[PATCH] Fix ilogb exception and errno (bug 6794)

[David Miller]

From: Mike Frysinger <vapier@gentoo.org>
Date: Tue, 17 Apr 2012 23:25:09 -0400

> i see a bunch of e_ilogbl.c files still in the tree.  did you miss some in 
> renaming to e_ilogbl.c ?
> 
> sysdeps/ieee754/ldbl-128/s_ilogbl.c
> sysdeps/ieee754/ldbl-64-128/s_ilogbl.c
> sysdeps/ieee754/ldbl-96/s_ilogbl.c
> sysdeps/sparc/sparc64/soft-fp/s_ilogbl.c

Indeed both sparc builds are broken, for example:

make[2]: *** No rule to make target '/home/davem/src/GIT/GLIBC/build-sparcv9-multiarch/math/e_ilogbl.o', needed by '/home/davem/src/GIT/GLIBC/build-sparcv9-multiarch/math/libm.a'.  Stop.