3 files changed, 81 insertions, 1 deletions
diff --git a/.github/workflows/linux_gcc_32bit.yml b/.github/workflows/linux_gcc_32bit.yml
new file mode 100644
index 00000000..455bf301
--- /dev/null
+++ b/.github/workflows/linux_gcc_32bit.yml
@@ -0,0 +1,24 @@
+name: Linux GCC 32bit
+
+on: [push, pull_request]
+
+jobs:
+
+  linux_gcc_32bit:
+    runs-on: ubuntu-latest
+    if: "!contains(github.event.head_commit.message, '[ci skip]') && !contains(github.event.head_commit.message, '[skip ci]')"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Cache
+        uses: actions/cache@v2
+        id: cache
+        with:
+          path: |
+                ${{ github.workspace }}/ccache.tar.gz
+          key: ${{ runner.os }}-cache-gcc32bit-${{ github.run_id }}
+          restore-keys: ${{ runner.os }}-cache-gcc32bit-
+
+      - name: Run
+        run: docker run -e CI -e WORK_DIR="$PWD" -v $PWD:$PWD ubuntu:20.04 $PWD/.github/workflows/linux_gcc_32bit/start.sh
diff --git a/.github/workflows/linux_gcc_32bit/start.sh b/.github/workflows/linux_gcc_32bit/start.sh
new file mode 100755
index 00000000..42746fe8
--- /dev/null
+++ b/.github/workflows/linux_gcc_32bit/start.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+
+set -e
+
+export TRAVIS_OS_NAME=linux
+export BUILD_NAME=linux_gcc_32bit
+export TRAVIS_BUILD_DIR="$WORK_DIR"
+
+ARCH=i386
+
+dpkg --add-architecture i386
+apt update -y
+
+DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    autoconf automake libtool gcc-multilib g++-multilib g++ sqlite3 \
+    python3-pip \
+    make cmake ccache pkg-config tar zip \
+    libsqlite3-dev:$ARCH libtiff-dev:$ARCH libcurl4-openssl-dev:$ARCH \
+    jq
+
+pip3 install --user jsonschema
+export PATH=$HOME/.local/bin:$PATH
+
+export CXXFLAGS='-g -O2 -m32 -D_GLIBCXX_ASSERTIONS'
+export CFLAGS='-g -O2 -m32'
+export TIFF_CFLAGS=-I/usr/include/i386-linux-gnu
+export TIFF_LIBS="-L/usr/lib/i386-linux-gnu -ltiff"
+export SQLITE3_CFLAGS=-I/usr/include/i386-linux-gnu
+export SQLITE3_LIBS="-L/usr/lib/i386-linux-gnu -lsqlite3"
+export CC="ccache gcc"
+export CXX="ccache g++"
+
+NPROC=$(nproc)
+echo "NPROC=${NPROC}"
+export MAKEFLAGS="-j ${NPROC}"
+
+cd "$WORK_DIR"
+
+if test -f "$WORK_DIR/ccache.tar.gz"; then
+    echo "Restoring ccache..."
+    (cd $HOME && tar xzf "$WORK_DIR/ccache.tar.gz")
+fi
+
+export CCACHE_CPP2=yes
+export PROJ_DB_CACHE_DIR="$HOME/.ccache"
+
+ccache -M 500M
+ccache -s
+
+CFLAGS="-Werror $CFLAGS" CXXFLAGS="-Werror $CXXFLAGS" ./travis/install.sh
+
+ccache -s
+
+echo "Saving ccache..."
+rm -f "$WORK_DIR/ccache.tar.gz"
+(cd $HOME && tar czf "$WORK_DIR/ccache.tar.gz" .ccache)
diff --git a/travis/install.sh b/travis/install.sh
index a4d8352a..84e7de25 100755
--- a/travis/install.sh
+++ b/travis/install.sh
@@ -99,7 +99,7 @@ if [ $TRAVIS_OS_NAME != "osx" ]; then
     fi
 fi
 
-if [ "$BUILD_NAME" != "linux_gcc8" ]; then
+if [ "$BUILD_NAME" != "linux_gcc8" -a "$BUILD_NAME" != "linux_gcc_32bit" ]; then
 
     # cmake build from generated tarball
     mkdir build_cmake