From 1a991ada47e0c98ddcb4b2d30b1cf14e4b6a949a Mon Sep 17 00:00:00 2001 From: Paul Smith Date: Sun, 22 Sep 2013 00:48:05 -0400 Subject: Add VMS port updates from Hartmut Becker. --- README.VMS | 284 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 284 insertions(+) create mode 100644 README.VMS (limited to 'README.VMS') diff --git a/README.VMS b/README.VMS new file mode 100644 index 0000000..f7b064d --- /dev/null +++ b/README.VMS @@ -0,0 +1,284 @@ +This version of GNU make has been tested on +OpenVMS V8.3 (Alpha) and V8.4 (Integrity). + +Build instructions +------------------ +Make a 1st version + $ @makefile.com ! ignore any compiler and/or linker warning + $ copy make.exe 1st-make.exe + Use the 1st version to generate a 2nd version + $ mc sys$disk:[]1st-make clean ! ignore any file not found messages + $ mc sys$disk:[]1st-make + Verify your 2nd version + $ copy make.exe 2nd-make.exe + $ mc sys$disk:[]2nd-make clean + $ mc sys$disk:[]2nd-make + Don't use the HP C V7.2-001 compiler, which has an incompatible change + how __STDC__ is defined. This results at least in compile time warnings. + +Changes since GNU make 3.82 +--------------------------- + +Fix build problems. + +The new feature "Loadable objects" is not yet supported. If you need it, +please send a change request or submit a bug report. + +The new option --output-sync (-O) is accepted but has no effect: GNU make +for VMS does not support running multiple commands simultaneously. + +Changes for GNU make 3.82 + +Michael Gehre (at VISTEC-SEMI dot COM) supplied a fix for a problem with +timestamps of object modules in OLBs. The timestamps were not correctly +adjusted to GMT based time, if the local VMS time was using a daylight saving +algorithm and if daylight saving was switched off. + +John Eisenbraun (at HP dot COM) supplied fixes and and an enhancement to append +output redirection in action lines. + +Rework of ctrl+c and ctrl+y handling. + +Fix a problem with cached strings, which showed on case-insensitive file +systems. + +Build fixes for const-ified code in VMS specific sources. + +A note on appending the redirected output. With this change, a simple mechanism +is implemented to make ">>" work in action lines. In VMS there is no simple +feature like ">>" to have DCL command or program output redirected and appended +to a file. GNU make for VMS already implements the redirection of output. If +such a redirection is detected, an ">" on the action line, GNU make creates a +DCL command procedure to execute the action and to redirect its output. Based +on that, now ">>" is also recognized and a similar but different command +procedure is created to implement the append. The main idea here is to create a +temporary file which collects the output and which is appended to the wanted +output file. Then the temporary file is deleted. This is all done in the +command procedure to keep changes in make small and simple. This obviously has +some limitations but it seems good enough compared with the current ">" +implementation. (And in my opinion, redirection is not really what GNU make has +to do.) With this approach, it may happen that the temporary file is not yet +appended and is left in SYS$SCRATCH. The temporary file names look like +"CMDxxxxx.". Any time the created command procedure can not complete, this +happens. Pressing Ctrl+Y to abort make is one case. In case of Ctrl+Y the +associated command procedure is left in SYS$SCRATCH as well. Its name is +CMDxxxxx.COM. + +Change in the Ctrl+Y handling. The CtrlY handler now uses $delprc to delete all +children. This way also actions with DCL commands will be stopped. As before +the CtrlY handler then sends SIGQUIT to itself, which is handled in common +code. + +Change in deleteing temporary command files. Temporary command files are now +deleted in the vms child termination handler. That deletes them even if +a Ctrl+C was pressed. + +The behavior of pressing Ctrl+C is not changed. It still has only an effect, +after the current action is terminated. If that doesn't happen or takes too +long, Ctrl+Y should be used instead. + +Changes for GNU make 3.80 + +. In default.c define variable ARCH as IA64 for VMS on Itanium systems. + +. In makefile.vms avoid name collision for glob and globfree. + +This is the VMS port of GNU Make done by Hartmut.Becker@compaq.com. + +It is based on the specific version 3.77k and on 3.78.1. 3.77k was done +by Klaus Kämpf , the code was based on the VMS port of +GNU Make 3.60 by Mike Moretti. + +It was ported on OpenVMS/Alpha V7.1, DECC V5.7-006. It was re-build and +tested on OpenVMS/Alpha V7.2, OpenVMS/VAX 7.1 and 5.5-2. Different +versions of DECC were used. VAXC was tried: it fails; but it doesn't +seem worth to get it working. There are still some PTRMISMATCH warnings +during the compile. Although perl is working on VMS the test scripts +don't work. The function $shell is still missing. + +There is a known bug in some of the VMS CRTLs. It is in the shipped +versions of VMS V7.2 and V7.2-1 and in the currently (October 1999) +available ECOs for VMS V7.1 and newer versions. It is fixed in versions +shipped with newer VMS versions and all ECO kits after October 1999. It +only shows up during the daylight saving time period (DST): stat() +returns a modification time 1 hour ahead. This results in GNU make +warning messages. For a just created source you will see: + + $ gmake x.exe + gmake.exe;1: *** Warning: File 'x.c' has modification time in the future (940582863 > 940579269) + cc /obj=x.obj x.c + link x.obj /exe=x.exe + gmake.exe;1: *** Warning: Clock skew detected. Your build may be incomplete. + + +New in 3.78.1: + +Fix a problem with automatically remaking makefiles. GNU make uses an +execve to restart itself after a successful remake of the makefile. On +UNIX systems execve replaces the running program with a new one and +resets all signal handling to the default. On VMS execve creates a child +process, signal and exit handlers of the parent are still active, and, +unfortunately, corrupt