eclass/latex-package.eclass: Use in_iuse and build doc conditionnally…

… if doc useflag is present; ref. bug #573530

eclass/latex-package.eclass

@@ -51,10 +51,10 @@
 # you must either grab each file individually, or find a place to mirror an
 # archive of them. (iBiblio)
 #
-# It inherits base in EAPI 5 and earlier.
+# It inherits base and eutils in EAPI 5 and earlier.
 
 case ${EAPI:-0} in
- 0|1|2|3|4|5) inherit base ;;
+ 0|1|2|3|4|5) inherit base eutils ;;
  6) ;;
  *) die "Unknown EAPI ${EAPI} for ${ECLASS}" ;;
 esac
@@ -124,11 +124,13 @@ latex-package_src_doinstall() {
  done
  ;;
  "tex" | "dtx")
- for i in `find . -maxdepth 1 -type f -name "*.${1}"`
- do
- einfo "Making documentation: $i"
- texi2dvi -q -c --language=latex $i &> /dev/null || die
- done
+ if ! in_iuse doc || use doc ; then
+ for i in `find . -maxdepth 1 -type f -name "*.${1}"`
+ do
+ einfo "Making documentation: $i"
+ texi2dvi -q -c --language=latex $i &> /dev/null || die
+ done
+ fi
  ;;
  "tfm" | "vf" | "afm")
  for i in `find . -maxdepth 1 -type f -name "*.${1}"`