solved in part. to install jre just have to check the readme file on /usr/ports/opt/jre/ and it is done. no problem to install it.
concerning the libreoffice I have checekd the pkgfile and  concluded that all the dependencies have been fulfilled. Still cannot install

2015-05-24 15:46 GMT-03:00 Cezar Rangel <cezar.rangel@gmail.com>:
Hi Guys I have reinstalled Crux-3.1 and now I am running kernel-4.0.3 almost smoothly
when I try to install libreoffice and jre there is an error (pastebin below) and the installation fails. Tks. best regards

http://pastebin.com/Q3jpZKNb



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       Cezar Rangel
cezar.rangel@gmail.com