Python binding rebuilds whole libtorrent, it should reuse pre-installed libtorrent

[yurivict]

Building in bindings/python fails to find libtorrent-rasterbar-2.0.2 installed in the system.

How to make build use preinstalled libtorrent-rasterbar?

[arvidn]

if you're invoking b2 directly, add libtorrent-link=prebuilt to the command line.

If you're calling setup.py, you can specify --libtorrent-link=prebuilt (or --b2-args="libtorrent-link=prebuilt")

[arvidn]

note that setup.py is sensitive to argument order. You need to specify build first, then the arguments to the build step, and if you want to install as well, the install command has to come after the build options

[yurivict]

Both variants fail like this:

/usr/bin/env XDG_DATA_HOME=/usr/ports/net-p2p/py-libtorrent-rasterbar/work-py37 XDG_CONFIG_HOME=/usr/ports/net-p2p/py-libtorrent-rasterbar/work-py37 HOME=/usr/ports/net-p2p/py-libtorrent-rasterbar/work-py37 PATH=/usr/ports/net-p2p/py-libtorrent-rasterbar/work-py37/.bin:/home/yuri/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin NO_PIE=yes MK_DEBUG_FILES=no MK_KERNEL_SYMBOLS=no SHELL=/bin/sh NO_LINT=YES LDSHARED=cc -shared PYTHONDONTWRITEBYTECODE= PYTHONOPTIMIZE= PREFIX=/usr/local LOCALBASE=/usr/local CC=cc CFLAGS=-O2 -pipe -fno-omit-frame-pointer  -DTORRENT_DISABLE_LOGGING -fPIC -DLIBICONV_PLUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  CPP=cpp CPPFLAGS=-fno-omit-frame-pointer -DLIBICONV_PLUG -isystem /usr/local/include LDFLAGS= -fstack-protector-strong -L/usr/local/lib  LIBS= CXX=c++ CXXFLAGS=-O2 -pipe -fno-omit-frame-pointer -DTORRENT_DISABLE_LOGGING -fPIC -DLIBICONV_PLUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing -fno-omit-frame-pointer  -DLIBICONV_PLUG -isystem /usr/local/include  MANPREFIX=/usr/local BSD_INSTALL_PROGRAM=install  -s -m 555 BSD_INSTALL_LIB=install  -s -m 0644 BSD_INSTALL_SCRIPT=install  -m 555 BSD_INSTALL_DATA=install  -m 0644 BSD_INSTALL_MAN=install  -m 444 /usr/local/bin/python3.7 -c import sys; import setuptools;  __file__='setup.py'; sys.argv[0]='setup.py';  exec(compile(open(__file__, 'rb').read().replace(b'\r\n', b'\n'), __file__, 'exec')) build --b2-args=libtorrent-link=prebuilt
usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: setup.py --help [cmd1 cmd2 ...]
   or: setup.py --help-commands
   or: setup.py cmd --help

error: option --b2-args not recognized
*** Error code 1

[arvidn]

the --b2-args option was added after the 2.0.2 release and is currently only available in git. However, --libotrrent-link should be available for the build_ext command (I was wrong about that name earlier):

$ python3 setup.py build_ext --libtorrent-link=prebuilt

I'm hitting a different issue on linux with that right now though. I'm looking

[arvidn]

I believe this fixes it: #6018