TkTests

Problem:
test scrollbar-3.42 fails under windows.
Questions
How to figure out in tcl if a definition was made during the compilation?
Add another constraint?

Explenation
This frame.test is only analyzing the platform

if {$tcl_platform(platform) == "windows"} {
test frame-2.5 {toplevel configuration options} {
catch {destroy .t}
toplevel .t -width 200 -height 100
wm geometry .t +0+0
list [catch {.t configure -use 0x44022} msg] $msg [.t configure -use]
} {1 {window "0x44022" doesn't exist} {-use use Use {} {}}}
} else {
test frame-2.5 {toplevel configuration options} {
catch {destroy .t}
toplevel .t -width 200 -height 100
wm geometry .t +0+0
list [catch {.t configure -use 0x44022} msg] $msg [.t configure -use]
} {1 {can't modify -use option after widget is created} {-use use Use {} {}}}
}

while in tkFrame.c there is only definition checked

/*
* Don't allow the options -class, -colormap, -container, -screen,
* -use, or -visual to be changed.
*/
// line 775
#ifdef SUPPORT_CONFIG_EMBEDDED
if (c == 'u') { //this checks if -use is changed
const char *string = Tcl_GetString(objv[i+1]);
if (TkpUseWindow(interp, framePtr->tkwin,
string) != TCL_OK) {
result = TCL_ERROR;
goto done;
}
} else {
Tcl_AppendResult(interp, "can't modify ", arg,
" option after widget is created", NULL);
result = TCL_ERROR;
goto done;
}
#else
Tcl_AppendResult(interp, "can't modify ", arg,
" option after widget is created", NULL);
result = TCL_ERROR;
goto done;
#endif

When compiling Tcl under Windows by Msys + Mingw, there's created Makefile that doesn't contain SUPPORT_CONFIG_EMBEDDED definition (in contrary to Makefile.vc and Makefile.bc).

I didn't manage to find how to figure out if a definition was made during the compilation.
Moreover, as those compilations differ, should detecting the way of windows compilation be add as another constraint?