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Re: dlopen fails from static binary

> errno is for syscalls.
errno is standard C, there are non-syscall library functions that do,
and are required to, set errno, for example strtol(3) and friends.

$ grep -rlFw errno /usr/share/man/man3 | wc -l

(Yes, some/most may set errno due to system calls failing, but
certainly not all of them)

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