'AC_CHECK_LIB(asan, _init) succeeds for some reason

I am trying to figure out how AC_CHECK_LIB([asan], [_init], ,[...]) succeeds despite the source for asan not having a symbol called _init.

I verified the symbols by using nm -D /path/to/libasan. There is only one matching symbol called __asan_init.

Shouldn't autoconf fail with error saying it is unable to locate symbol init in the said library?

Regards

c++clinuxautoconf


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