Using STARTUP_FROM_RESET and project still won't start? Try this...

I was working on a project using a Stellaris LM4F part, and when I went to provide my client the standalone device, I discovered that the hardware wouldn't reset without the IDE and JTAG attached.  I had already defined STARTUP_FROM_RESET, but it wasn't working.  I tried defining it in different locations (Solution common, Project THUMB debug, LM32_Startup.s file) but nothing worked.  I had Google searched, and searched this site, but no luck.

Trying again, I searched Google some more, and found a page on this site about the problem, but it was specific to the LPC2000.  I decided to look anyway, just in case. 

I found the answer.

Buried in the middle of this page is the following critical text:

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The application is trying to communicate with the host. If your program has calls to debug I/O functions (debug_printf, etc) then this can make standalone applications block as these functions expect to communicate over the debug interface with a host application.
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I did a search for "debug_printf" in my code, and quickly commented them all out.  Compiled and downloaded the program, and when I powered it up unattached, it booted perfectly.

If you're curious, here's the link to the full page:

https://rowley.zendesk.com/entries/61610-Application-not-starting-up-from-reset-LPC2000-