bibtex.fls is generated.
Makefiles variable -- TEXFILES= LATEXINTFILES= GRAPHICFILES= BIBDB=ref.bib
bibtex.d is generated by scanning bibtex.tex and bibtex.fls.
---------- bibtex_1.pdf: rebase ----------
platex -interaction=batchmode bibtex.tex
pbibtex bibtex.aux
`bibtex.bbl' -> `bibtex.bbl_prev'
platex -interaction=batchmode bibtex.tex
LaTeX Warning: There were undefined references.
platex -interaction=batchmode bibtex.tex
dvipdfmx bibtex.dvi
`bibtex.pdf' -> `bibtex_1.pdf'

patching file bibtex.tex
---------- bibtex_2.pdf: update ----------
bibtex.fls is generated.
Makefiles variable -- TEXFILES= LATEXINTFILES=bibtex.bbl GRAPHICFILES= BIBDB=ref.bib
bibtex.d is generated by scanning bibtex.tex and bibtex.fls.
platex -interaction=batchmode bibtex.tex
pbibtex bibtex.aux
`bibtex.bbl' -> `bibtex.bbl_prev'
platex -interaction=batchmode bibtex.tex
LaTeX Warning: There were undefined references.
platex -interaction=batchmode bibtex.tex
dvipdfmx bibtex.dvi
`bibtex.pdf' -> `bibtex_2.pdf'