Check attached build log.
Created attachment 175870 [details]
The same error for me on ~amd64.
Created attachment 179144 [details, diff]
patch for gcc 4.3
Created attachment 179146 [details]
updated ebuild to include gcc 4.3 patch
+ 16 Feb 2009; Peter Alfredsen <email@example.com>
+ +files/vbs-1.4.0-gcc-4.3.patch, vbs-1.4.0.ebuild:
+ Add gcc-4.3 patch per bug 251627. Thanks to Gene Seto
+ <firstname.lastname@example.org> for the patch.