NetBSD: Build capnproto package from source

See bitcoin-core/libmultiprocess#196.

Author: hebasto

.github/workflows/netbsd.yml

@@ -49,9 +49,15 @@ jobs:
           envs: 'CCACHE_COMPILERCHECK CCACHE_DIR CCACHE_MAXSIZE'
           prepare: |
             /usr/sbin/pkg_info > packages_before
-            /usr/sbin/pkg_add cmake git-base gcc14 pkg-config ccache boost libevent sqlite3 capnproto zeromq python313 py313-zmq
+            /usr/sbin/pkg_add cmake git-base gcc14 pkgconf ccache boost libevent sqlite3 zeromq python313 py313-zmq
             /usr/sbin/pkg_info > packages_after
             diff -w packages_before packages_after | grep '^>'
+            # See https://github.com/bitcoin-core/libmultiprocess/pull/196.
+            # capnproto build dependencies.
+            /usr/sbin/pkg_add digest libtool-base mktools pkgconf cwrappers
+            /usr/sbin/pkg_admin -K /usr/pkg/pkgdb fetch-pkg-vulnerabilities
+            git clone --depth=1 https://github.com/NetBSD/pkgsrc.git /usr/pkgsrc
+            env -u PKG_PATH make -C /usr/pkgsrc/devel/capnproto/ CPPFLAGS='-DKJ_NO_EXCEPTIONS=0' install
           run: git config --global --add safe.directory ${{ github.workspace }}
           sync: 'rsync'
           copyback: false
@@ -64,14 +70,12 @@ jobs:
           path: ci/nightly
 
       - name: Generate buildsystem
-        # TODO: Reenable IPC.
-        # See: https://github.com/bitcoin-core/libmultiprocess/pull/196.
         run: |
           set -e
           cd ${{ github.workspace }}
           cmake -B build \
             -DCMAKE_C_COMPILER="/usr/pkg/gcc14/bin/gcc" -DCMAKE_CXX_COMPILER="/usr/pkg/gcc14/bin/g++" \
-            -DENABLE_IPC=OFF -DWITH_ZMQ=ON \
+            -DWITH_ZMQ=ON \
             -DBUILD_BENCH=ON -DBUILD_FUZZ_BINARY=ON -DWERROR=ON
           df -h