本文深入探讨了Tcl脚本的执行原理，特别是解释了如何通过兼容性技巧避免解释器产生的恼人错误。文章详细解析了#!/bin/sh 和 exec 命令在Tcl脚本中的作用，为初学者提供了清晰的指导。
For Tcl beginner as me it's hard to understand the below pieces of code.
#!/bin/sh
exec /some/very/long/path/to/tclsh "$0" "$@"
# ... Tcl script goes here ...Acturally after go through some books, that's is all about compatiable stuff, trying to avoid some annoying errors from the interperter. We can just treat it as a ordinary method to run a Tcl script. No magic at all. If you want to know the history thing please check the below materials:
Books: Tcl Basics.
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