DOCS_TARGET_REQUIRE_PROGRAM(DBLATEX, dblatex, LATEX)
DOCS_TARGET_REQUIRE_PROGRAM(PLUCKERBUILD, plucker-build, PLUCKER)
DOCS_TARGET_REQUIRE_PROGRAM(HTML2TEXT, html2text, TXT)
-DOCS_TARGET_REQUIRE_PROGRAM(PERL, perl, UNDOCUMENTED)
DOCS_TARGET_REQUIRE_PROGRAM(XMLLINT, xmllint, VALIDATE)
DOCS_TARGET_REQUIRE_PROGRAM(DB2TEXI, docbook2x-texi, TEXI)
DOCS_TARGET_REQUIRE_PROGRAM(MAKEINFO, makeinfo, TEXIINFO)
DOCS_DEFINE_TARGET(VALIDATE, ALL, [validating docbook output], [])
DOCS_DEFINE_TARGET(TEXI, ALL, [TexInfo versions], [texi])
DOCS_DEFINE_TARGET(TEXIINFO, ALL, [TexInfo Info versions], [texiinfo])
-DOCS_DEFINE_TARGET(UNDOCUMENTED, MANPAGES, [list of undocumented options], [undocumented])
DOCS_DEFINE_TARGET(TXT, HTML, [text versions], [txt])
if test x"$TARGETS" = x; then