weird behavior of tclsh

I think I am missing something badly.

I have lappend auto_path in my .tclshrc.
Isn't .tclshrc executed everytime you invoke tclsh?

Why am I getting 2 different outputs (and behaviors) when I do "tclsh
a.tcl" versus invoking tclsh and then sourcing a.tcl?

Thanks in advance,
-Bhushit

bhushit@jungle:/home/bhushit/learn/tcl/graph: head ~/.tclshrc
lappend auto_path <foo>/lib/tcllib
package require control
package require struct

bhushit@jungle:/home/bhushit/learn/tcl/graph: cat temp.tcl
puts $auto_path

bhushit@jungle:/home/bhushit/learn/tcl/graph: tclsh temp.tcl
<bar>/tcl8.3.3/lib/tcl8.3 <bar>/tcl8.3.3/lib /import/tools/lib

BUT

bhushit@jungle:/home/bhushit/learn/tcl/graph: tclsh
=========
8.3:/home/bhushit/learn/tcl/graph:-> source temp.tcl
<bar>/tcl8.3.3/lib/tcl8.3 <bar>/tcl8.3.3/lib /import/tools/lib
<foo>/lib/tcllib <foo>/lib/tcllib/control

Bhushit Joshipura wrote:
> I have lappend auto_path in my .tclshrc.
> Isn't .tclshrc executed everytime you invoke tclsh?

No.

http://www.tcl.tk/man/tcl8.4/UserCmd/tclsh.htm

"There is no automatic evaluation of .tclshrc when the name of a
script file is presented on the tclsh command line, but the script
file can always source it if desired."

--
| Don Porter          Mathematical and Computational Sciences Division |
| donald.porter@nist.gov             Information Technology Laboratory |
| http://math.nist.gov/~DPorter/                                  NIST |
 |_______________________________________
_______________________________|

Bhushit Joshipura wrote:
> I have lappend auto_path in my .tclshrc.

What you probably want to use instead is the TCLLIBPATH
environment variable.

--
| Don Porter          Mathematical and Computational Sciences Division |
| donald.porter@nist.gov             Information Technology Laboratory |
| http://math.nist.gov/~DPorter/                                  NIST |
 |_______________________________________
_______________________________|