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| author | Boris Pek <tehnick-8@yandex.ru> | 2016-04-28 12:25:01 (GMT) |
|---|---|---|
| committer | Boris Pek <tehnick-8@yandex.ru> | 2016-04-30 19:09:12 (GMT) |
| commit | 282e6b7907c9bf0296c4a697b8b9a29c8353095e (patch) | |
| tree | baa4ddcf3df15bcd3735ac0a46434cca8ad93195 /plugins/gcc6 | |
| parent | 0cbf0b5358084141c883a93f673d5e46c7497def (diff) | |
| download | mxe-282e6b7907c9bf0296c4a697b8b9a29c8353095e.zip mxe-282e6b7907c9bf0296c4a697b8b9a29c8353095e.tar.gz mxe-282e6b7907c9bf0296c4a697b8b9a29c8353095e.tar.bz2 | |
gcc6 plugin: add README.md with notes about new GCC
Diffstat (limited to 'plugins/gcc6')
| -rw-r--r-- | plugins/gcc6/README.md | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/plugins/gcc6/README.md b/plugins/gcc6/README.md new file mode 100644 index 0000000..128a374 --- /dev/null +++ b/plugins/gcc6/README.md @@ -0,0 +1,69 @@ +# Notes about GCC version 6.1.0 and later + +GCC 6.1 is released with a number of major changes +[[1](https://gcc.gnu.org/ml/gcc-announce/2016/msg00000.html)] +[[2](https://gcc.gnu.org/gcc-6/changes.html)] +. The most notable change is: +> The `C++` frontend now defaults to `C++14` standard instead of `C++98` it has +> been defaulting to previously, for compiling older `C++` code that might +> require either explicitly compiling with selected older `C++` standards, +> or might require some code adjustment, see +> [[3](http://gcc.gnu.org/gcc-6/porting_to.html)] +> for details. + +So it is expected that some of MXE packages will fails to build from source +(FTBFS) with default GCC 6.x options. As a workaround we may add `-std=gnu++11` +or `-std=gnu++98` into `CXXFLAGS` for building problematic packages. And this +will not affect the builds with older versions of GCC. + +For example, in autotools based projects: +``` +... +$(PKG)_CXXFLAGS := -std=gnu++11 +... + cd '$(1)' && \ + CXXFLAGS="$($(PKG)_CXXFLAGS)" \ + ./configure \ +... +``` + +Just after adding this plugin (gcc6) some packages were FTBFS: +* boost +* cgal +* dcmtk +* fdk-aac +* fdk-aac +* flann +* freeimage +* glib +* gtkimageview +* gtkmm2 +* gtkmm3 +* itk +* jsoncpp +* json_spirit +* libical +* librsvg +* libxml++ +* log4cxx +* opencv +* ossim +* qt +* qt3d +* sdl_sound +* smpeg2 +* ucl +* vtk +* vtk6 +* wxwidgets + +See logs +[[4](https://gist.github.com/starius/81e25169242155aa3ef6be1a733b9812)] +[[5](https://gist.github.com/c01ef084eeb85781bd1eb7f6b1e12192)] +for details. + +For now, these packages might be already fixed by upstream developers, by +additional patches or using above mentioned workaround. If some MXE packages +or your personal projects are still FTBFS you may look how other packages were +fixed and use similar approach. + |