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869cfe9fed
We have s_fabs.c, but fabs(3) is already provided by libc due to
historical reasons, so it is not compiled into libm. When the linker
does not use --undefined-version, this leads to a complaint about the
symbol being nonexistent, so remove it from Symbol.map.
While here, adjust the comment about some functions being supplied by
libc: while it is true that all these are indeed in libc, libm still
includes its own versions of frexp(3), isnan(3), isnanf(3), and
isnanl(3).
Reported by: Steve Kargl <sgk@troutmask.apl.washington.edu>
MFC after: 3 days
(cherry picked from commit
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| aarch64 | ||
| amd64 | ||
| arm | ||
| bsdsrc | ||
| i387 | ||
| ld80 | ||
| ld128 | ||
| man | ||
| mips | ||
| powerpc | ||
| riscv | ||
| src | ||
| tests | ||
| x86 | ||
| Makefile | ||
| Makefile.depend | ||
| Symbol.map | ||