path: root/doc/ports/notes.convex

Begin V2.8 CONVEX/IRAF BETA port, 6-8 August 1989.
See also notes from October 1987 ALPHA port (appended).
-------------------------------------------------------

Summary:
	Installation of V2.8 was straightforward except for a nasty bug
	involving the host routine BCOPY.  I originally tried to use the
	C code versions of AMOVC etc. (installed in AS).  This caused the
	system environment list to become mangled, due to BCOPY modifying
	the data it was copying during a copy used to shift by one char
	to align the buffer in a REALLOC of the environment buffer.  The
	speculation is that the BCOPY uses vector instructions, and if the
	input and output arrays are aligned to within less than one vector
	register length data can be corrupted due to the whole vector
	segment being copied at once.

	Aside from that, things came up fine.  There were several compiler
	crashes with core dumps, but all but one of these were a result of
	problems with the IRAF code or system configuration.  In general
	the compiler seems to be in much better shape than during the
	alpha port.

	The final system is configured as follows: the HSI is generic (no
	floating point, can run on any Convex), and two architectures are
	supported, IEEE and NATIVE, corresponding to the two floating point
	architecture options available for the Convex.

	Detailed notes on the modifications made to port V2.8 BSD/IRAF follow.

unix/as.convex/
unix/as.convex/zsvjmp.s
unix/bin.convex/
	Added AS and BIN directories to the HSI for the Convex.  Installed
	the zsvjmp.s written for the alpha port.

unix/boot/bootlib/osputenv.c
	Commented out the call to putenv() - there is no comparable facility
	on the Convex.

unix/boot/spp/mkxc.sh
	Fixed a bug - the call to CC was not referencing $HSI_CF.

unix/boot/spp/rpp/rppfor/declco.f
	Replaced by a version that enables IMPLICIT NONE, which is how
	undeclared variable detection is handled by the Convex compiler.

unix/boot/spp/rpp/ratlibf/mkpkg.sh
unix/boot/spp/rpp/rppfor/mkpkg.sh
	Replaced the F77 by FC, the Convex fortran compiler.  There is no
	F77 on the Convex.

unix/boot/spp/xc.c
	1. Replaced all F77 references by FC.
	2. The link library list for the Convex is
		-lF77 -lI77 -lD77 -lm -lmathC1
	3. Modified the list of directories searched by sys() (for XPP and
	RPP) to include /local/bin, /usr/local/bin, and /iraf/local/bin.
	Merely another hack until the problem is fixed properly.
	4. Modified the list of directories searched by run() (for FC) to
	include /usr/convex, which is where FC resides on the Convex
	(another hack until the problem is properly resolved).

unix/boot/spp/xpp/xppcode.c
	This HSI file turned out to have code in it (for converting HMS to
	decimal floating) that used floating point.  Replaced by an
	equivalent routine which uses only integer calculations.

unix/hlib/iraf.h
	The bitwise intrinsics for the Convex are IAND, IOR, IEOR, and NOT.

unix/hlib/i1mach.f
unix/hlib/r1mach.f
unix/hlib/d1mach.f
	Replaced by the Sun versions.

unix/hlib/mkpkg.sf.CX
noao/lib/mkpkg.sf.CX
	Added special file lists for the Convex.  At present there is only
	one special file, images$geometry/geofit.x, which has to be compiled
	at O1 due to a fortran compiler bug.

unix/hlib/irafuser.csh
unix/hlib/libc/iraf.h
unix/hlib/libc/libc.h
unix/hlib/mkiraf.csh
unix/hlib/mkpkg.inc
unix/hlib/motd
	Routine changes for the Convex.  Added a #define CONVEX to <iraf.h>.
	MACH is set to `convex' in the irafuser.csh.  The HSI flags are

	    setenv	HSI_CF	"-O -fx"
	    setenv	HSI_FF	"-sa -fx -O0 -na -nv -nw"
	    setenv	HSI_XF	"-q -/sa -/fx -/O0 -/na -/nv -/nw -z"

