Thank you very much, kind Monk{hv}. I have progressed, if after long delay on my part (my apologies; I was a bit daunted). The problem was in trying to compile in JPEG/jpeg/configure, lines 625-26, which was as follows: 

    625 #include "confdefs.h"
    626 main(){return(0);}

[download]

Running that snippet with same invocation as in the error message, the crux was that it wanted s/main/int main/

I changed the snippet to 'int main', backed up to the main Tk directory, ran perl Makefile.PL there, and progressed to another error, in compiling Xlib_f.c, as follows: 

Xlib.t:334:14: error: initialization of ‘KeySym (*)(Display *, unsigne
+d int,  int)’ {aka ‘long unsigned int (*)(Display *, unsigned int,  i
+nt)’} from incompatible pointer type ‘KeySym (*)(Display *, KeyCode, 
+ int)’ {aka ‘long unsigned int (*)(Display *, unsigned char,  int)’} 
+[-Wincompatible-pointer-types]

[download]

If your Monkness could vouchsafe another bit of wisdom about this, I would be most thankful.

In reply to Re^2: Tk install failing by ckmate-king-2
in thread Tk install failing by ckmate-king-2

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