#5 Error during compilation

[khvalera]

When compiling see the following:
checking for correct ltmain.sh version... grep: character class syntax is [[:space:]], not [:space:]
no

*** Gentoo sanity check failed! ***
*** libtool.m4 and ltmain.sh have a version mismatch! ***
*** (libtool.m4 = 1.5.18, ltmain.sh = ) ***

Please run:

libtoolize --copy --force

if appropriate, please contact the maintainer of this
package (or your distribution) for help.