	The MKPKG flags for the IEEE architecture are

	    $set	FLOAT	= "fi"
	    $set	XFLAGS	= "-c -q -/sa -/fi -/O2 -/na -/nw -/nv"
	    $set	XSFLAGS	= "-c -q -/sa -/fi -/O1 -/na -/nw -/nv"
	    $set	XVFLAGS	= "-c -q -/sa -/fi -/O2 -/na -/nw"
	    $set	LFLAGS	= "-z -/fi"

	and similarly for the NATIVE (Convex floating point) architecture.

unix/os/getproc.c
	This file, part of the tape drive allocation code, would not compile
	on the Convex (it reads the kernel process table which is fairly
	system dependent).  Commented out the offending code (a status value
	is returned indicating that the user does not have any processes)
	until the tape drive allocation problem can be resolved for the
	Convex.

unix/os/irafpath.c
	Modified to look for files in unix/bin.convex if the machine type
	is convex.

unix/os/zxwhen.c
	Added FPE hardware signal codes from <signal.h>.

mkpkg
noao/mkpkg
bin.ieee/
bin.native/
noao/bin.ieee/
noao/bin.native/
noao/lib/mkpkg.inc
unix/hlib/cl.csh
unix/hlib/mkpkg.inc
	Configured the system for two architectures, IEEE and NATIVE,
	corresponding to the two floating point options on the Convex.
	The HSI is compiled generic (no floating point dependencies),
	hence is runnable on either type of Convex.

dev/pix.imh
dev/pix.pix
dev/vdm.gki
	Installed versions for the Convex (IEEE architecture only!).

sys/gio/nspp/sysint/encd.f
	Fixed a bug in this file - this was fixed once before but evidently
	never got merged back into the master system.  The problem is the
	statement

	    if (len (char (ns + ichar ('0'))) .eq. 2) then

	which is evidently unnecessary and which makes an illegal or at
	least very questionable use of CHAR.

sys/gio/ncarutil/sysint/ishift.x
sys/gio/nspp/sysint/ishift.x
	Commented out the code for IAND and IOR, since these are intrinsic
	functions in Convex/Fortran.

unix/hlib/install
	Changed the machine type from `vax' to `convex'.

----------
Basic BETA port completed.  (8/8)

----------
August 8-10: on site at the VLA testing IRAF on the VLA system, which
includes two Convexes (plus some Suns and VAXes).

dev/devices
	Configured for the Convex.  (8/11)

unix/hlib/login.cl
	Added EDT and EMACS as foreign tasks to the default USER package.
	(8/11)

unix/as/zsvjmp.s
	An IMAGES task failed during testing while trying to create a type
	DOUBLE image, indicating that the MEM common was not double word
	aligned.  I was able to fix this by setting the symbol __mem_ (the
	mem common) to the absolute value 0, which not only double word
	aligns the common, it aligns it to any size, and simplifies 
	debugging by arranging for SPP pointers to directly index process
	virtual memory.  This technique (setting __mem_ to zero) did not
	work for the Convex back when the alpha port was attempted.  (8/12)

	[Postscript]  Setting mem to zero evidently was the cause of a
	number of mysterious program crashes that occurred once the system
	was relinked with the new zsvjmp.o with mem=0.  The problems went
	away when things were relinked with the mem=0 commented out,
	indicating that the mem=0 was the problem.  There was not time
	to check this out, but my guess is that since on the Convex program
	memory begins at 0x80000000, setting mem=0 causes very large pointer
	offsets which can overflow to negative integer values.  I changed
	zsvjmp.s to set mem=0x80000000 and the problems seem to have gone
	away, and we still get double word alignment.  (8/13)

unix/hlib/ic.csh +
unix/hlib/install
unix/hlib/login.cl
unix/boot/spp/xc.c
	Had problems getting IMFORT programs to link.
	1. The solution was to modify XC (FC) to link against the Convex
	library -lU77 when linking a host program.  This can only be done
	when XC is called with the -h flag as the library will result in
	a multiply defined loader error message if searched when linking
	an SPP program.
	2. The iraf foreign task FC now calls a new cshell script ic.csh,
	which calls XC after first determining the floating point option
	switch required to link IMFORT programs so that they are consistent
	with IRAFARCH.  For example, if Convex/IRAF is running the IEEE
	binaries, XC will be called with -/fi.
	3. Modified the install script to make a link for ic.csh.  The new
	task name stands for imfort-compile, and is not called FC because
	that is the Convex Fortran compiler.  Possibly FC should not be
	used as the command name in the USER package either, but I did
	not want to change that as it is shown as FC in all the user
	documentation.  (8/12)

