python3: bundle libffi for GNU/Linux builds

CPython commit f40d4ddff3c800b3c956a5e8820aabe3aa87cddd "Closes #27979:
Remove bundled copy of libffi" causes a bit of a problem because it
turns out that libffi isn't all that stable; there's libffi.so.5 on
CentOS 6, libffi.so.6 on CentOS 7 and libffi.so.7 on
lo_daily_update_gandalf tinderbox.

So we have to bundle it in LO; it's only used on GNU/Linux currently.

CPython commit 32119e10b792ad7ee4e5f951a2d89ddbaf111cc5 "bpo-35947:
Update Windows to the current version of libffi (GH-11797)" also removes
the libffi for MSVC, so in a future python upgrade we will have to build
libffi for MSVC too.

The libffi fork for MacOSX is still in CPython git master.

(regression from b10be5d48433076f0b7238d818020f708553e114)

Change-Id: Ibc20cf8cd3614cf9941b6970662bd930496776b2
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/86493
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@cib.de>
(cherry picked from commit 79084665f0e351a3f83fdee88071919f05ec9cc3)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/86500
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/bin/check-elf-dynamic-objects b/bin/check-elf-dynamic-objects
index d1b7ab5522f4..c619fc0cdfc5 100755
--- a/bin/check-elf-dynamic-objects
+++ b/bin/check-elf-dynamic-objects
@@ -111,9 +111,6 @@ local file="$1"
             # skip the majority of files, no ELF binaries here
             skip=1
         ;;
-        */_ctypes.cpython-*.so)
-            whitelist="${whitelist} libffi.so.6" # TODO dubious?
-        ;;
         */_uuid.cpython-*.so)
             whitelist="${whitelist} libuuid.so.1"
         ;;