4
There's a DCL command procedure that will issue all the necessary
5
CC and LINK commands, and there's also a Makefile for use with the MMS
6
utility. From the source directory, use either
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|$ MMS/DECRIPTION=[.VMS]DECSRIP.MMS GAWK
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VAX C V3.x -- use either vmsbuild.com or descrip.mms as is. These use
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CC/OPTIMIZE=NOLINE, which is essential for version 3.0.
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VAX C V2.x -- (version 2.3 or 2.4; older ones won't work); edit either
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vmsbuild.com or descrip.mms according to the comments in them.
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For vmsbuild.com, this just entails removing two '!' delimiters.
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Also edit config.h (which is a copy of file [.config]vms-conf.h)
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and comment out or delete the two lines ``#define __STDC__ 0''
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and ``#define VAXC_BUILTINS'' near the end.
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GNU C -- edit vmsbuild.com or descrip.mms; the changes are different
20
from those for VAX C V2.x, but equally straightforward. No
21
changes to config.h should be needed.
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Tested under VMS V5.3 and V5.4-2 using VAX C V3.2, V3.1, and V2.3
24
and also GNU C V1.39. Should work without modifications for VMS V4.6
28
Installing GAWK on VMS:
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All that's needed is a 'foreign' command, which is a DCL symbol
31
whose value begins with a dollar sign.
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|$ GAWK :== $device:[directory]GAWK
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(Substitute the actual location of gawk.exe for 'device:[directory]'.)
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That symbol should be placed in the user's login.com or in the system-
35
wide sylogin.com procedure so that it will be defined every time the
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Optionally, the help entry can be loaded into a VMS help library.
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|$ LIBRARY/HELP SYS$HELP:HELPLIB [.VMS]GAWK.HLP
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(You may want to substitute a site-specific help library rather than
41
the standard VMS library 'HELPLIB'.) After loading the help text,
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will provide information about both the gawk implementation and the
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awk programming language.
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The logical name AWK_LIBRARY can designate a default location
47
for awk program files. For the '-f' option, if the specified filename
48
has no device or directory path information in it, Gawk will look in
49
the current directory first, then in the directory specified by the
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translation of AWK_LIBRARY if it the file wasn't found. If the file
51
still isn't found, then ".awk" will be appended and the file access
52
will be re-tried. If AWK_LIBRARY is not defined, that portion of the
53
file search will fail benignly.
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Command line parsing and quoting conventions are significantly
59
different on VMS, so examples in _The_GAWK_Manual_ or the awk book
60
often need minor changes. They *are* minor though, and all the awk
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programs should run correctly.
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Here are a couple of trivial tests:
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|$ gawk -- "BEGIN {print ""Hello, World!""}"
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|$ gawk -"W" version !could also be -"W version" or "-W version"
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Note that upper- and mixed-case text must be quoted.
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The VMS port of Gawk includes a DCL-style interface in addition
69
to the original shell-style interface. See the help entry for details.
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One side-effect of dual command line parsing is that if there's only a
71
single parameter (as in the quoted string program above), the command
72
becomes ambiguous. To work-around this, the normally optional "--"
73
flag is required to force shell rather than DCL parsing. If any other
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dash-type options (or multiple parameters such as data files to be
75
processed) are present, there is no ambiguity and "--" can be omitted.
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The logical name AWKPATH can be used to override the default
78
search path of "SYS$DISK:[],AWK_LIBRARY:" when looking for awk program
79
files specified by the '-f' option. The format of AWKPATH is a comma-
80
separated list of directory specifications. When defining it, the
81
value should be quoted so that it retains a single translation, not a
82
multi-translation RMS searchlist.
added
removed
README.VMS