unix/hlib/cl.csh
	Modified to define IRAFARCH if not already defined.  (8/12)

unix/os/alloc.c
	Modified to support the Convex tape allocation facilities.  Uses
	the Convex TPALLOC and TPDEALLOC utilities to perform the actual
	tape allocate/deallocate.  As a result, alloc.e no longer needs
	to have suid-root, although the install script will still install
	it that way.  Verified that local as well as remote network
	allocation works.  (8/12)

pkg/images/imarith/imcmode.gx
	IMCOMBINE would fail when presented with a section containing pixels
	that all had the same value.  The program would go into an infinite
	loop in the code at the end of imcmode.gx.  Modified to avoid a
	floating point equality test, and to add some limit checking in
	a couple of places to avoid infinite looping.  (8/13)

unix/hlib/mkfloat.csh
	1. While using "mkpkg [ieee|generic]" etc. on teh Convex, the message
	"usage: rm -[rif]" would sometimes appear.  This turned out to be due
	to calling rm with a null file list when restoring from generic.
	The fix was to to delete the file list file in the same command
	which deletes the listed files, ensuring that there is at least
	one file in the command.
	2. Also reorganized the code somewhat to use only one RMBIN rather
	than two, which speeds it up by a factor of two.  (8/14)

unix/os/zmaloc.c
	IMFORT programs would die on a memory allocator error: this was
	traced to the fact that the custom memory allocator used for
	BSD4.3/IRAF was still present in Convex/IRAF (which was built from
	the BSD version).  Commented out the memory debug code in zmaloc.c
	and all was well.  We will leave the applications relinked with the
	custom memory allocator in for now, since they have already been
	tested and did not show any problems.  (8/14)

----------
ALPHA port notes follow.

CONVEX/IRAF Port.  D.Tody, beginning 26 October 1987.
Using machine in Greenbelt, MD, as follows:
-----------------------------------------------------------------------------
	*********************************************************
                        WELCOME  TO  C1EAST
	*********************************************************
	SYSTEM MANAGERS:  BRIAN CHRISTIANSON & DALE LANCASTER

C1EAST  IS  A  CONVEX  C1-XP  MINI-SUPERCOMPUTER.

	-  128 MEGABYTES OF PHYSICAL MEMORY 
	-  1.5 GIGABYTES OF DISK SPACE
	-  40 MFLOPS PEAK PERFORMANCE

C1EAST IS CONFIGURED WITH:

	-  25.6 MEGABYTES OF DISK BUFFER CACHE
	-  64 USER SYSTEM
	-  ETHERNET
	-  IMAGEN LASER PRINTER

	-  4.2 BSD UNIX, CONVEX RELEASE 6.1.1
	-  VECTORIZING FORTRAN VERSION 3.0 
	-  VECTORIZING C VERSION Beta 2.0 (vc 1.0 is still around)
	-  ANSYS VERSION 4.2
-----------------------------------------------------------------------------

Snapshot of V2.6 IRAF restored to disk (/extra/iraf) by Convex.  (10/26)
Logged in via modem, took a look at Convex/UNIX, configured the IRAF login.

unix/as -> unix/as.vax
unix/as/zsvjmp.s
	Renamed the VAX assembler directory, and set up a new one for the
	Convex.  Wrote ZSVJMP/ZDOJMP for the Convex.  This took a while,
	and was one of the harder ones I have done, as the architecture and
	the C setjmp/longmp are complex.  The machine has a RISC architecture
	but nonetheless is fairly complex (and fast and expensive).  (11/2)

unix/os/zxwhen.c
	Modified the hardware specific exception codes table for the Convex.
	In the process of doing this, discovered that the old code assumed
	that hardware codes were distinct, while in fact they can be
	numbered similarly for different signals.  Modified the ZXGMES
	routine to work with hardware codes of the form SIGNAL+HWCODE rather
	than the old HWCODE.  (11/2)

