Attempt to fix GLib driver build issues

Author: alinaliBQ

cpp/src/arrow/flight/sql/odbc/flight_sql/flight_sql_statement_get_columns.h

@@ -15,6 +15,8 @@
 // specific language governing permissions and limitations
 // under the License.
 
+#pragma once
+
 #include <optional>
 #include "arrow/array/builder_binary.h"
 #include "arrow/array/builder_primitive.h"

cpp/src/arrow/flight/sql/odbc/flight_sql/flight_sql_statement_get_type_info.h

@@ -15,6 +15,8 @@
 // specific language governing permissions and limitations
 // under the License.
 
+#pragma once
+
 #include <optional>
 #include "arrow/array/builder_binary.h"
 #include "arrow/array/builder_primitive.h"

cpp/src/arrow/flight/sql/odbc/flight_sql/utils.h

@@ -41,7 +41,7 @@ inline void ThrowIfNotOK(const arrow::Status& status) {
 
 template <typename T, typename AttributeTypeT>
 inline bool CheckIfSetToOnlyValidValue(const AttributeTypeT& value, T allowed_value) {
-  return boost::get<T>(value) == allowed_value;
+  return ::boost::get<T>(value) == allowed_value;
 }
 
 template <typename BUILDER, typename T>