Fixes "implicit declaration of function" error with devtoolset-10
(gcc (GCC) 10.2.1 20210130 (Red Hat 10.2.1-11)) in centos7 Docker image
used for building an AppImage.
See also the original source code:
https://github.com/jlaurens/synctex/blob/2020/synctex_parser.c#L104
I am cross-compiling with clang for FreeBSD and the build is failing with:
error: initializing 'char *' with an expression of type 'const char [1]' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
Mark the char pointers as const to fix this build failure.
A lot of this code has been commented out for over
a decade and adds no value to the project.
It is only annoying when you look over it ;).
Same for the KNS2 support which was commented out.
Also some of the debug statements didn't even build
anymore, because the properties got removed/refactored.
find . \( -name "*.cpp" -or -name "*.h" -or -name "*.c" -or -name "*.cc" \) -exec clang-format -i {} \;
If you reached this file doing a git blame, please see README.clang-format (added 2 commits in the future of this one)
bd20e48c3c updated Okular's copy of the synctex code to 1.19.
Unfortunately since this version the upstream code logs errors like
`"! SyncTeX Error : Ignored record...` when accessing selected synctex
files created with older versions of synctex.
The upstream `_synctex_log` contains `va_list arg` as a parameter, but
fails to initialize and tear down this properly via `va_start` and
`va_end`. In general this seems to work for the single argument case.
However, once we apply our hardening patch to get rid of the
`gnu_printf format attribute` warning and thus introduce a variadic
argument, things go wrong.
To fix this, we add the missing code. The remaining changes are just
refreshing the patches.
BUG: 383915
Test Plan:
Opening `empty.pdf` with `empty.synctex.gz` from
https://bugs.kde.org/attachment.cgi?id=109116 located
in the same folder does not lead to Okular segfaulting anymore.
Summary:
This should prevent crashes when reloading some synctex-enabled pdf
files created with newer versions of TeXLive. We also gain bugfixes,
features and improved accuracy from the last 6 years of synctex
development.
Procedure followed:
- svn co svn://tug.org/texlive/trunk/Build/source/texk/web2c/synctexdir
- Check out revision 45150
- Update files present in core/synctex/*
- Adapt Okular code to changes
- Review and drop or update/apply old patches using quilt
- Create missing patches for local synctex changes
- New patch: Omit warning message when opening non-synctex pdf
- Two new patches to fix more compiler warnings
- New patch: Plug multiple leaks and prevent a segfault
TODO for later:
- Move sync file detection code to Okular to never call into synctex C code for non-synctex files
- Evaluate feasibility of upstreaming all patches for TeXLive 2018 and using synctex as a library
BUG: 383915
FIXED-IN: 17.12.0
Test Plan:
- No crash in synctex on reloading empty.pdf from bugreport anymore.
- Shift-clicking on a word in a simple pdf opens Kate with the corresponding tex line.
- Forward and backward search in Kile seems to work.
- Works with synctex files from both TeXLive 2015 and 2017.
- PartTest::testForwardPDF still passes.
- No additional memory leaks in autotests and with basic synctex and non-synctex usage of Okular.
Reviewers: #okular, sander, #kile, aacid
Reviewed By: #okular, aacid
Subscribers: mludwig, aacid
Tags: #okular
Differential Revision: https://phabricator.kde.org/D7594
This way dvi and any other potential user gets it for free
The diff is huge, but the synctex files are just moves.
And the code in core/ is also mostly just a move from the generator_pdf.cpp code
Acked by Luigi
REVIEW: 120311
