391 lines
13 KiB
Groff
391 lines
13 KiB
Groff
.\" $FreeBSD$
|
|
.\" Man page generated from reStructuredText.
|
|
.
|
|
.TH "LLVM-AR" "1" "2015-05-30" "3.7" "LLVM"
|
|
.SH NAME
|
|
llvm-ar \- LLVM archiver
|
|
.
|
|
.nr rst2man-indent-level 0
|
|
.
|
|
.de1 rstReportMargin
|
|
\\$1 \\n[an-margin]
|
|
level \\n[rst2man-indent-level]
|
|
level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
|
|
-
|
|
\\n[rst2man-indent0]
|
|
\\n[rst2man-indent1]
|
|
\\n[rst2man-indent2]
|
|
..
|
|
.de1 INDENT
|
|
.\" .rstReportMargin pre:
|
|
. RS \\$1
|
|
. nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin]
|
|
. nr rst2man-indent-level +1
|
|
.\" .rstReportMargin post:
|
|
..
|
|
.de UNINDENT
|
|
. RE
|
|
.\" indent \\n[an-margin]
|
|
.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]]
|
|
.nr rst2man-indent-level -1
|
|
.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
|
|
.in \\n[rst2man-indent\\n[rst2man-indent-level]]u
|
|
..
|
|
.SH SYNOPSIS
|
|
.sp
|
|
\fBllvm\-ar\fP [\-]{dmpqrtx}[Rabfikou] [relpos] [count] <archive> [files...]
|
|
.SH DESCRIPTION
|
|
.sp
|
|
The \fBllvm\-ar\fP command is similar to the common Unix utility, \fBar\fP\&. It
|
|
archives several files together into a single file. The intent for this is
|
|
to produce archive libraries by LLVM bitcode that can be linked into an
|
|
LLVM program. However, the archive can contain any kind of file. By default,
|
|
\fBllvm\-ar\fP generates a symbol table that makes linking faster because
|
|
only the symbol table needs to be consulted, not each individual file member
|
|
of the archive.
|
|
.sp
|
|
The \fBllvm\-ar\fP command can be used to \fIread\fP SVR4, GNU and BSD style archive
|
|
files. However, right now it can only write in the GNU format. If an
|
|
SVR4 or BSD style archive is used with the \fBr\fP (replace) or \fBq\fP (quick
|
|
update) operations, the archive will be reconstructed in GNU format.
|
|
.sp
|
|
Here\(aqs where \fBllvm\-ar\fP departs from previous \fBar\fP implementations:
|
|
.sp
|
|
\fISymbol Table\fP
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Since \fBllvm\-ar\fP supports bitcode files. The symbol table it creates
|
|
is in GNU format and includes both native and bitcode files.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
\fILong Paths\fP
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Currently \fBllvm\-ar\fP can read GNU and BSD long file names, but only writes
|
|
archives with the GNU format.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.SH OPTIONS
|
|
.sp
|
|
The options to \fBllvm\-ar\fP are compatible with other \fBar\fP implementations.
|
|
However, there are a few modifiers (\fIR\fP) that are not found in other \fBar\fP
|
|
implementations. The options to \fBllvm\-ar\fP specify a single basic operation to
|
|
perform on the archive, a variety of modifiers for that operation, the name of
|
|
the archive file, and an optional list of file names. These options are used to
|
|
determine how \fBllvm\-ar\fP should process the archive file.
|
|
.sp
|
|
The Operations and Modifiers are explained in the sections below. The minimal
|
|
set of options is at least one operator and the name of the archive. Typically
|
|
archive files end with a \fB\&.a\fP suffix, but this is not required. Following
|
|
the \fIarchive\-name\fP comes a list of \fIfiles\fP that indicate the specific members
|
|
of the archive to operate on. If the \fIfiles\fP option is not specified, it
|
|
generally means either "none" or "all" members, depending on the operation.
|
|
.SS Operations
|
|
.sp
|
|
d
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Delete files from the archive. No modifiers are applicable to this operation.
|
|
The \fIfiles\fP options specify which members should be removed from the
|
|
archive. It is not an error if a specified file does not appear in the archive.
|
|
If no \fIfiles\fP are specified, the archive is not modified.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
m[abi]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Move files from one location in the archive to another. The \fIa\fP, \fIb\fP, and
|
|
\fIi\fP modifiers apply to this operation. The \fIfiles\fP will all be moved
|
|
to the location given by the modifiers. If no modifiers are used, the files
|
|
will be moved to the end of the archive. If no \fIfiles\fP are specified, the
|
|
archive is not modified.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
p
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Print files to the standard output. This operation simply prints the
|
|
\fIfiles\fP indicated to the standard output. If no \fIfiles\fP are
|
|
specified, the entire archive is printed. Printing bitcode files is
|
|
ill\-advised as they might confuse your terminal settings. The \fIp\fP
|
|
operation never modifies the archive.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
q
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Quickly append files to the end of the archive. This operation quickly adds the
|
|
\fIfiles\fP to the archive without checking for duplicates that should be
|
|
removed first. If no \fIfiles\fP are specified, the archive is not modified.
