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Update to 2.49.2. From the changelog:
## [2.49.2] – 2021-10-16 ### Changed - Lefty is disabled by default in the Autotools build system. To re-enable it, pass `--enable-lefty` to `./configure`. In a future release, Lefty will be removed. - remove PHP5 support in SWIG bindings ### Fixed - Msys experimental packages are included in release artifacts #2130 - CMake build system incorrectly aliases gv2gml to gml2gv #2131 - Gv2gml Doesn't escape quotes in attributes #1276 - GVPR incorrectly understands color schemes #1956 ## [2.49.1] – 2021-09-22 ### Changed - the CMake build system installs gzipped man pages if `gzip` is available #1883 - CMake projects using Graphviz as a subproject (`add_subdirectory`) can now link against and use `gvc`. ### Fixed - various problems in the generation of Javascript bindings - 2.48.0: test suite is failing #2112 - Ensure correct file-level dependency for generated file in cmake generated projects #2119 - compile failures with a C++20-compatible toolchain #2122 - compile errors on macOS when using Bison 3.8 #2127 - Make Graphviz buildable as a cmake subproject/subdirectory #1477 - Header not found in Cmake project #2109 ## [2.49.0] – 2021-08-28 ### Added - a very basic C++ API for a subset of the functions in lib/cgraph and lib/gvc, allowing a graph to be rendered from DOT source to a specified format. The new API is available through two new libraries: lib/cgraph++ and lib/gvc++. It is experimental, meaning that it might have breaking changes also in upcoming patch or minor releases (towards #2001) - CMake builds now support an `with_expat` option that allows the support for using HTML-like labels through the optional expat library to be explicitly enabled (default) or disabled - CMake builds now support an with_zlib option that allows the support for raster image compression through the optional zlib library to be explicitly enabled (default) or disabled ### Changed - the CMake build system now enables `-Wextra` when building C++ - some Cgraph functions that take `char*` arguments that they do not modify have been updated to take `const char*` arguments #634 - incorrectly using the `layout` attribute on anything other than a graph now results in a warning about this being invalid #2078 - `edgepaint` accepts more standard `--` prefixed command line arguments and rejects invalid options #1971 - improved detection of Lefty dependencies in the Autotools build system - libexpr rejects printing the time (`%t`) if no format is provided - `-DDATE=…` option in the CMake build system has been removed - the Autotools build system no longer writes the DATE file and the portable source tarball no longer includes this ### Fixed - The attached dot file causes a segfault when processed #2095 - fix typos and update URLs in `edgepaint` usage text and man page - Fix clang's undefined behavior warning in dotLayout - gvpr doesn't build on macOS but MKDEFS_EXECUTABLE points to wrong directory #2101 - the generated gdefs.h header is no longer installed - `ccomps` out-of-memory message no longer incorrectly refers to `gc` - do not abort when `calloc(0, x)` or `calloc(x, 0)` in `gcalloc` return `NULL` - failed Exshort_t type discrimination #1799 - dot manpage is in wrong directory on Windows #1936 - CMake builds fail when when the ltdl library is not available even if the `enable_ltdl` option is `ON` - CMake builds fail when when the optional `zlib` library is not available - fix graph rotation in quartz plugin ## [2.48.0] - 2021-07-17 ### Added - a new C++ test infrastructure based on ctest and Catch2 towards #2002 - support for test coverage analysis with [lcov](http://ltp.sourceforge.net/coverage/lcov.php) and [test coverage visualization in GitLab MRs](https://docs.gitlab.com/ee/user/project/merge_requests/test_coverage_visualization.html) ### Changed - updated Graphviz bug report URL in the Autotools build system - Fix `WIN32` path of `gvc.def` specified in `libgvc_la_LDFLAGS` - the CMake build system now not only checks for Bison, but also ensures the found version is recent enough #1916 ### Fixed - ortho's eqEndSeg incorrectly modifies its arguments #2047 - Autotools enables -Wtrampolines and -Wlogical-op for Clang #2066 - node_distinct_coloring failure due to out-of-memory now reported correctly