1 # Copyright (c) The Bitcoin Core developers
2 # Distributed under the MIT software license, see the accompanying
3 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 5 # compat_find.cmake -- compatibility workarounds meant to be included before
6 # cmake find_package() calls are made
7 8 # Set FOUND_LIBATOMIC to work around bug in Debian capnproto package that is
9 # Debian-specific and does not happen upstream. Debian includes a patch
10 # https://sources.debian.org/patches/capnproto/1.0.1-4/07_libatomic.patch/ which
11 # uses check_library_exists(atomic __atomic_load_8 ...) and it fails because the
12 # symbol name conflicts with a compiler intrinsic as described
13 # https://github.com/bitcoin-core/libmultiprocess/issues/68#issuecomment-1135150171.
14 # This could be fixed by improving the check_library_exists function as
15 # described in the github comment, or by changing the Debian patch to check for
16 # the symbol a different way, but simplest thing to do is work around the
17 # problem by setting FOUND_LIBATOMIC. This problem has probably not
18 # been noticed upstream because it only affects CMake packages depending on
19 # capnproto, not autoconf packages.
20 set(FOUND_LIBATOMIC TRUE)
21