ci: Switch multiprocess to i686 build

Author: MarcoFalke

.cirrus.yml

@@ -235,7 +235,7 @@ task:
     FILE_ENV: "./ci/test/00_setup_env_native_fuzz.sh"
 
 task:
-  name: '[multiprocess, DEBUG] [focal]'
+  name: '[multiprocess, i686, DEBUG] [focal]'
   << : *GLOBAL_TASK_TEMPLATE
   container:
     image: ubuntu:focal
@@ -244,7 +244,7 @@ task:
   env:
     << : *CIRRUS_EPHEMERAL_WORKER_TEMPLATE_ENV
     MAKEJOBS: "-j8"
-    FILE_ENV: "./ci/test/00_setup_env_native_multiprocess.sh"
+    FILE_ENV: "./ci/test/00_setup_env_i686_multiprocess.sh"
 
 task:
   name: '[no wallet] [bionic]'

ci/test/00_setup_env_native_multiprocess.sh renamed to ci/test/00_setup_env_i686_multiprocess.sh

@@ -6,11 +6,12 @@
 
 export LC_ALL=C.UTF-8
 
-export CONTAINER_NAME=ci_native_multiprocess
+export HOST=i686-pc-linux-gnu
+export CONTAINER_NAME=ci_i686_multiprocess
 export DOCKER_NAME_TAG=ubuntu:20.04
-export PACKAGES="cmake python3 python3-pip llvm clang"
+export PACKAGES="cmake python3 python3-pip llvm clang g++-multilib"
 export DEP_OPTS="DEBUG=1 MULTIPROCESS=1"
 export GOAL="install"
-export BITCOIN_CONFIG="--enable-debug CC=clang CXX=clang++"  # Use clang to avoid OOM
+export BITCOIN_CONFIG="--enable-debug CC='clang -m32' CXX='clang++ -m32' LDFLAGS='--rtlib=compiler-rt -lgcc_s'"
 export TEST_RUNNER_ENV="BITCOIND=bitcoin-node"
 export PIP_PACKAGES="lief"