instead of referring to a failure to open lab_gamut - Fix a typo `GD_LIBS` to `GDLIB_LIBS` in `tclpkg/tcldot/Makefile.am` !2022 - Autotools build system sets libgd variables now instead of incorrectly setting GTK variables - HTML strings used as labels are distinguishable in GXL output by `kind="HTML-like string"` - a Bashism removed from the Autotools build system - when Criterion is available, the `command_line` test binary is no longer built and installed by default, but rather during `make check` - round-tripping a file through ``gv2gxl`` and then ``gxl2gv`` no longer causes HTML-like labels to become non-HTML like labels #517 - fix ODR violation by including the ortho object files in the gvc lib also for CMake and MSbuild #2096 ## [2.47.3] - 2021-06-19 ### Changed - marginally more accurate computations in Smyrna sphere projection - Perl is no longer required to build Graphviz #2067 - nop more reliably returns success and failure exit statuses - implicit 63 character limit on plugin names is removed in GVC - the packaging work flow on CentOS 7 now selects the Python 3 bindings, instead of Python 2 bindings - remove Python 2 bindings #1992 - improved thread-safety in Graphviz bindings Makefile ### Fixed - no longer pass libcommon to the linker twice in mm2gv when building with CMake - Quartz plugin is now compiled with explicit `--tag=CC` to libtool #2065 - out of bounds read when attempting to load a plugin whose name is ≥63 characters - out of bounds read when examining a registered plugin whose name is ≥63 characters - do not `fclose(NULL)` in gvmap - Assertion error when using `dot` in `ortho.c` in `convertSPtoRoute` in graphviz 2.47.2 #2082. This was a regression introduced in 2.47.2. ## [2.47.2] - 2021-05-26 ### Added - CMake option `use_sanitizers` which enables building with address and undefined behavior sanitizer ### Changed - $PATH is no longer assumed to be "/bin:/usr/bin:/usr/local/bin" if unset - test suite no longer assumes `python3` exists #2049 - CMake build system locates Python 3 before calling it - diff and grep are no longer required to build Graphviz on Windows ### Fixed - Uninitialized variable read in delaunay_tri - potentially mismatched format string in tclpkg - `gvToolTred` is now exported from gvc.dll on Windows mirroring the behavior on Unix platforms. ## [2.47.1] - 2021-04-17 ### Changed - More detailed error messages when opening input file fails ### Fixed - Windows build thinks xdg-open can be used to open a web browser #1954 - lab_gamut_data misses a value #1974 - xdot man page does not document some functions #1957 - Superfluous empty `@param` in documentation #1977 - PIC renderer does not work and probably never has #131 - dot conversion to dia format #689 - memory leak of reference-counted HTML strings - Align rank from bottom in dot graph #1339 - Fix for TBbalance attribute code #1980 - HTML parser error with single closing square bracket in table row #1893 - reference counted strings put the HTML bit in the middle of the reference count #1984 - &amp; escape disappearing #797 - miscalculation of minimum rank on large graphs - AddressSanitizer: strcpy-param-overlap in gvconfig_libdir when running dot -c #1994 - fix reuse of va_list in pov rendering ## [2.47.0] - 2021-03-15 ### Changed - The edges in JSON output are ordered now !1728 - remove regex usage #1919 - RxSpencer is no longer a dependency on Windows - gvmap.sh is compatible with POSIX shells in addition to ksh - sed is no longer a build dependency on Windows - SHA256 checksum generation? #1955 ### Fixed - Fix gvpr -? to actually print usage and exit non-zero - gvpr is not built by CMake #1878 - typos in gpcanvas.c #1927 - memory leak in libmingle - private inheritance in IncVPSC #1874 - broken sorting in nearest_neighbor_graph_ann.cpp #1938 - memory leak in ANN bridge - gvpr on Windows does not support absolute paths #1780 - buffer overflow in unflatten - agxbputc macro does not bracket its arguments #1814 ## [2.46.1] - 2021-02-13 ### Added - Support for building against Guile 2.2 - Portable source is now also offered as a .tar.xz ### Changed - CentOS/RHEL 6 is no longer supported - Vestiges of Qt4 support have been removed - C++11 support is now required of the C++ compiler used to build Graphviz - C99 support is now required of the C compiler used to