unix/boot/spp/rpp/ratlibf/mkpkg.sh
unix/boot/spp/rpp/rppfor/mkpkg.sh
	Replaced "f77" by "fc".  (11/2)

unix/hlib/irafuser.csh
	Added an "-sa" flag for fc (the Convex Fortran compiler).  This flag
	prevents static compilation of argument lists and is necessary if C
	code is to be called from Fortran.  (11/2)

unix/hlib/libc/spp.h
unix/hlib/libc/libc.h
unix/hlib/libc/iraf.h
	Replaced the vax spp.h by the Sun version, which should be good
	enough for now, and may even be correct (Convex evidently supports
	IEEE floating as well as their native (Cray?) format).  Modified
	the Fortran COMMON external names in libc.h to add the extra
	leading underscore, used by the Convex Fortran compiler to make
	common external names distinct from other Forran externals.
	Edited the iraf.h file for the new $iraf (= /extra/iraf).  (11/2)

unix/hlib/motd
	Modified logo for the Convex.  (11/2)

-------------------------------------
Started up a bootstrap of the HSI.  This completed without incident, except
for a great many copies of the following warning messages from FC:

	Obsolete flag '-O' - flag '-no' assumed.
	fc: Warning on line X of Y.f: label defined but never referenced.

Modified HSI_FF (fc flags) in hlib$irafuser.csh to "-O1 -sa -nw" and repeated
the bootstrap starting in the SPP directory.  This worked, but now the
optimizer was enabled, and it helpfully produced a zillion of the following
advisory messages:

	fc: Advisory on line X of Y.f: more optimization is possible if this
	function call has no side effects.

Changed the flags to "-O1 -sa -nw -na" to fix this.  Tested the main HSI
tasks (rmbin, rtar, wtar, mkpkg, xpp, rpp) and they all passed basic tests!.
(11/2)

unix/hlib/i1mach.f
unix/hlib/d1mach.f
unix/hlib/r1mach.f
	Installed the versions for the Sun (IEEE floating etc.) for now.
	This will probably need to be tweaked later.  (11/3)

unix/hlib/iraf.h
	Modified the name mappings for the bitwise intrinsic functions (and,
	or, etc.).  For the Convex they are the same as in VMS Fortran.
	Set values of INDEFR and INDEFD, as below.  (11/3)

unix/boot/spp/xpp/xppcode.c
	Changed the Fortran mappings of the SPP "char" and "short" type
	coercion functions to "int2", which is implemented on the Convex.
	(11/3)

unix/boot/spp/xpp/decl.c
	Convex Fortran supports IMPLICIT NONE, so I modified the code which
	processes a procedure declaration to output this statement.  (11/3)

unix/hlib/mach.h
	Modified the values of various numeric constants.  The max exponent
	for real is 38, for double is 307.  The INDEF values were modified
	slightly.  The EPSILON values were very similar to those for the Sun.
	Byte swapping is no - most significant byte first.  (11/3)

unix/hlib/mkpkg.inc
	Set the default compiler flags as follows:

		XFLAGS	= "-cq -/O2 -/nw -/na -/nv"
		XSFLAGS	= "-cq -/O1 -/nw -/na -/sa"
		XVFLAGS	= "-cq -/O2"

	I have added a new global flag variable XSFLAGS, to be used for the
	VOS routines, i.e., for pure system code.  XFLAGS is for normal
	scientific applications code, which is pure SPP or SPP/Fortran code,
	and which would often benefit from vectorization.  System code may
	call C routines (e.g., the kernel routines), and rarely involves
	vector operations.  Distinguishing between the two broad classes
	of codes is necessary on the Convex in order to permit static
	allocation of procedure argument lists in Fortran (SPP) code.
	If Fortran code is to call C routines, all arguments must be pushed
	on the stack, hence this optimization option cannot be used in VOS
	code (flag -sa disables static allocation of argument lists).

