mirror of
https://github.com/etlegacy/etlegacy-libs.git
synced 2024-11-15 00:51:38 +00:00
118 lines
3 KiB
Groff
118 lines
3 KiB
Groff
.\" $Id: luac.man,v 1.29 2011/11/16 13:53:40 lhf Exp $
|
|
.TH LUAC 1 "$Date: 2011/11/16 13:53:40 $"
|
|
.SH NAME
|
|
luac \- Lua compiler
|
|
.SH SYNOPSIS
|
|
.B luac
|
|
[
|
|
.I options
|
|
] [
|
|
.I filenames
|
|
]
|
|
.SH DESCRIPTION
|
|
.B luac
|
|
is the Lua compiler.
|
|
It translates programs written in the Lua programming language
|
|
into binary files containing precompiled chunks
|
|
that can be later loaded and executed.
|
|
.LP
|
|
The main advantages of precompiling chunks are:
|
|
faster loading,
|
|
protecting source code from accidental user changes,
|
|
and
|
|
off-line syntax checking.
|
|
Precompiling does not imply faster execution
|
|
because in Lua chunks are always compiled into bytecodes before being executed.
|
|
.B luac
|
|
simply allows those bytecodes to be saved in a file for later execution.
|
|
Precompiled chunks are not necessarily smaller than the corresponding source.
|
|
The main goal in precompiling is faster loading.
|
|
.LP
|
|
In the command line,
|
|
you can mix
|
|
text files containing Lua source and
|
|
binary files containing precompiled chunks.
|
|
.B luac
|
|
produces a single output file containing the combined bytecodes
|
|
for all files given.
|
|
Executing the combined file is equivalent to executing the given files.
|
|
By default,
|
|
the output file is named
|
|
.BR luac.out ,
|
|
but you can change this with the
|
|
.B \-o
|
|
option.
|
|
.LP
|
|
Precompiled chunks are
|
|
.I not
|
|
portable across different architectures.
|
|
Moreover,
|
|
the internal format of precompiled chunks
|
|
is likely to change when a new version of Lua is released.
|
|
Make sure you save the source files of all Lua programs that you precompile.
|
|
.LP
|
|
.SH OPTIONS
|
|
.TP
|
|
.B \-l
|
|
produce a listing of the compiled bytecode for Lua's virtual machine.
|
|
Listing bytecodes is useful to learn about Lua's virtual machine.
|
|
If no files are given, then
|
|
.B luac
|
|
loads
|
|
.B luac.out
|
|
and lists its contents.
|
|
Use
|
|
.B \-l \-l
|
|
for a full listing.
|
|
.TP
|
|
.BI \-o " file"
|
|
output to
|
|
.IR file ,
|
|
instead of the default
|
|
.BR luac.out .
|
|
(You can use
|
|
.B "'\-'"
|
|
for standard output,
|
|
but not on platforms that open standard output in text mode.)
|
|
The output file may be one of the given files because
|
|
all files are loaded before the output file is written.
|
|
Be careful not to overwrite precious files.
|
|
.TP
|
|
.B \-p
|
|
load files but do not generate any output file.
|
|
Used mainly for syntax checking and for testing precompiled chunks:
|
|
corrupted files will probably generate errors when loaded.
|
|
If no files are given, then
|
|
.B luac
|
|
loads
|
|
.B luac.out
|
|
and tests its contents.
|
|
No messages are displayed if the file loads without errors.
|
|
.TP
|
|
.B \-s
|
|
strip debug information before writing the output file.
|
|
This saves some space in very large chunks,
|
|
but if errors occur when running a stripped chunk,
|
|
then the error messages may not contain the full information they usually do.
|
|
In particular,
|
|
line numbers and names of local variables are lost.
|
|
.TP
|
|
.B \-v
|
|
show version information.
|
|
.TP
|
|
.B \-\-
|
|
stop handling options.
|
|
.TP
|
|
.B \-
|
|
stop handling options and process standard input.
|
|
.SH "SEE ALSO"
|
|
.BR lua (1)
|
|
.br
|
|
The documentation at lua.org.
|
|
.SH DIAGNOSTICS
|
|
Error messages should be self explanatory.
|
|
.SH AUTHORS
|
|
R. Ierusalimschy,
|
|
L. H. de Figueiredo,
|
|
W. Celes
|
|
.\" EOF
|