--- /dev/null
+# FP_HTML_COMMENT(VARIABLE, PREFIX)
+# ---------------------------------
+AC_DEFUN([FP_HTML_COMMENT],
+[AS_IF([$1],
+ [$2HTMLStart=""; $2HTMLEnd=""],
+ [$2HTMLStart="<!--"; $2HTMLEnd="-->"])[]dnl
+AC_SUBST([$2HTMLStart])[]dnl
+AC_SUBST([$2HTMLEnd])[]dnl
+])# FP_HTML_COMMENT