--- a/tool/buildtclext.tcl	2024-11-18 14:01:05.040080030 +0800
+++ b/tool/buildtclext.tcl	2024-11-18 14:01:27.998394871 +0800
@@ -232,7 +232,7 @@
 
   # Generate and execute the command with which to do the compilation.
   #
-  set cmd "$CMD tclsqlite3.c -o $OUT $LIBS"
+  set cmd "$CMD tclsqlite3.c -o $OUT $LIBS -lm"
   puts $cmd
   file delete -force $OUT
   catch {exec {*}$cmd} errmsg