How do I avoid the following errors? <------------- cd /home/evansl/prog_dev/boost-cvs/boost/libs/variant/doc/ bjam --v2 /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/tools/boostbook.jam:322: in construct warning: rulename $(base-target).depends expands to empty string /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/build/targets.jam:1025: in object(boostbook-target-class)@1.generate /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/build/targets.jam:546: in generate-really /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/build/targets.jam:519: in object(main-target)@1.generate /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/build/targets.jam:203: in object(project-target)@11.generate /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/build-system.jam:160: in load /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/kernel/modules.jam:259: in import /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/kernel/bootstrap.jam:120: in boost-build /home/evansl/prog_dev/boost-cvs/boost/boost-build.jam:12: in module scope /home/evansl/prog_dev/boost-cvs/boost/tools/build/v2/tools/boostbook.jam:326: in construct warning: rulename $(target).set-path expands to empty string
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TIA. Larry