chatgui: add --asan flag to build_linux.sh

tools/chatgui/build_linux.sh

@@ -1,6 +1,14 @@
 #!/bin/bash
 set -eo pipefail
 
+ASAN=0
+for arg; do
+    case "$arg" in
+        --asan) ASAN=1 ;;
+        -j*) JOBS="${arg#-j}" ;;
+    esac
+done
+
 # --- dependencies ---
 PKGS="cmake librlottie-dev zlib1g-dev qtbase5-dev libssl-dev"
 MISSING=""
@@ -25,8 +33,21 @@ echo "Build:  $BUILDDIR"
 echo "Jobs:   $JOBS"
 echo ""
 
-[ -f "$BUILDDIR/Makefile" ] || cmake -S "$SRCDIR" -B "$BUILDDIR"
+SAN_FLAGS="-fsanitize=address -fno-omit-frame-pointer -g"
+if [ "$ASAN" -eq 1 ]; then
+    echo "*** ASAN ENABLED ***"
+    CMAKE_ARGS=(-DCMAKE_C_FLAGS="$SAN_FLAGS" -DCMAKE_CXX_FLAGS="$SAN_FLAGS" -DCMAKE_EXE_LINKER_FLAGS=-fsanitize=address)
+    rm -f "$BUILDDIR/CMakeCache.txt" "$BUILDDIR/Makefile"
+else
+    CMAKE_ARGS=()
+fi
+
+[ -f "$BUILDDIR/Makefile" ] || cmake -S "$SRCDIR" -B "$BUILDDIR" "${CMAKE_ARGS[@]}"
 cmake --build "$BUILDDIR" -j"$JOBS"
 
 echo ""
-echo "OK. Run: $BUILDDIR/chatgui"
+if [ "$ASAN" -eq 1 ]; then
+    echo "OK. Run: ASAN_OPTIONS=detect_leaks=1:halt_on_error=0 $BUILDDIR/chatgui"
+else
+    echo "OK. Run: $BUILDDIR/chatgui"
+fi