diff -ur gdcm-3.0.23.orig/Source/MediaStorageAndFileFormat/CMakeLists.txt gdcm-3.0.23/Source/MediaStorageAndFileFormat/CMakeLists.txt
--- gdcm-3.0.23.orig/Source/MediaStorageAndFileFormat/CMakeLists.txt	2024-01-11 07:41:56.800302334 -0500
+++ gdcm-3.0.23/Source/MediaStorageAndFileFormat/CMakeLists.txt	2024-01-11 07:49:28.533961424 -0500
@@ -228,7 +228,7 @@
 if(GDCM_USE_SYSTEM_JSON)
   target_link_libraries(gdcmMSFF LINK_PRIVATE ${JSON_LIBRARIES})
 endif()
-if(UNIX)
+if(UNIX OR MINGW)
   find_package(Iconv)
   target_link_libraries(gdcmMSFF LINK_PRIVATE ${Iconv_LIBRARIES})
 endif()
diff -ur gdcm-3.0.23.orig/Utilities/gdcmext/mec_mr3_io.c gdcm-3.0.23/Utilities/gdcmext/mec_mr3_io.c
--- gdcm-3.0.23.orig/Utilities/gdcmext/mec_mr3_io.c	2024-01-11 07:52:37.007305489 -0500
+++ gdcm-3.0.23/Utilities/gdcmext/mec_mr3_io.c	2024-01-11 07:54:30.411529519 -0500
@@ -138,7 +138,7 @@
 }
 
 static void *aligned_alloc_impl(size_t alignment, size_t size) {
-#ifdef _MSC_VER
+#ifdef _WIN32
   return _aligned_malloc(size, alignment);
 #else
   // return aligned_alloc(alignment, size);
@@ -843,7 +843,7 @@
     good = good && read_group(self, group, nitems, &info, &data);
   }
   // release memory:
-#ifdef _MSC_VER
+#ifdef _WIN32
   _aligned_free(data.buffer);
 #else
   free(data.buffer);