AC_CHECK_LIB() was running gcc -Llib -lm -lutils conftest.c which on
platforms that do as needed operations by default will result in
underlinking. Instead AC_CHECK_LIB() suggests supplying the extra
libraries necessary in a 5th argument.
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>