[Octave-bug-tracker] [bug #55916] pdfTeX warnings in build: found PDF version <1.7>, but at most version <1.5> allowed

[Andrew Janke]

Follow-up Comment #4, bug #55916 (project octave):

> This is odd. It seems like there is a possible mismatch between the TexInfo
tools on your computer and the PDF files generated by gl2ps and ghostscript. 

I've got recent TeXLive (MacTeX 2018), Texinfo (6.6), and Ghostscript (9.23)
installed on my machine. I think those are the most recent versions of each.

But that Ghostscript-generated PDF file is indeed PDF 1.5 for me, unlike your
1.7 version.


[~/local/repos/octave-BUILD/build/doc/interpreter]
$ pdfinfo splinefit6.pdf 
Producer:       GPL Ghostscript 9.23
CreationDate:   Thu Mar 14 14:46:14 2019 EDT
ModDate:        Thu Mar 14 14:46:14 2019 EDT
Tagged:         no
UserProperties: no
Suspects:       no
Form:           none
JavaScript:     no
Pages:          1
Encrypted:      no
Page size:      360 x 252 pts
Page rot:       0
File size:      2843 bytes
Optimized:      no
PDF version:    1.5
[~/local/repos/octave-BUILD/build/doc/interpreter]
$ texi2pdf --version    
texi2pdf (GNU Texinfo 6.6)

Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
[~/local/repos/octave-BUILD/build/doc/interpreter]
$ which texi2pdf   
/usr/local/opt/texinfo/bin/texi2pdf
[~/local/repos/octave-BUILD/build/doc/interpreter]
$ pdfetex --version     
pdfTeX 3.14159265-2.6-1.40.19 (TeX Live 2018)
kpathsea version 6.3.0
Copyright 2018 Han The Thanh (pdfTeX) et al.
There is NO warranty.  Redistribution of this software is
covered by the terms of both the pdfTeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the pdfTeX source.
Primary author of pdfTeX: Han The Thanh (pdfTeX) et al.
Compiled with libpng 1.6.34; using libpng 1.6.34
Compiled with zlib 1.2.11; using zlib 1.2.11
Compiled with xpdf version 4.00
[~/local/repos/octave-BUILD/build/doc/interpreter]
$ which pdfetex    
/Library/TeX/texbin/pdfetex
[~/local/repos/octave-BUILD/build/doc/interpreter]
$ gs --version
9.23


The Mac situation is a little weird: macOS ships with an ancient (4.8) version
of Texinfo. So I have an additional Homebrewed installation of the new 6.6
Texinfo in /usr/local/opt. I have my $PATH set up to pull in the new Texinfo
(confirmed by `which` in output above). I wonder if maybe some tool here is
ignoring the path and calling /usr/bin/texi* tools directly?

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