	Optimization level O2 includes vectorization, O1 provides only local
	and global scalar optimization but no vectorization.  The -n flags
	turn off various compiler informative and warning messages, which one
	normally will not want to see (except perhaps once during development).
	These messages are enabled by default only for the VOPS routines.
	(11/3)

iraf$mkpkg
sys/*/mkpkg
	Added the line '$set XFLAGS = "$(XSFLAGS)"' to each VOS mkpkg file,
	to override the default xflags with the xsflags.  In the root mkpkg,
	added the $set to the "syslibs" program.  (11/3)

unix/boot/spp/xc.c
unix/boot/spp/mkxc.csh -> mkxc.sh
	Modified XC to use "fc" rather than "f77" as the compiler; omitted
	the -u flag, since this is done differently for Convex Fortran.
	To the "run" code, added /usr/convex to the search path, since that
	is where fc is located (a better solution would probably be to put
	the path in the #define).  (11/3)

local/bin/ +
local/bin/xc -> $hlib/xc.e (etc.)
	Only for the purposes of the port, set up a local/bin directory for
	iraf, and put it on PATH in the .login.  This will work only for iraf,
	but avoids having to make a request to the local system manager.
	(11/3)

------------------------------------
Started up the first full sysgen.  (11/3)

Summary of results of first full sysgen:
	The sysgen ran to completion, but not without problems.  The spool file
	was 19305 lines, 7205 lines when summarized (the extra stuff was
	mostly advisory information about vectorizing the VOPS routines).
	There were 23 serious runtime compiler errors of the form:

	    fc: >>>>>   C O M P I L E R   E R R O R    <<<<<
	    >>>>> See your system manager for help <<<<<
	    Error : Compiler error on line X of Y.c.

	These were distributed as follows:

	  #times		Error Message

	    16	Error : Compiler error on line 396 of misc.c.
	     6	Error : Compiler error on line 155 of allocSReg.c.
	     1	Error : Compiler error on line 584 of callintr.c.

	Note that these are errors in the Fortran compiler, not errors in
	the Fortran source.  The compiler routine which generated the error
	is given in the message.  These errors prevented compilation of the
	affected source file.

	Other errors in the sysgen were [1] fc cannot compile .c files,
	hence xc will have to be modified to call cc directly, and [2] in
	sys/gio/ncarutil/sysint/ishift.x, functions IAND and IOR are defined
	which appear to call themselves recursively, when the macros AND and
	OR are expanded.  These are dealt with further below.  (11/4)

local/bugs/
local/bugs/spool.full
local/bugs/spool.bugs
	Created a BUGS directory for the Convex and stored therein copies of
	all the Fortran sources which cause compiler time compiler failures,
	plus copies of the full spooled output from the first sysgen, and an
	edited digest of the same containing only the compiler error messages.
	Verified that the files cannot be compiled even at optimization level 0.
	All files compiled with optimization turned off EXCEPT one, the
	sysint/support.f file from gio/ncarutil.  (11/4)

sys/gio/ncarutil/sysint/support.f
	The subroutine ENCD in this file contained a statement which would
	cause the compiler to crash even with all optimization turned off.
	The culprit is as follows:

	    if (len (char (ns + ichar ('0'))) .eq. 2) then

	This is a pretty strange statement, and after staring at it for
	a while I decided that it would always be false (NS can take on
	values only between 4 and 6) and commented it out.  Of course it
	should not cause the complier to bomb, and I will report it to
	Convex, but I think the code is incorrect and should be fixed.  (11/4)

sys/gio/ncarutil/ishift.x
	This file contains source for the functions IAND and IOR, written in
	SPP and defined in terms of the SPP intrinsics AND and OR, which are
	implemented as macro defines in hlib$iraf.h.  On the Convex these are
	defined as the Fortran intrinsics IAND and IOR, but they are declared
	as external functions, hence the Fortran compiler quite correctly
	flags them as recursive references and fails to compiler the file.
	A simple fix is to replace the calls to AND and OR by calls to the
	OSB library functions ANDI and ORI; this is inefficient, but on the
	Convex the calls in the NCAR code map directly to the Fortran
	intrinsics anyhow, and if this were not the case the routines should
	be encoded in assembler and put on the special file list.  (11/4)

unix/hlib/mkpkg.sf
	Added the 22 or so files with runtime compiler failures to the special
	file list for CONVEX/IRAF.  Specifically:

