🚀 go-pugleaf

Dear Richard (or whoever)

Herewith description of a few tiny bugs in unexec.c which I tripped over
while installing Gnu on a TPIX (Tadpole System V.3.1) system.

unexec.c appears to assume that its input has 3 sections.  Our object
files have four sections (including .comment); this doesn't get set to
3 when the file is written.  A patch to do this is as follows:

	535a536,538
	> #ifdef TPIX
	>   f_hdr.f_nscns=3;			/* Fix up number of sections */
	> #endif

Also, our object file has a magic number of 0x413, which means TPIX
expects special alignment of the .text section for performance.  This
can be fixed up either by a facility to reset the magic number to
something else - 0x410 would do the trick for TPIX - or a facility to
force the .text section to load in a particular place, which is what I
chose to do:

	556a560,562
	> #ifdef TPIX
	>   f_thdr.s_scnptr = 0xd0;		/* Force offset to be 0xd0 */
	> #endif

There was also a problem with terminfo.c redeclaring PC incorrectly.
I got round it with the patch below, though I suspect this isn't the
right thing to do:

	24a25,27
	> #if 1
	> char *UP, *BC;			/* avoid name clash */
	> #else
	25a29,30
	> #endif
	>

Hope this is of interest & thanks for the good work!

Tim