[OE-core] Eglibc related / libm issue

[Samuel Stirtzel]

Hi,
currently building dependency depencies of Plasma Active dependency
dependencies (this sentence may contain slight ironic content).

One of the libraries wants the maths.h library libm.
Libm existent in my rootfs under /lib/libm-2.12.2.so, /lib/libm.so.6
that points to it and the other link at /usr/lib/libm.so.
But for some reason configure can't find it and quits with this error:

ac_cv_header_math_h=yes
...
configure:14858: checking for ceil, floor and round in default libs
configure:14900: checking for ceil, floor and round with -lm
configure:14943: error: Could not find ceil, floor, round in default
libs or with -lm


Anyone knows what causes this, or how it could be resolved?
-- 
Regards
Samuel