ardour

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History

luzpaz f4562a9b4c fix various typos throughout codebase Found via `codespell -q 3 -S ".pdf,.po,./.git,.tosc,./waf,./share/patchfiles,./libs,./msvc_extra_headers,./share/web_surfaces,.patch" -L acount,addin,ane,ba,buss,busses,caf,capela,devine,disconnectin,discreet,doubleclick,envolution,filetest,fo,ghandi,homs,hsi,layed,maschine,mis,nd,ontop,pass-thru,removeable,retrn,ro,scrollin,sectionin,seh,siz,sord,sur,te,trough,ue,wth`		2025-01-12 21:08:42 +01:00
..
abicheck.c	fix path to glibmm that we check	2016-08-12 13:46:17 +02:00
Makefile
README	fix various typos throughout codebase	2025-01-12 21:08:42 +01:00
wscript	wscript: drop repeated autowaf.set_options - it is enough to set at top level	2023-10-15 10:47:16 -06:00

README

g++5 ABI test tool
==================

This is a simple tool to test a system for g++5's glibmm at runtime.

GCC5.1 introduced a new ABI for the C++ standard library.
The old 3.4 .. 5.0 ABI is not compatible. By default gcc provides a
dual ABI, so testing libstdc++ itself is not sufficient.


Some GNU/Linux distributions systems switched to the new ABI already
and compile *plugins* with the new gcc.

If a plugin uses a c++ library that is also shipped with ardour-bundles,
the ABI of that library must match. Currently known cases: gtkmm, glibmm.

e.g. Ingen or eq10q provided by a distro compiled with gcc5 will not
load in Ardour from ardour.org compiled with gcc4 because ardour
ships an incompatible gtkmm, glibmm, cairomm, ...

Likewise Ardour gcc5-compiled binaries will fail to load plugins that
are compiled with gcc4.

This simiple tool `gcc-glibmm-abi-check` checks for gcc4/gcc5 specific
symbols in libglibmm (a common denominator C++ lib), it is intended
to be run when deploying ardour binaries.


References
----------

https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html
https://wiki.debian.org/GCC5
https://mail.gnome.org/archives/gtkmm-list/2015-June/thread.html