Small changes:

- Add statistics output example
 - Fix various compilation warnings
 - Test/bump ruby version to 3.2
 - Fix failing test under OSX

FossilOrigin-Name: c5c6d745d854082b8704c8da61dcc315dbc3d99b8ceec4a82ebea65e861f10ea

ext/mdbx_ext/database.c

@@ -857,7 +857,7 @@ static VALUE rmdbx_init_copy( VALUE copy, VALUE orig )
  * Initialization for the MDBX::Database class.
  */
 void
-rmdbx_init_database()
+rmdbx_init_database( void )
 {
 	rmdbx_cDatabase = rb_define_class_under( rmdbx_mMDBX, "Database", rb_cObject );
 

ext/mdbx_ext/extconf.rb

@@ -3,6 +3,8 @@
 
 require 'mkmf'
 
+$CFLAGS << ' -Wno-suggest-attribute=format'
+
 have_library( 'mdbx' )  or abort "No mdbx library!"
 have_header( 'mdbx.h' ) or abort "No mdbx.h header!"
 

ext/mdbx_ext/mdbx_ext.c

@@ -64,7 +64,7 @@ rmdbx_log( const char *level, const char *fmt, va_dcl )
  * MDBX initialization
  */
 void
-Init_mdbx_ext()
+Init_mdbx_ext( void )
 {
 	rmdbx_mMDBX = rb_define_module( "MDBX" );