	$set	noao	= "iraf$noao/"
	$set	XCP	= '& "$xc -cq -/no -/nw -/na &"'
	$set	XCS	= '& "$xc -cq -/no -/sa -/nw -/na &"'

	$special "sys$fio/":			fseti.x		$(XCS);
	$special "math$iminterp/":		msifit.x	$(XCP);
	$special "pkg$dataio/fits/":		fits_rheader.x	$(XCP)
						fits_wheader.x	$(XCP);
	$special "pkg$images/imarith/generic/":	imcmode.x	$(XCP);
	$special "pkg$images/filters/":		t_convolve.x	$(XCP);
	$special "pkg$plot/":			prows.x		$(XCP);
	$special "pkg$utilities/":		t_curfit.x	$(XCP);
	$special "$(noao)proto/":		t_bscale.x	$(XCP)
						t_imscale.x	$(XCP);
	$special "$(noao)onedspec/":		t_addsets.x	$(XCP)
						t_bswitch.x	$(XCP)
						t_dispcor.x	$(XCP)
						t_flatfit.x	$(XCP)
						t_sums.x	$(XCP)
						t_widstape.x	$(XCP);
	$special "$(noao)twodspec/apextract/":	excextract.x	$(XCP)
						excstrip.x	$(XCP)
						t_apnormalize.x	$(XCP);
	$special "$(noao)twodspec/longslit/":	ilsetbins.x	$(XCP);
	$special "$(noao)imred/ccdred/src/generic/":	imcmode.x $(XCP);
	$special "$(noao)imred/dtoi/":		hdtoi.x		$(XCP);
	(11/4)

unix/boot/spp/xc.c
	Modified to sort out .c source files and compile these separately
	with CC (the original XC used f77, which would accept anything). (11/4)

unix/as/zsvjmp.s
	This file contains the code which attempts to set the address assigned
	by the linker to the symbol __mem_ (the MEM common in Fortran) to 0.
	This is not yet working on the Convex; get multiply defined symbol
	errors.  I have commented this out for the moment in order to proceed.
	(11/4)

------------------------------------
Second attempt at a sysgen.  Special files all compiled ok, but got loader
errors as noted above, hence no executables.  After fixing zsvjmp.s I was
able to successfully link an executable.  Tried running it, and wonder of
wonders, it actually ran and produced a prompt!  The process did not quite
run correctly, but most of the iraf main stuff was evidently working if we
got that far, so this is encouraging.  (11/4)

unix/hlib/mkpkg.inc
unix/hlib/mkpkg.sf
	I just remembered that there are a number of VOPS routines coded in
	C in the OSB directory, which can be called by any applications code.
	Fortran code compiled with static argument lists enabled cannot be
	call C routines directly, so until the OSB routines can be recoded
	in Fortran for Convex, I have added the -sa switch for applications
	code as well as VOS code.  (11/4)

----------------------------
Third attempt at a sysgen.  Deleted all non-HSI binaries and started up a full
sysgen.  Should work this time with all the above bug fixes.  (11/4)

The sysgen completed normally, and this time suceeded in producing most of
the executables.  The cl runs and most basic things work ok!  There are a
number of runtime problems however, which need to be checked out.  Looking
over the spooled output I find four more files that caused the compiler to
crash, this time with a core dump, without even a compiler error message.
The message from FC (indicating abnormal termination of a subprocess) is

	fc: System error in /usr/convex/fskel

The files causing the problem were t_imarith.x in images, and in math,
gsaccum.x, gsrejectd.x, and isresolve.x.  Dale, my contact at Convex,
says that there is a major new version of the Convex Fortran compiler,
currently in beta test, and that I should try that.  I will proceed a bit
further with the current binaries before starting up another full sysgen,
as these have been running 8-9 hours.  (11/5)

unix/hlib/mkpkg.sf
	Added the above four files to the special file list, to be compiled
	with optimization level -O1 rather than -O2 (no vectorization). (11/5)

unix/hlib/mkpkg.sf
	After adding the above files to the special file list and resuming
	the compile of the gsurfit and surfit packages, more files requiring
	special treatment were uncovered.  The total is now 34.  (11/5)

