build: Skip i686 build by default in guix and gitian

Author: MarcoFalke

contrib/gitian-descriptors/gitian-linux.yml

@@ -40,7 +40,7 @@ script: |
   set -e -o pipefail
 
   WRAP_DIR=$HOME/wrapped
-  HOSTS="i686-pc-linux-gnu x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu"
+  HOSTS="x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu"
   CONFIGFLAGS="--enable-glibc-back-compat --enable-reduce-exports --disable-bench --disable-gui-tests"
   FAKETIME_HOST_PROGS="gcc g++"
   FAKETIME_PROGS="date ar ranlib nm"

contrib/guix/README.md

@@ -114,7 +114,7 @@ find output/ -type f -print0 | sort -z | xargs -r0 sha256sum
 * _**HOSTS**_
 
   Override the space-separated list of platform triples for which to perform a
-  bootstrappable build. _(defaults to "i686-linux-gnu x86\_64-linux-gnu
+  bootstrappable build. _(defaults to "x86\_64-linux-gnu
   arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu")_
 
   > Windows and OS X platform triplet support are WIP.

contrib/guix/guix-build.sh

@@ -20,7 +20,7 @@ time-machine() {
 }
 
 # Deterministically build Bitcoin Core for HOSTs (overriable by environment)
-for host in ${HOSTS=i686-linux-gnu x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu}; do
+for host in ${HOSTS=x86_64-linux-gnu arm-linux-gnueabihf aarch64-linux-gnu riscv64-linux-gnu}; do
 
     # Display proper warning when the user interrupts the build
     trap 'echo "** INT received while building ${host}, you may want to clean up the relevant output and distsrc-* directories before rebuilding"' INT

doc/release-process.md

@@ -268,7 +268,6 @@ The list of files should be:
 ```
 bitcoin-${VERSION}-aarch64-linux-gnu.tar.gz
 bitcoin-${VERSION}-arm-linux-gnueabihf.tar.gz
-bitcoin-${VERSION}-i686-pc-linux-gnu.tar.gz
 bitcoin-${VERSION}-riscv64-linux-gnu.tar.gz
 bitcoin-${VERSION}-x86_64-linux-gnu.tar.gz
 bitcoin-${VERSION}-osx64.tar.gz