Alan W. Irwin wrote:
On 2007-05-31 17:32+0900 Valery Pipin wrote:
BTW, I have others warnings like
Verifying ELF objects in /home/vv/tmp/plplot-buildroot
(arch=normal,fhs=normal,rpath=normal,stack=normal,textrel=relaxed,unresolved=relaxed)
verify-elf: WARNING: ./usr/lib/libcsirocsa.so.0.0.1: undefined symbol: sqrt
verify-elf: WARNING: ./usr/lib/libcsirocsa.so.0.0.1: undefined symbol: floor
verify-elf: WARNING: ./usr/lib/libcsirocsa.so.0.0.1: undefined symbol: ceil
verify-elf: WARNING: ./usr/lib/libcsirocsa.so.0.0.1: undefined symbol: hypot
Does it mean that libcsirocsa is compiled without -lm ?
Thanks for pointing out this build bug which I have just verified for myself
using 'ldd -r libcsirocsa.so'.
Now fixed in svn (revision 7698).
To answer your original question: C libraries that use the math
functions require the math library (-lm)
to be explicitly specified when linking. At least that is the
traditional way on UNIX and Linux (no idea
why this should be so, but it is).
Regards,
Arjen
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