-----------------------------
With the math libraries now built, I was able to finish building the IMAGES
package and tried out a few things - IMSTATR was about 3.5 cpusec, IMSHIFTR
around 6+ cpusec.  Interactive plotting is not yet working due to some
problem in the CL.  Error recovery in the CL is not yet working due to a
problem in ZDOJMP, which has not yet been debugged.  Until this is fixed,
any error will cause the CL to die.  (11/5)

unix/boot/spp/xc.c
	Modified to use version 4.0 of the Convex Fortran compiler.  (11/5)

------------------------------------
Sysgen 4.  Archived (local/oldfc.arc) and deleted all the old non-HSI binaries.
Ready to start a full sysgen with the new compiler.  Will do this in such a
way that the current executables remain intact for people to play with
tomorrow.  (11/5)

local/bugs.newfc +
local/bugs -> local/bugs.oldfc
	Set up separate bug directories for the old and new FC.  (11/5)

unix/hlib/sf +
unix/hlib/sf/main.x +
unix/hlib/mkpkg.sf
	The new sysgen has thus far compiled all the system libraries without
	any compile time errors, hence looks much better (sysgen still in
	progress; stay tuned).  Even with the new compiler, however, I am still
	getting an incorrect warning message "illegal transfer out of IFERR
	block" from the iraf main.  This was traced to the following code in
	the main:

		iferr (...)
		    ;
	or
		call xerpsh
		    ...
		if (.not.xerpop()) then goto NN
	    NN  continue

	Even with the optimizer turned completely off, FC is chucking out the
	call to XERPOP, causing the error message noted above.  Since this is
	not an optimizer problem, the only way to fix it was to hack on the
	source file.  The hacked version is in hlib$sf, and the file has been
	added to the special file list for the new-fc.  This is a particularly
	worrisome bug, as there may be cases such as this scattered all over
	the system.  (11/5)

-----------------------------
Sysgen with new FC looks pretty good.  There was one fskel coredump (vectorizer
evidently) which I will check out below.  (11/6)

noao/onedspec/sensfunc/mkpkg
noao/onedspec/sensfunc/sfgraphs.x -
	Deleted this zero length junk file and fixed up the mkpkg.  (11/6)

unix/hlib/mkpkg.sf
	Added an entry for file dataio$reblock/reblock_file.x, which causes
	fskel to coredump when compiled with level O2 optimization.  Entered
	in special file list for level O1 optimization.  (11/6)

unix/as/zsvjmp.s
	Finished debugging ZSVJMP/ZDOJMP (this was the cause of the CL crashing
	upon logout and during error recovery).  The Convex version of this
	routine was easily the most complex I have thus far encountered.
	The Convex architecture and instruction set is simple, no problem;
	the problem here as the complexity of the longjmp() code used to
	make ZDOJMP.  Instead of saving and restoring the machine context,
	the routine actually pops successive stack frames off the machine
	stack until it gets back to the stack frame of the ZSVJMP.  There
	are special cases, e.g., the stack frame pushed by the OS for an
	interrupt handler.  Twas a mess!   (11/12)

-------------------------------------------------
Resumed work on Convex port on 5 March - don't know how much time I have to
spend on this, but a little anyhow, and maybe the compiler is better.

	Cleaned up the some somewhat; moved some files to a save directory,
	    deleted a lot of junk test files scattered about the system.
	Redid the bootstrap without incident.
	Deleted all binaries and started a full sysgen.  As of now (5 March
	    5 pm) this is still in progress.  The CL and x_system.e are up
	    and look fine.

