try to fix windows build

Author: wgtmac

src/arrow/CMakeLists.txt

@@ -59,6 +59,8 @@ list(APPEND
 add_iceberg_lib(iceberg_arrow
                 SOURCES
                 ${ICEBERG_ARROW_SOURCES}
+                OUTPUTS
+                ICEBERG_ARROW_LIBRARIES
                 PRIVATE_INCLUDES
                 ${ICEBERG_ARROW_INCLUDES}
                 SHARED_LINK_LIBS
@@ -70,5 +72,13 @@ add_iceberg_lib(iceberg_arrow
                 SHARED_INSTALL_INTERFACE_LIBS
                 ${ICEBERG_ARROW_SHARED_INSTALL_INTERFACE_LIBS})
 
+if(ICEBERG_BUILD_STATIC AND WIN32)
+  target_compile_definitions(iceberg_arrow_static PUBLIC ICEBERG_ARROW_STATIC)
+endif()
+
+foreach(LIB_TARGET ${ICEBERG_ARROW_LIBRARIES})
+  target_compile_definitions(${LIB_TARGET} PRIVATE ICEBERG_ARROW_EXPORTING)
+endforeach()
+
 install(FILES "${CMAKE_CURRENT_SOURCE_DIR}/demo_arrow.h"
         DESTINATION "${ICEBERG_INSTALL_INCLUDEDIR}/iceberg/arrow")

src/arrow/demo_arrow.h

@@ -21,9 +21,23 @@
 
 #include <string>
 
+#ifdef _WIN32
+#  ifdef ICEBERG_ARROW_STATIC
+#    define ICEBERG_ARROW_EXPORT
+#  else
+#    ifdef ICEBERG_ARROW_EXPORTING
+#      define ICEBERG_ARROW_EXPORT __declspec(dllexport)
+#    else
+#      define ICEBERG_ARROW_EXPORT __declspec(dllimport)
+#    endif
+#  endif
+#else
+#  define ICEBERG_ARROW_EXPORT
+#endif
+
 namespace iceberg::arrow {
 
-class DemoArrow {
+class ICEBERG_ARROW_EXPORT DemoArrow {
  public:
   std::string print() const;
 };