env variable not being set?

[drdad5727]

Ok I made a teeny tiny little change ) to the C-executable I use to launch my Tcl/Tk application and it stopped working. The problem seems to be that changes I make to the environment before I call Tk_Main/Tk_Init via code like this:

[tt]sprintf(tk, "TK_LIBRARY=%s\\tk", loaddir);
_putenv(tk);
free(tk);[/tt]

which has been working for over ten years, doesn't work, in the sense that the Tcl [tt]env[/tt] variable does not have a TK_LIBRARY entry. However, there is definitely a TK_LIBRARY entry in the environment, as I can tell by various means.

About all I did (-: was move the code that does those environment settings from a dll directly into the executable. If I did something else, I don't know what it is.

Any ideas why the [tt]env[/tt] variable isn't being populated?

 

[Bong]

It may have to do with the separation, that I think happened within the last 10 years, between "User" environment variables and "System" environment variables. I suspect you're changing the user-type env vars and you need to change the system type. You can check this out by going to the control panel, then system/advanced/environment variables. That said, I don't know how to make that happen in C.

_________________
Bob Rashkin

 

[drdad5727]

I thought I'd answer my own question.

I never did find out why it wasn't working, so I developed a workaround. I put all the values I wanted in the environment into the Tcl [tt]env[/tt] array by hand using code like this, before calling Tk_Init

for (i = 0; i < arrCt; i++) {
      char * value = getenv(setThese[i]);
     Tcl_SetVar2(interp, "env", setThese[i], value, TCL_GLOBAL_ONLY);
  }

I don't know why it didn't work, but it works now !