Add gcc version ceiling verification before building k-NN on arm64 (#987

) (#988)

* Add gcc version ceiling verification before building k-NN on arm64

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>

* Add more comments

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>

---------

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>
(cherry picked from commit afdf125)

Co-authored-by: Peter Zhu <zhujiaxi@amazon.com>

scripts/build.sh

@@ -106,6 +106,7 @@ if [ "$JAVA_HOME" = "" ]; then
 fi
 
 # Ensure gcc version is above 4.9.0 for faiss 1.7.4+ compilation
+# https://github.com/opensearch-project/k-NN/issues/975
 GCC_VERSION=`gcc --version | head -n 1 | cut -d ' ' -f3`
 GCC_REQUIRED_VERSION=4.9.0
 COMPARE_VERSION=`echo $GCC_REQUIRED_VERSION $GCC_VERSION | tr ' ' '\n' | sort -V | uniq | head -n 1`
@@ -114,6 +115,16 @@ if [ ! "$COMPARE_VERSION" = "$GCC_REQUIRED_VERSION" ]; then
     exit 1
 fi
 
+# Ensure gcc version is below 8.0.0 for faiss 1.7.4+ compilation so it will not crash on arm64 CentOS7
+# https://github.com/opensearch-project/k-NN/issues/975
+GCC_REQUIRED_VERSION_CEILING=8.0.0
+COMPARE_VERSION_CEILING=`echo $GCC_REQUIRED_VERSION_CEILING $GCC_VERSION | tr ' ' '\n' | sort -V | uniq | tail -n 1`
+if [ ! "$COMPARE_VERSION_CEILING" = "$GCC_REQUIRED_VERSION_CEILING" ]; then
+    echo "gcc version on this env is newer than $GCC_REQUIRED_VERSION_CEILING, exit 1"
+    exit 1
+fi
+
+
 # Build k-NN lib and plugin through gradle tasks
 cd $work_dir
 # Gradle build is used here to replace gradle assemble due to build will also call cmake and make before generating jars