Ensure Linux 32-bit builds in Docker produce 32-bit binaries

Author: adamretter

java/crossbuild/docker-build-linux.sh

@@ -37,16 +37,22 @@ if hash scl 2>/dev/null; then
   fi
 fi
 
+# Detect if 32-bit linux platform with 'linux32' command
+LINUX32=""
+if hash linux32 2>/dev/null; then
+  LINUX32="linux32"
+fi
+
 # Build with devtoolset if available, otherwise use system compiler
 # Add -Wno-error=restrict for GCC 12+ to avoid false positive warnings
 if [ -n "$DEVTOOLSET" ]; then
   echo "Using $DEVTOOLSET"
-  scl enable $DEVTOOLSET "bash -c 'make clean-not-downloaded'"
-  scl enable $DEVTOOLSET "bash -c 'PORTABLE=1 J=$J make -j$J rocksdbjavastatic'"
+  $LINUX32 scl enable $DEVTOOLSET "bash -c 'make clean-not-downloaded'"
+  $LINUX32 scl enable $DEVTOOLSET "bash -c 'PORTABLE=1 J=$J make -j$J rocksdbjavastatic'"
 else
   echo "No SCL devtoolset found, falling back to system compiler"
-  make clean-not-downloaded
-  PORTABLE=1 J=$J make -j$J rocksdbjavastatic
+  $LINUX32 make clean-not-downloaded
+  PORTABLE=1 J=$J $LINUX32 make -j$J rocksdbjavastatic
 fi
 
 cp java/target/librocksdbjni-linux*.so java/target/rocksdbjni-*-linux*.jar java/target/rocksdbjni-*-linux*.jar.sha1 /rocksdb-java-target