Build: fix 775 configure should detect doc reqs.

It's a trivial patch, but I feel a bit sheepish proposing any
changes to the build system after making such a big deal about a
"build system freeze" back in June and July.  :|

diff --git a/configure.in b/configure.in
index f41aef700ad338f4068b13f9d6850d506f7bafaf..de37814012d5ff287628a84722890d41a045d881 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -188,6 +188,12 @@ STEPMAKE_PROGS(MAKEINFO, makeinfo, REQUIRED, 4.11)
 STEPMAKE_PROGS(TEXI2HTML, texi2html, OPTIONAL, 1.82)
 STEPMAKE_PROGS(DBLATEX, dblatex, OPTIONAL)
 STEPMAKE_PROGS(PDFLATEX, pdflatex, OPTIONAL)
+STEPMAKE_PROGS(NETPBM, pngtopnm, OPTIONAL)
+STEPMAKE_PROGS(IMAGEMAGICK, convert, OPTIONAL)
+# this name avoids a conflict with ZIP in stepmake/aclocal.m4
+STEPMAKE_PROGS(ZIPDOC, zip, OPTIONAL)
+STEPMAKE_PROGS(RSYNC, rsync, OPTIONAL)
+
 
 AC_DEFINE_UNQUOTED(FLOWER_VERSION, "${FULL_FLOWER_VERSION}")