Here is the /etc/motd for the current Convex system:
-------------------
	*********************************************************
                        WELCOME  TO  C1EAST
	*********************************************************
	SYSTEM WINGNUTS:  BRIAN CHRISTIANSON & DALE LANCASTER

C1EAST  IS  A  CONVEX  C1-XP  MINI-SUPERCOMPUTER.
	-  128 MEGABYTES OF PHYSICAL MEMORY 
	-  1.5 GIGABYTES OF DISK SPACE
	-  40 MFLOPS PEAK PERFORMANCE

C1EAST IS CONFIGURED WITH:
	-  12.8 MEGABYTES OF DISK BUFFER CACHE
	-  64 USER SYSTEM
	-  ETHERNET
	-  IMAGEN LASER PRINTER
	-  4.2 BSD UNIX, CONVEX RELEASE 6.1
	-  VECTORIZING FORTRAN VERSION 4.0 with In-Lining
	-  VECTORIZING C VERSION Beta 2.0 (vc 1.0 is still around)
	-  ANSYS VERSION 4.2

	CONVEX COVUEshell V7.0 installed. Look in /usr/doc for
	new release notices.


----------------------------------------------
Resume testing yet again, this time with a new version of the Fortran
compiler.

unix/boot/spp/xc.c
unix/hlib/mkpkg.inc
	1. Added a new flag "-N" to XC.  Setting this flag causes XC to try to
	use the beta test Fortran compiler, which is called as

		/usr/convex/newfc/fc -B/usr/convex/newfc ...  

	2. Added the -N flag to the flag macros in mkpkg.inc. (4/16)

unix/as/zsvjmp.s
unix/os/zdojmp.c +
unix/os/mkpkg
	Replaced the nativ ZSVJMP/ZDOJMP I originally wrote for the Convex
	with a much simpler version which "piggybacks" on the C setjmp/longjmp.
	The old file is zsvjmp.CONVEX.  (4/16)

----------------------
Deleted the main system binaries and started a new sysgen.  Will use the old
HSI for now.  (4/16)

	The sysgen ran to completion with minor problems.  One was the
	appearance of the following warning message for every file, regardless
	of the fact that none of our code uses any Convex Fortran preprocessor
	facilities:

	    fpp: WARNING: Use of fpp is being phased out; please update
	    your program by removing uses of #define, #if, #ifdef

	The second problem, more serious, what that a number of modules failed
	to compile due to the IMPLICIT NONE statement being out of order; in
	pointer functions, the Mem declarations were being output before the
	IMPLICIT NONE (see below).  (4/17)

unix/boot/spp/xpp/decl.c
unix/boot/spp/rpp/rpprat/defs
unix/boot/spp/rpp/rpprat/declco.r
unix/boot/spp/rpp/rppfor/declco.f
	1. In decl.c, deleted the code previously added to generate the
	implicit none statement.  This is not the right place for it, as it
	doesn't work for pointer functions.
	2. In declco.r, added code to output theIMPLICIT NONE immediately
	after a function or subroutine statement.
	3. In defs, added a switch IMPNONE, which if defined, causes the
	IMPLICIT NONE statements to be output.
	4. Processed the fortran for declco.r and put it in rppfor/declco.f.
	The defs and declco.r files were not updated on the Convex; I made
	the changes on lyra since this is a generally useful mod, and only
	copied the processed Fortran to the Convex.  (4/17)

	... incremental sysgen now in progress...

[Ran all benchmarks except [24]USER, networking, and IMLOADs.  No errors.]
[4/18 SRo]
[Ran all test procedures except magtape i/o; no errors.  4/27 SRo]

hlib/mkpkg.sf
	Added the following files to the special file list, to be compiled
	with the old fc compiler, to avoid a fatal bug in the new 4.1 fc.

	sys/imfort/clargs.x
	sys/imfort/imemsg.x
	sys/imfort/imokwl.x
	sys/imfort/impixf.x
	sys/imfort/imtypk.x
	sys/gio/ncarutil/conlib/congen.f
	sys/gio/ncarutil/conran.f
	sys/gio/ncarutil/conrec.f
	sys/gio/ncarutil/isosrf.f
	sys/gio/ncarutil/threed.f
	sys/gio/ncarutil/velvct.f
	noao/onedspec/t_standard.x

	(5/13 SRo)

[Relink sysgen to replace the missing executables in bin$ prior to having ]
[a tape cut for mailing to NOAO. (5/13 SRo)				  ]