backport https://gitlab.gnome.org/GNOME/easytag/-/commit/3f753f8.patch
rebased and modified to keep compatibility w/ taglib-1
see https://bugs.gentoo.org/982733
fix taglib-2 w/ 32-bits architecture
--- a/src/tags/gio_wrapper.cc
+++ b/src/tags/gio_wrapper.cc
@@ -48,7 +48,7 @@ GIO_InputStream::name () const
 
 TagLib::ByteVector
 #if (TAGLIB_MAJOR_VERSION == 2)
-GIO_InputStream::readBlock (ulong len)
+GIO_InputStream::readBlock (size_t len)
 #else
 GIO_InputStream::readBlock (TagLib::ulong len)
 #endif
@@ -109,7 +109,11 @@ GIO_InputStream::isOpen () const
 }
 
 void
+#if (TAGLIB_MAJOR_VERSION == 2)
+GIO_InputStream::seek (TagLib::offset_t offset, TagLib::IOStream::Position p)
+#else
 GIO_InputStream::seek (long int offset, TagLib::IOStream::Position p)
+#endif
 {
     if (error)
     {
@@ -147,13 +151,21 @@ GIO_InputStream::clear ()
     }
 }
 
+#if (TAGLIB_MAJOR_VERSION == 2)
+TagLib::offset_t
+#else
 long int
+#endif
 GIO_InputStream::tell () const
 {
     return g_seekable_tell (G_SEEKABLE (stream));
 }
 
+#if (TAGLIB_MAJOR_VERSION == 2)
+TagLib::offset_t
+#else
 long int
+#endif
 GIO_InputStream::length ()
 {
     if (error)
@@ -175,7 +187,11 @@ GIO_InputStream::length ()
 }
 
 void
+#if (TAGLIB_MAJOR_VERSION == 2)
+GIO_InputStream::truncate (TagLib::offset_t len)
+#else
 GIO_InputStream::truncate (long int len)
+#endif
 {
     g_warning ("%s", "Trying to truncate read-only file");
 }
@@ -215,7 +231,7 @@ GIO_IOStream::name () const
 
 TagLib::ByteVector
 #if (TAGLIB_MAJOR_VERSION == 2)
-GIO_IOStream::readBlock (ulong len)
+GIO_IOStream::readBlock (size_t len)
 #else
 GIO_IOStream::readBlock (TagLib::ulong len)
 #endif
@@ -430,7 +446,11 @@ GIO_IOStream::isOpen () const
 }
 
 void
+#if (TAGLIB_MAJOR_VERSION == 2)
+GIO_IOStream::seek (TagLib::offset_t offset, TagLib::IOStream::Position p)
+#else
 GIO_IOStream::seek (long int offset, TagLib::IOStream::Position p)
+#endif
 {
     if (error)
     {
@@ -464,13 +484,21 @@ GIO_IOStream::clear ()
     g_clear_error (&error);
 }
 
+#if (TAGLIB_MAJOR_VERSION == 2)
+TagLib::offset_t
+#else
 long int
+#endif
 GIO_IOStream::tell () const
 {
     return g_seekable_tell (G_SEEKABLE (stream));
 }
 
+#if (TAGLIB_MAJOR_VERSION == 2)
+TagLib::offset_t
+#else
 long int
+#endif
 GIO_IOStream::length ()
 {
     long rv = -1;
@@ -494,7 +522,11 @@ GIO_IOStream::length ()
 }
 
 void
+#if (TAGLIB_MAJOR_VERSION == 2)
+GIO_IOStream::truncate (TagLib::offset_t len)
+#else
 GIO_IOStream::truncate (long int len)
+#endif
 {
     if (error)
     {
--- a/src/tags/gio_wrapper.h
+++ b/src/tags/gio_wrapper.h
@@ -34,7 +34,7 @@ public:
     virtual ~GIO_InputStream ();
     virtual TagLib::FileName name () const;
 #if (TAGLIB_MAJOR_VERSION == 2)
-    virtual TagLib::ByteVector readBlock (ulong length);
+    virtual TagLib::ByteVector readBlock (size_t length);
     virtual void writeBlock (TagLib::ByteVector const &data);
     virtual void insert (TagLib::ByteVector const &data, TagLib::offset_t start = 0, size_t replace = 0);
     virtual void removeBlock (TagLib::offset_t start = 0, size_t length = 0);
@@ -46,11 +46,19 @@ public:
 #endif
     virtual bool readOnly () const;
     virtual bool isOpen () const;
+#if (TAGLIB_MAJOR_VERSION == 2)
+    virtual void seek (TagLib::offset_t offset, TagLib::IOStream::Position p = TagLib::IOStream::Beginning);
+    virtual void clear ();
+    virtual TagLib::offset_t tell () const;
+    virtual TagLib::offset_t length ();
+    virtual void truncate (TagLib::offset_t length);
+#else
     virtual void seek (long int offset, TagLib::IOStream::Position p = TagLib::IOStream::Beginning);
     virtual void clear ();
     virtual long int tell () const;
     virtual long int length ();
     virtual void truncate (long int length);
+#endif
 
     virtual const GError *getError() const;
 
@@ -69,7 +77,7 @@ public:
     virtual ~GIO_IOStream ();
     virtual TagLib::FileName name () const;
 #if (TAGLIB_MAJOR_VERSION == 2)
-    virtual TagLib::ByteVector readBlock (ulong length);
+    virtual TagLib::ByteVector readBlock (size_t length);
     virtual void writeBlock (TagLib::ByteVector const &data);
     virtual void insert (TagLib::ByteVector const &data, TagLib::offset_t start = 0, size_t replace = 0);
     virtual void removeBlock (TagLib::offset_t start = 0, size_t len = 0);
@@ -81,11 +89,19 @@ public:
 #endif
     virtual bool readOnly () const;
     virtual bool isOpen () const;
+#if (TAGLIB_MAJOR_VERSION == 2)
+    virtual void seek (TagLib::offset_t offset, TagLib::IOStream::Position p = TagLib::IOStream::Beginning);
+    virtual void clear ();
+    virtual TagLib::offset_t tell () const;
+    virtual TagLib::offset_t length ();
+    virtual void truncate (TagLib::offset_t length);
+#else
     virtual void seek (long int offset, TagLib::IOStream::Position p = TagLib::IOStream::Beginning);
     virtual void clear ();
     virtual long int tell () const;
     virtual long int length ();
     virtual void truncate (long int length);
+#endif
 
     virtual const GError *getError() const;