build Graphviz - Question about userout() function in agerror.c #1924 - The minimum version of Python required to run the test suite is 3.6 ### Fixed - memory leak in label construction - gvedit compilation errors out, but works if manually compiled with qt5 #1862 - incorrect HTML BR attribute parsing code #1913 - broken overflow checks in RectArea #1906 - various memory leaks !1699 - Fix bad free in lefty !1709 - typo in pathcross #1926 - Out-of-bounds write caused by incorrect error handling of malloc in genUserdata #1928 - Offer .tar.xz files too #454 - Header file graphviz_version.h has no include guards #1929 - regression: newlines embedded in quoted labels / node names are not preserved in 2.46.0 #1931 - Properly fill graphviz_version.h !1706 ## [2.46.0] - 2021-01-18 ### Added - Cgraph's agxbuf API gained a new function agxbdisown(), for dissociating backing memory from the managed buffer - Build system support for the Elbrus 2000 CPU, thanks to Michael Shigorin ### Changed - Cgraph's agheap() API has been removed - Autotools build system support for eFence has been removed - Building Graphviz with ICC defaults to -O2 instead of -O0 - Build system work arounds for GCC 3 have been removed - Incomplete support for running the test suite under CMake has been removed - Portable source tarballs now use the “ustar” POSIX format - Minimum version of Flex required to build Graphviz is now 2.5.2 - Minimum version of Bison required to build Graphviz is now 3.0 - Minimum version of CMake required to build Graphviz using CMake is now 3.1 ### Fixed - gvpr: line numbers in gvpr errors/warnings are incorrect #1594 - URL typo in patchwork man page - Escaped backslashes are not correctly handled when producing xdot with dot #165 - heap-over-flow(off-by-null) in lib/common/shapes.c #1700 - Windows MSBuild executables have the wrong version #1745 - Cast Overflow at pango_textlayout #1314 - x11 back end segfaults if display is unavailable #1776 - typo in cmd/gvpr/lib/clustg #1781 - Segfault in dot #1783 - Incorrect 'Arrow type "s" unknown' error #1444 - segfault on reading 0x10 #1724 - Null-dereference READ (144736912) #1676 - "Warning! PATH too long installer unable to modify PATH!" using CMake Windows installer and PATH length > 1024 #1770 - gvedit -? gives "option - unrecognized - ignored" instead of showing usage #1813 - lefty is not built for Windows (fixed for MSBuild builds only) #1818 - a failure to detect OpenGL glGenTextures() errors has been corrected - sfio does compile time benchmarknig #1422 - iffe "lib" check always succeeds when compiler optimises #1521 - syntax error near text who is not present #1411 - Explicitly links with libstdc++; should allow libc++ if appropriate #163 - A macOS file that was erroneously excluded from portable source tarballs has been restored - Add option -? for usage to diffimg - Add option -? for usage to dotty - Add option -? for usage to lneato - Add option -? for usage to vimdot - Fix smyrna -? to actually print usage instead of error - Fix edgepaint -? to actually print usage instead of error - Remove '"' from usage text in non-Windows version of dotty - Correct misspelled 'smyrna' in usage - Fix edgepaint -o option - Correct shebang of gvmap.sh to use ksh - Fix gvmap.sh -? option to exit with zero exit status - Graphviz doesn't build on MacOS with the latest libc++ #1785 - make fails if ps2pdf is not installed (using autotools) #1763 - multiple graphs to file output causes a segfault #1845 - lefty PTY functionality relies on file descriptor implementation details #1823 - buffer overflow in fdpgen - Crashes by VRML output when current directory is not writable #793 - Segmentation fault when newrank=true #1221 - sfdp craches #236 - fdp segmentation fault with GK=0 #1290 - fdp crash #1865 - Graphviz always crash with this simple dot file #167 - Seg fault in dot #1771 - gml2gv doesn't handle some attributes correctly #1869 - Add missing circo, fdp, neato, osage, patchwork, sfdp & twopi tools to Windows builds (copies of dot) - Add gv2gml tool to CMake (copy of gml2gv on Windows, symlink to gml2gv otherwise) - Regression: fdp generates internal names in the output #1876 - Regression: fdp assertion error on cluster in edge #1877 - Regression in id / <title> in svg for twopi #1907
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