<execution> requires TBB, as documented: https://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2017
"Note 3: The Parallel Algorithms have an external dependency on Intel TBB 2018 or later. If the <execution> header is included then -ltbb must be used to link to TBB." If you use the parallel algos (or just include their headers) then the TBB headers are included. That's by design, they don't work otherwise. We can't do anythign about the fact that Intel deprecated their own API shortly after using contributing the PSTL headers to GCC, which depend on that API. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to tbb in Ubuntu. https://bugs.launchpad.net/bugs/1933775 Title: libgcc-s1 and libstdc++6 depend on broken libtbb2 package Status in gcc: In Progress Status in tbb package in Ubuntu: New Bug description: The gcc-11 source package produces libgcc-s1 and (I think?) libstdc++6. Both of these binary packages on Hirsute depend on libtbb2 version 2020.3-1. The latter contains deprecated APIs that create #pragma generated warnings whenever <execution> is included. See upstream for discussion: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101228 To manage notifications about this bug go to: https://bugs.launchpad.net/gcc/+bug/1933775/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
