: Tom, who hit the same in [3] and Andres who last touched
--export-dynamic in 9db49fc5bfdc0126be03f4b8986013e59d93b91d.
Will also create an issue upstream for meson, because the logic is
built-in there.
Would be great if this could be back-patched, since this is the same in
all live versions.
Best,
Wolfgang
[1]: https://postgr.es/m/1581936537572-0.post%40n3.nabble.com
[2]:
https://opensource.apple.com/source/ld64/ld64-609/doc/man/man1/ld.1.auto.html
(grep for export_dynamic)
[3]: https://postgr.es/m/21800.1499270547%40sss.pgh.pa.us
