I need to generate a PDF-file from subdocuments. I have this Makefile: whole.pdf: 1.pdf 2.pdf 3.pdf 4.pdf 5.pdf 6.pdf 7.pdf 8.pdf 9.pdf gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=$@ -dBATCH $^
The problem is that a subdocument may begin on the backside of the last page of the previous subdocument. This is bad if the printed document should be divided into subdocuments. Therefore I need to make sure that every subdocument begins on a new paper. A way to do this would be to insert an empty 1-page document (empty.pdf) after each document that has an odd number of pages: whole.pdf: 1.pdf 2.pdf 3.pdf empty.pdf 4.pdf 5.pdf 6.pdf 7.pdf empty.pdf 8.pdf empty.pdf 9.pdf gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=$@ -dBATCH $^ That is certainly not the right way to do it. It will fail if I change any subdocument so that its page count modulo 2 is changed. By using pdfinfo (in the poppler package) I can find out whether a particular PDF-file has an odd number of pages: echo $(pdfinfo file.pdf|egrep "^Pages: *[[:digit:]]+$"|sed "s...@^pages: *\([[:digit:]]\+\)\...@\1@")%2|bc But which is the right way to build that into the Makefile? _______________________________________________ Help-make mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-make
