GNU Autoconf, Automake and LibtoolCommonly Used configure.in macrosAC_CHECK_LIB

4.2. AC_CHECK_LIB

AC_CHECK_LIB(m, pow)

if test "x$requires_libavl" = "xyes" ; then
    AC_CHECK_LIB(avl, avl_create, [], [
        echo "Error! You need to have libavl around."
        exit -1
        ])
fi

Written by Shlomi Fish