i386 build

.travis.yml

@@ -8,6 +8,7 @@ env:
     - CC=gcc ARCH_SUFFIX=amd64 ARCH_NATIVE=1 NO_ARGS=
     - CC=arm-linux-gnueabihf-gcc ARCH_SUFFIX=armhf ARCH_NATIVE= NO_ARGS=
     - CC=aarch64-linux-gnu-gcc ARCH_SUFFIX=arm64 ARCH_NATIVE= NO_ARGS=
+    - CFLAGS="-m32" ARCH_SUFFIX=i386 ARCH_NATIVE= NO_ARGS=
     - CC=gcc ARCH_SUFFIX=amd64 ARCH_NATIVE=1 NO_ARGS=1
   global:
     - SIGN_BINARIES=1

ci/install_deps.sh

@@ -9,6 +9,7 @@ apt-get install --no-install-recommends --yes \
   python-dev libcap-dev python-pip python-virtualenv \
   hardening-includes gnupg vim-common \
   gcc-aarch64-linux-gnu binutils-aarch64-linux-gnu libc6-dev-arm64-cross \
-  gcc-arm-linux-gnueabihf binutils-arm-linux-gnueabi libc6-dev-armhf-cross
+  gcc-arm-linux-gnueabihf binutils-arm-linux-gnueabi libc6-dev-armhf-cross \
+  libc6-dev-i386  gcc-multilib
 
 rm -rf /var/lib/apt/lists/*

ci/run_build.sh

@@ -27,13 +27,11 @@ export BUILD_DIR="$(readlink -f "${BUILD_DIR}")"
 : ${FORCE_SUBREAPER:="1"}
 export FORCE_SUBREAPER
 
-
 # Our build platform doesn't have those newer Linux flags, but we want Tini to have subreaper support
 # We also use those in our tests
-CFLAGS="-DPR_SET_CHILD_SUBREAPER=36 -DPR_GET_CHILD_SUBREAPER=37"
 if [[ "${FORCE_SUBREAPER}" -eq 1 ]]; then
   # If FORCE_SUBREAPER is requested, then we set those CFLAGS for the Tini build
-  export CFLAGS
+  export CFLAGS="-DPR_SET_CHILD_SUBREAPER=36 -DPR_GET_CHILD_SUBREAPER=37 ${CFLAGS:-}"
 fi
 
 # Ensure Python output is not buffered (to make tests output clearer)

ddist.sh

@@ -22,6 +22,7 @@ docker run -it --rm \
   -e FORCE_SUBREAPER="${FORCE_SUBREAPER:="1"}" \
   -e GPG_PASSPHRASE="${GPG_PASSPHRASE:=}" \
   -e CC="${CC:=gcc}" \
+  -e CFLAGS="${CFLAGS-}" \
   -e ARCH_NATIVE="${ARCH_NATIVE-1}" \
   -e ARCH_SUFFIX="${ARCH_SUFFIX-}" \
   -e NO_ARGS="${NO_ARGS-}" \