Unable to build openconnect on Mac OS 10.15

I got following error when trying to compile

  CCLD     libopenconnect.la
Undefined symbols for architecture x86_64:
  "___darwin_check_fd_set_overflow", referenced from:
      _cancellable_connect in libopenconnect_la-ssl.o
      _cmd_fd_set in libopenconnect_la-ssl.o
      _check_cmd_fd in libopenconnect_la-ssl.o
      _poll_cmd_fd in libopenconnect_la-ssl.o
      _cancellable_recv in libopenconnect_la-ssl.o
      _cancellable_send in libopenconnect_la-ssl.o
      _tun_mainloop in libopenconnect_la-mainloop.o
      ...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [libopenconnect.la] Error 1
make[1]: *** [libopenconnect.la] Error 1
make: *** [all] Error 2

using these commands

brew install pkg-config gettext openssl autoconf automake libtool
./configure --with-vpnc-script=vpnc or  ./configure --with-vpnc-script=vpnc --without-gnutls --with-openssl

GnuTLS version 3.6.13 OpenSSL version 1.1.1g

changed the description

https://github.com/mono/mono/issues/19393#issuecomment-613639641 ?

If I'm interpreting that right, then removing -no_weak_imports from the generated Makefile should allow it to build.

Testing this may be as simple as running ./configure normally, and then post-processing to remove references to -no-weak-imports:

perl -i -pe 's|-Wl,-no-weak-imports(\s)|\1|g; s|-Wl(\S*),-no-weak-imports(\S*)|-Wl\1\2|g' Makefile

Didn't find any -no-weak-imports in the Makefile after ./configure.

changed title from Unable to build openconnect on Mac OS 15 to Unable to build openconnect on Mac OS 10.15

Upgrading Xcode from 11.2 to 11.4.1 solves this issue.

closed

mentioned in issue #302

mentioned in issue #651