84 lines
3.8 KiB
Plaintext
84 lines
3.8 KiB
Plaintext
Brief instructions for building flex 2.5.x for VMS:
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0) if you have either MMS (from Digital) or MMK (freeware) for use
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as a `make' utility, follow the directions in steps #1 through #5 below.
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If not, execute
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@BUILD.COM xxxC
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where "xxxC" is either "VAXC" or "DECC" or "GNUC", and then skip to
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step #5.
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1) set default to the source directory (not the [.MISC.VMS] subdirectory
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where this file is located).
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2) COPY [.MISC.VMS]DESCRIP.MMS []*.*
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(Recursive invocations of `make' for the `bigcheck' test assume that the
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makefile will be found as descrip.mms in the current directory.)
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To build with VAX C for VAX/VMS:
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3) MMS /MACRO=("VAXC=1") FLEX.EXE
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(The /macro qualifier is optional in this case.)
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To build with GNU C for VAX/VMS:
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2.5) possibly edit descrip.mms to uncomment `SET COMMAND' for GCCINIT,
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depending on local site configuration
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3) MMS /MACRO=("GNUC=1") FLEX.EXE
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To build with DEC C for either VAX/VMS or Alpha/VMS:
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3) MMS /MACRO=("DECC=1") FLEX.EXE
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(Expect one or two informational messages from the compiler about
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implicitly declared functions.)
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Minimal testing of the resulting program:
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4) MMS CHECK
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(If `diff' reports no warnings, the test has succeeded.)
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More thorough testing:
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4.5) MMS /MACRO=("xxxC=1") BIGCHECK ! "xxxC=1" as in step #3 above
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(If using an older version of MMK rather than MMS, this might fail when
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`make' is invoked recursively due to excessive BYTLM usage by MMK.)
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Installation (the VMS makefile does not support an `install' target;
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you'll need to do this part manually):
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5) copy flex.exe, flex.doc, flex.skl, flexlib.olb, and FlexLexer.h to
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location(s) appropriate for your site. To use flex, define a "foreign"
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command by making a DCL symbol whose value begins with a dollar sign
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immediately followed by the filename for flex.exe, as in
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$ flex :== $local_tools:flex.exe
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where `local_tools:' is the logical name pointing to flex.exe's location.
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This symbol will ordinarily be a candidate for your login.com. When
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invoking flex, upper- or mixed-case command line options must be enclosed
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in quotes. For example,
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$ flex "-Pxyz" "-L" -t mylexer.l > mylexer.c
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(use prefix "xyz" instead of "yy", suppress `#line' compiler directives
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in the output, write the output to `stdout', process file mylexer.l,
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and capture `stdout' in file mylexer.c). As illustrated here, this VMS
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version of flex supports emulation of command line I/O redirection used
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by Unix shells.
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flex.exe -- the executable image for the flex program;
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flex.doc -- documentation, the "man page" describing flex (flex.1
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processed with `nroff -man' followed by `col -b');
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flex.skl -- a text file containing flex's default skeleton;
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with this version of flex, it is for reference only;
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flex.exe does not need to know where to find it;
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flexlib.olb -- an object library containing some support routines;
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you might need to link your generated lexer against
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it, depending on how your program is designed;
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flex.exe does not access it; it corresponds to
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`libfl.a' under Unix;
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FlexLexer.h -- header file used for C++ class-based lexers; not
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needed for ordinary C lexers.
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Notes:
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This VMS port of flex supports only the original Unix command line
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interface, not the native DCL interface which was available for flex 2.3.
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build.com -- DCL command procedure as alternative to descrip.mms;
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descrip.mms -- 2.5.x makefile for use with MMS or MMK (see step #1);
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mkskel.tpu -- TPU program used to make skel.c from flex.skl for full
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build from scratch; performs same function as mkskel.sh;
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vms-conf.h -- pre-configured `conf.in', copied to [-.-]config.h;
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vms-code.c -- VMS-specific support code, copied to [-.-]vms-code.c;
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README.VMS -- this file
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