I once had a similar problem with emerging esound on a workstation.
emerge -1 sgml-common && emerge -1 openjade did the trick

Robert Welz schrieb:
> I emerged -e system on hardened gentoo-2.6.20-hardened-r6
> and got this.
>
> Some Ideas, someone?
>
> emerge net-misc/iputils fails noisily with
>
> jade:/usr/share/sgml/docbook/dsssl-stylesheets-1.79/html/../common/../common/dbl1sr.dsl:2:66:W:
> cannot generate system identifier for public text "ISO
> 8879:1986//ENTITIES Added Latin 2//EN"
> jade:/usr/share/sgml/docbook/dsssl-stylesheets-1.79/html/../common/../common/dbl1sr.dsl:3:5:E:
> reference to entity "lat2" for which no system identifier could be
> generated
> jade:/usr/share/sgml/docbook/dsssl-stylesheets-1.79/html/../common/../common/dbl1sr.dsl:2:0:
> entity was defined here
> make[1]: *** [arping.html] Error 8
> make[1]: Leaving directory
> `/var/tmp/portage/net-misc/iputils-20060512/work/iputils-s20060512/doc'
> make: *** [html] Error 2
>
> !!! ERROR: net-misc/iputils-20060512 failed.
> Call stack:
>   ebuild.sh, line 1638:   Called dyn_compile
>   ebuild.sh, line 985:   Called qa_call 'src_compile'
>   ebuild.sh, line 44:   Called src_compile
>   iputils-20060512.ebuild, line 51:   Called die
>
> !!! (no error message)
> !!! If you need support, post the topmost build error, and the call
> stack if relevant.
> !!! A complete build log is located at
> '/var/log/elog/net-misc:iputils-20060512:20070913-154138.log'.
>
>
>
> and emerge sys-apps/man fails sometimes, I could not reproduce it now.
>
> emerge app-text/docbook-sgml-utils failed, too:
>
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:112:18:E:
> "X016F" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:113:18:E:
> "X016E" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:114:19:E:
> "X0169" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:115:19:E:
> "X0168" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:116:18:E:
> "X0175" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:117:18:E:
> "X0174" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:118:18:E:
> "X0177" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:119:18:E:
> "X0176" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:120:17:E:
> "X0178" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:121:19:E:
> "X017A" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:122:19:E:
> "X0179" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:123:19:E:
> "X017E" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:124:19:E:
> "X017D" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:125:17:E:
> "X017C" is not a function name
> jade:/usr/share/sgml/docbook/xml-dtd-4.1.2/ent/iso-lat2.ent:126:17:E:
> "X017B" is not a function name
> make[2]: *** [backend-spec.html] Error 1
> make[2]: *** [docbook2man.html] Error 1
> make[2]: Leaving directory
> `/var/tmp/portage/app-text/docbook-sgml-utils-0.6.14/work/docbook-utils-0.6.14/doc/HTML'
>
> make[1]: *** [all-recursive] Error 1
> make[1]: Leaving directory
> `/var/tmp/portage/app-text/docbook-sgml-utils-0.6.14/work/docbook-utils-0.6.14/doc'
>
> make: *** [all-recursive] Error 1
>
> !!! ERROR: app-text/docbook-sgml-utils-0.6.14 failed.
> Call stack:
>   ebuild.sh, line 1638:   Called dyn_compile
>   ebuild.sh, line 985:   Called qa_call 'src_compile'
>   ebuild.sh, line 44:   Called src_compile
>   ebuild.sh, line 657:   Called die
>
> !!! emake failed
> !!! If you need support, post the topmost build error, and the call
> stack if relevant.
> !!! A complete build log is located at
> '/var/log/elog/app-text:docbook-sgml-utils-0.6.14:20070913-154405.log'.
>
>
>
>