Fix C++ SDK package ABI verification

Author: hongzhi-gao

.github/scripts/package-client-cpp-manylinux-glibc217.sh

@@ -95,6 +95,14 @@ fi
 
 echo "glibc compatibility check passed (max=${max_glibc} <= 2.17)"
 
+echo "=== CXX11 ABI symbols in libiotdb_session.so ==="
+abi_symbols=$(nm -D --demangle "${SO}" | grep -E 'Session::setStorageGroup\(std::__cxx11::basic_string|SessionDataSet::getColumnNames\[abi:cxx11\]|RowRecord::toString\[abi:cxx11\]' || true)
+if [[ -z "${abi_symbols}" ]]; then
+  echo "ERROR: libiotdb_session.so was not built with _GLIBCXX_USE_CXX11_ABI=1"
+  exit 1
+fi
+printf '%s\n' "${abi_symbols}" | head -20
+
 echo "=== Example package build/link/run smoke test ==="
 PKG_ZIP=$(find "${GITHUB_WORKSPACE}/iotdb-client/client-cpp/target" -maxdepth 1 -type f -name "iotdb-session-cpp-*-${PACKAGE_CLASSIFIER}.zip" -print -quit)
 if [[ -z "${PKG_ZIP}" ]]; then

iotdb-client/client-cpp/cmake/iotdb-session-config.cmake.in

@@ -34,9 +34,10 @@ if(NOT TARGET IoTDB::iotdb_session)
     add_library(IoTDB::iotdb_session SHARED IMPORTED)
     set_target_properties(IoTDB::iotdb_session PROPERTIES
             INTERFACE_INCLUDE_DIRECTORIES "${_IOTDB_SESSION_PACKAGE_ROOT}/include")
-    if("@IOTDB_SESSION_CXX11_ABI_COMPILE_DEFINITION@")
+    set(_IOTDB_SESSION_CXX11_ABI_COMPILE_DEFINITION "@IOTDB_SESSION_CXX11_ABI_COMPILE_DEFINITION@")
+    if(_IOTDB_SESSION_CXX11_ABI_COMPILE_DEFINITION)
         set_target_properties(IoTDB::iotdb_session PROPERTIES
-                INTERFACE_COMPILE_DEFINITIONS "@IOTDB_SESSION_CXX11_ABI_COMPILE_DEFINITION@")
+                INTERFACE_COMPILE_DEFINITIONS "${_IOTDB_SESSION_CXX11_ABI_COMPILE_DEFINITION}")
     endif()
     if(UNIX)
         set_target_properties(IoTDB::iotdb_session PROPERTIES

iotdb-client/client-cpp/examples/CMakeLists.txt

@@ -78,7 +78,9 @@ ELSE()
 ENDIF()
 
 if(NOT _iotdb_examples_in_tree)
-    find_package(iotdb-session CONFIG QUIET PATHS "${IOTDB_SDK_ROOT}" NO_DEFAULT_PATH)
+    find_package(iotdb-session CONFIG QUIET
+        PATHS "${IOTDB_SDK_ROOT}/cmake" "${IOTDB_SDK_ROOT}"
+        NO_DEFAULT_PATH)
     if(WIN32)
         set(_iotdb_link_lib "${IOTDB_SDK_ROOT}/lib/iotdb_session.lib")
         set(_iotdb_runtime   "${IOTDB_SDK_ROOT}/lib/iotdb_session.dll")