the exit code from the child. Fix in job.c: +ignore SIGCHLD. + +Added some switches to reflect latest features of DECC. Modifications in +makefile.vms. + +Set some definitions to reflect latest features of DECC. Modifications in +config.h-vms (which is copied to config.h). + +Added extern strcmpi declaration to avoid 'implicitly declared' messages. +Modification in make.h. + +Default rule for C++, conditionals for gcc (GCC_IS_NATIVE) or DEC/Digital/ +Compaq c/c++ compilers. Modifications in default.c. + +Usage of opendir() and friends, suppress file version. Modifications in dir.c. + +Added VMS specific code to handle ctrl+c and ctrl+y to abort make. +Modifications in job.c. + +Added support to have case sensitive targets and dependencies but to +still use case blind file names. This is especially useful for Java +makefiles on VMS: + + .SUFFIXES : + .SUFFIXES : .class .java + .java.class : + javac "$< + HelloWorld.class : HelloWorld.java + +A new macro WANT_CASE_SENSITIVE_TARGETS in config.h-vms was introduced. +It needs to be enabled to get this feature; default is disabled. The +macro HAVE_CASE_INSENSITIVE_FS must not be touched: it is still enabled. +Modifications in file.c and config.h-vms. + +Bootstrap make to start building make is still makefile.com, but make +needs to be re-made with a make to make a correct version: ignore all +possible warnings, delete all objects, rename make.exe to a different +name and run it. + +Made some minor modifications to the bootstrap build makefile.com. + +This is the VMS port of GNU Make. + +It is based on the VMS port of GNU Make 3.60 by Mike Moretti. + +This port was done by Klaus Kämpf + +There is first-level support available from proGIS Software, Germany. +Visit their web-site at http://www.progis.de to get information +about other vms software and forthcoming updates to gnu make. + +New for 3.77: + +/bin/sh style I/O redirection is supported. You can now write lines like + mcr sys$disk:[]program.exe < input.txt > output.txt &> error.txt + +Makefile variables are looked up in the current environment. You can set +symbols or logicals in DCL and evaluate them in the Makefile via +$(). Variables defined in the Makefile +override VMS symbols/logicals ! + +Functions for file names are working now. See the GNU Make manual for +$(dir ...) and $(wildcard ...). Unix-style and VMS-style names are +supported as arguments. + +The default rules are set up for GNU C. Building an executable from a +single source file is as easy as 'make file.exe'. + +The variable $(ARCH) is predefined as ALPHA or VAX resp. Makefiles for +different VMS systems can now be written by checking $(ARCH) as in + ifeq ($(ARCH),ALPHA) + $(ECHO) "On the Alpha" + else + $(ECHO) "On the VAX" + endif + +Command lines of excessive length are correctly broken and written to a +batch file in sys$scratch for later execution. There's no limit to the +lengths of commands (and no need for .opt files :-) any more. + +Empty commands are handled correctly and don't end in a new DCL process. + + +New for 3.76: + +John W. Eaton has updated the VMS port to support libraries and VPATH. + + +To build Make, simply type @makefile. This should compile all the +necessary files and link Make. There is also a file called +makefile.vms. If you already have GNU Make built you can just use +Make with this makefile to rebuild. + +Here are some notes about GNU Make for VMS: + +The cd command is supported if it's called as $(CD). This invokes +the 'builtin_cd' command which changes the directory. +Calling 'set def' doesn't do the trick, since a sub-shell is +spawned for this command, the directory is changed *in this sub-shell* +and the sub-shell ends. + +Libraries are not supported. They were in GNU Make 3.60 but somehow I +didn't care porting the code. If there is enough interest, I'll do it at +some later time. + +The variable $^ separates files with commas instead of spaces (It's the +natural thing to do for VMS). + +See defaults.c for VMS default suffixes and my definitions for default +rules and variables. + +The shell function is not implemented yet. + +Load average routines haven't been implemented for VMS yet. + +The default include directory for including other makefiles is +SYS$SYSROOT:[SYSLIB] (I don't remember why I didn't just use +SYS$LIBRARY: instead; maybe it wouldn't work that way). + +The default makefiles make looks for are: makefile.vms, gnumakefile, +makefile., and gnumakefile. . + +The stat() function and handling of time stamps in VMS is broken, so I +replaced it with a hack in vmsfunctions.c. I will provide a full rewrite +somewhere in the future. Be warned, the time resolution inside make is +less than what vms provides. This might be a problem on the faster Alphas. + +You can use a : in a filename only if you precede it with a backslash ('\'). +E.g.- hobbes\:[bogas.files] + +Make ignores success, informational, or warning errors (-S-, -I-, or +-W-). But it will stop on -E- and -F- errors. (unless you do something +to override this in your makefile, or whatever). + +Remote stuff isn't implemented yet. + +Multiple line DCL commands, such as "if" statements, must be put inside +command files. You can run a command file by using \@. + + +VMS changes made for 3.74.3 + +Lots of default settings are adapted for VMS. See default.c. + +Long command lines are now converted to command files. + +Comma (',') as a separator is now allowed. See makefile.vms for an example. + +------------------------------------------------------------------------------- +Copyright (C) 1996-2013 Free Software Foundation, Inc. +This file is part of GNU Make. + +GNU Make is free software; you can redistribute it and/or modify it under the +terms of the GNU General Public License as published by the Free Software +Foundation; either version 3 of the License, or (at your option) any later +version. + +GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR +A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program. If not, see . -- cgit v1.2.3