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183 lines
7 KiB
Text
183 lines
7 KiB
Text
This is the VMS port of GNU Make done by Hartmut.Becker@compaq.com.
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It is based on the specific version 3.77k and on 3.78.1. 3.77k was done
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by Klaus Kämpf <kkaempf@rmi.de>, the code was based on the VMS port of
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GNU Make 3.60 by Mike Moretti.
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It was ported on OpenVMS/Alpha V7.1, DECC V5.7-006. It was re-build and
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tested on OpenVMS/Alpha V7.2, OpenVMS/VAX 7.1 and 5.5-2. Different
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versions of DECC were used. VAXC was tried: it fails; but it doesn't
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seem worth to get it working. There are still some PTRMISMATCH warnings
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during the compile. Although perl is working on VMS the test scripts
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don't work. The function $shell is still missing.
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There is a known bug in some of the VMS CRTLs. It is in the shipped
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versions of VMS V7.2 and V7.2-1 and in the currently (October 1999)
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available ECOs for VMS V7.1 and newer versions. It is fixed in versions
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shipped with newer VMS versions and all ECO kits after October 1999. It
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only shows up during the daylight saving time period (DST): stat()
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returns a modification time 1 hour ahead. This results in GNU make
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warning messages. For a just created source you will see:
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$ gmake x.exe
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gmake.exe;1: *** Warning: File `x.c' has modification time in the future (940582863 > 940579269)
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cc /obj=x.obj x.c
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link x.obj /exe=x.exe
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gmake.exe;1: *** Warning: Clock skew detected. Your build may be incomplete.
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New in 3.78.1:
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Fix a problem with automatically remaking makefiles. GNU make uses an
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execve to restart itself after a successful remake of the makefile. On
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UNIX systems execve replaces the running program with a new one and
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resets all signal handling to the default. On VMS execve creates a child
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process, signal and exit handlers of the parent are still active, and,
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unfortunately, corrupt the exit code from the child. Fix in job.c:
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ignore SIGCHLD.
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Added some switches to reflect latest features of DECC. Modifications in
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makefile.vms.
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Set some definitions to reflect latest features of DECC. Modifications in
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config.h-vms (which is copied to config.h).
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Added extern strcmpi declaration to avoid 'implicitly declared' messages.
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Modification in make.h.
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Default rule for C++, conditionals for gcc (GCC_IS_NATIVE) or DEC/Digital/
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Compaq c/c++ compilers. Modifications in default.c.
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Usage of opendir() and friends, suppress file version. Modifications in dir.c.
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Added VMS specific code to handle ctrl+c and ctrl+y to abort make.
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Modifications in job.c.
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Added support to have case sensitive targets and dependencies but to
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still use case blind file names. This is especially useful for Java
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makefiles on VMS:
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.SUFFIXES :
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.SUFFIXES : .class .java
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.java.class :
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javac "$<
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HelloWorld.class : HelloWorld.java
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A new macro WANT_CASE_SENSITIVE_TARGETS in config.h-vms was introduced.
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It needs to be enabled to get this feature; default is disabled. The
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macro HAVE_CASE_INSENSITIVE_FS must not be touched: it is still enabled.
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Modifications in file.c and config.h-vms.
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Bootstrap make to start building make is still makefile.com, but make
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needs to be re-made with a make to make a correct version: ignore all
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possible warnings, delete all objects, rename make.exe to a different
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name and run it.
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Made some minor modifications to the bootstrap build makefile.com.
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This is the VMS port of GNU Make.
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It is based on the VMS port of GNU Make 3.60 by Mike Moretti.
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This port was done by Klaus Kämpf <kkaempf@rmi.de>
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There is first-level support available from proGIS Software, Germany.
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Visit their web-site at http://www.progis.de to get information
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about other vms software and forthcoming updates to gnu make.
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New for 3.77:
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/bin/sh style I/O redirection is supported. You can now write lines like
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mcr sys$disk:[]program.exe < input.txt > output.txt &> error.txt
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Makefile variables are looked up in the current environment. You can set
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symbols or logicals in DCL and evaluate them in the Makefile via
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$(<name-of-symbol-or-logical>). Variables defined in the Makefile
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override VMS symbols/logicals !
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Functions for file names are working now. See the GNU Make manual for
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$(dir ...) and $(wildcard ...). Unix-style and VMS-style names are
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supported as arguments.
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The default rules are set up for GNU C. Building an executable from a
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single source file is as easy as 'make file.exe'.
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The variable $(ARCH) is predefined as ALPHA or VAX resp. Makefiles for
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different VMS systems can now be written by checking $(ARCH) as in
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ifeq ($(ARCH),ALPHA)
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$(ECHO) "On the Alpha"
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else
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$(ECHO) "On the VAX"
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endif
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Command lines of excessive length are correctly broken and written to a
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batch file in sys$scratch for later execution. There's no limit to the
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lengths of commands (and no need for .opt files :-) any more.
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Empty commands are handled correctly and don't end in a new DCL process.
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New for 3.76:
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John W. Eaton has updated the VMS port to support libraries and VPATH.
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To build Make, simply type @makefile. This should compile all the
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necessary files and link Make. There is also a file called
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makefile.vms. If you already have GNU Make built you can just use
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Make with this makefile to rebuild.
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Here are some notes about GNU Make for VMS:
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The cd command is supported if it's called as $(CD). This invokes
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the 'builtin_cd' command which changes the directory.
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Calling 'set def' doesn't do the trick, since a sub-shell is
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spawned for this command, the directory is changed *in this sub-shell*
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and the sub-shell ends.
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Libraries are not supported. They were in GNU Make 3.60 but somehow I
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didn't care porting the code. If there is enough interest, I'll do it at
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some later time.
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The variable $^ separates files with commas instead of spaces (It's the
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natural thing to do for VMS).
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See defaults.c for VMS default suffixes and my definitions for default
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rules and variables.
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The shell function is not implemented yet.
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Load average routines haven't been implemented for VMS yet.
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The default include directory for including other makefiles is
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SYS$SYSROOT:[SYSLIB] (I don't remember why I didn't just use
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SYS$LIBRARY: instead; maybe it wouldn't work that way).
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The default makefiles make looks for are: makefile.vms, gnumakefile,
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makefile., and gnumakefile. .
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The stat() function and handling of time stamps in VMS is broken, so I
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replaced it with a hack in vmsfunctions.c. I will provide a full rewrite
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somewhere in the future. Be warned, the time resolution inside make is
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less than what vms provides. This might be a problem on the faster Alphas.
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You can use a : in a filename only if you preceed it with a backslash ('\').
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E.g.- hobbes\:[bogas.files]
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Make ignores success, informational, or warning errors (-S-, -I-, or
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-W-). But it will stop on -E- and -F- errors. (unless you do something
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to override this in your makefile, or whatever).
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Remote stuff isn't implemented yet.
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Multiple line DCL commands, such as "if" statements, must be put inside
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command files. You can run a command file by using \@.
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VMS changes made for 3.74.3
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Lots of default settings are adapted for VMS. See default.c.
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Long command lines are now converted to command files.
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Comma (',') as a separator is now allowed. See makefile.vms for an example.
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