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34 lines
1.2 KiB
Text
34 lines
1.2 KiB
Text
g++5 ABI test tool
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==================
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This is a simple tool to test a system for g++5's glibmm at runtime.
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GCC5.1 introduced a new ABI for the C++ standard library.
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The old 3.4 .. 5.0 ABI is not compatible. By default gcc provides a
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dual ABI, so testing libstdc++ itself is not sufficient.
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Some GNU/Linux distributions systems switched to the new ABI already
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and compile *plugins* with the new gcc.
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If a plugin uses a c++ library that is also shipped with ardour-bundles,
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the ABI of that library must match. Currently known cases: gtkmm, glibmm.
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e.g. Ingen or eq10q provided by a distro compiled with gcc5 will not
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load in Ardour from ardour.org compiled with gcc4 because ardour
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ships an incompatible gtkmm, glibmm, cairomm, ...
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Likewise Ardour gcc5-compiled binaries will fail to load plugins that
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are compiled with gcc4.
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This simiple tool `gcc-glibmm-abi-check` checks for gcc4/gcc5 specific
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symbols in libglibmm (a common denominator C++ lib), it is intended
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to be run when deploying ardour binaries.
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References
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----------
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https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html
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https://wiki.debian.org/GCC5
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https://mail.gnome.org/archives/gtkmm-list/2015-June/thread.html
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