|
|
Because of the way that \fBllvm\-ar\fP constructs the archive file, its dubious
|
|
whether the \fIq\fP operation is any faster than the \fIr\fP operation.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
r[abu]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Replace or insert file members. The \fIa\fP, \fIb\fP, and \fIu\fP
|
|
modifiers apply to this operation. This operation will replace existing
|
|
\fIfiles\fP or insert them at the end of the archive if they do not exist. If no
|
|
\fIfiles\fP are specified, the archive is not modified.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
t[v]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Print the table of contents. Without any modifiers, this operation just prints
|
|
the names of the members to the standard output. With the \fIv\fP modifier,
|
|
\fBllvm\-ar\fP also prints out the file type (B=bitcode, S=symbol
|
|
table, blank=regular file), the permission mode, the owner and group, the
|
|
size, and the date. If any \fIfiles\fP are specified, the listing is only for
|
|
those files. If no \fIfiles\fP are specified, the table of contents for the
|
|
whole archive is printed.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
x[oP]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
Extract archive members back to files. The \fIo\fP modifier applies to this
|
|
operation. This operation retrieves the indicated \fIfiles\fP from the archive
|
|
and writes them back to the operating system\(aqs file system. If no
|
|
\fIfiles\fP are specified, the entire archive is extract.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.SS Modifiers (operation specific)
|
|
.sp
|
|
The modifiers below are specific to certain operations. See the Operations
|
|
section (above) to determine which modifiers are applicable to which operations.
|
|
.sp
|
|
[a]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
When inserting or moving member files, this option specifies the destination of
|
|
the new files as being after the \fIrelpos\fP member. If \fIrelpos\fP is not found,
|
|
the files are placed at the end of the archive.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
[b]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
When inserting or moving member files, this option specifies the destination of
|
|
the new files as being before the \fIrelpos\fP member. If \fIrelpos\fP is not
|
|
found, the files are placed at the end of the archive. This modifier is
|
|
identical to the \fIi\fP modifier.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
[i]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
A synonym for the \fIb\fP option.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
[o]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
When extracting files, this option will cause \fBllvm\-ar\fP to preserve the
|
|
original modification times of the files it writes.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
[u]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
When replacing existing files in the archive, only replace those files that have
|
|
a time stamp than the time stamp of the member in the archive.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.SS Modifiers (generic)
|
|
.sp
|
|
The modifiers below may be applied to any operation.
|
|
.sp
|
|
[c]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
For all operations, \fBllvm\-ar\fP will always create the archive if it doesn\(aqt
|
|
exist. Normally, \fBllvm\-ar\fP will print a warning message indicating that the
|
|
archive is being created. Using this modifier turns off that warning.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
[s]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This modifier requests that an archive index (or symbol table) be added to the
|
|
archive. This is the default mode of operation. The symbol table will contain
|
|
all the externally visible functions and global variables defined by all the
|
|
bitcode files in the archive.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
[S]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This modifier is the opposite of the \fIs\fP modifier. It instructs \fBllvm\-ar\fP to
|
|
not build the symbol table. If both \fIs\fP and \fIS\fP are used, the last modifier to
|
|
occur in the options will prevail.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
[v]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This modifier instructs \fBllvm\-ar\fP to be verbose about what it is doing. Each
|
|
editing operation taken against the archive will produce a line of output saying
|
|
what is being done.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.SH STANDARDS
|
|
.sp
|
|
The \fBllvm\-ar\fP utility is intended to provide a superset of the IEEE Std 1003.2
|
|
(POSIX.2) functionality for \fBar\fP\&. \fBllvm\-ar\fP can read both SVR4 and BSD4.4 (or
|
|
Mac OS X) archives. If the \fBf\fP modifier is given to the \fBx\fP or \fBr\fP operations
|
|
then \fBllvm\-ar\fP will write SVR4 compatible archives. Without this modifier,
|
|
\fBllvm\-ar\fP will write BSD4.4 compatible archives that have long names
|
|
immediately after the header and indicated using the "#1/ddd" notation for the
|
|
name in the header.
|
|
.SH FILE FORMAT
|
|
.sp
|
|
The file format for LLVM Archive files is similar to that of BSD 4.4 or Mac OSX
|
|
archive files. In fact, except for the symbol table, the \fBar\fP commands on those
|
|
operating systems should be able to read LLVM archive files. The details of the
|
|
file format follow.
|
|
.sp
|
|
Each archive begins with the archive magic number which is the eight printable
|
|
characters "!<arch>n" where n represents the newline character (0x0A).
|
|
Following the magic number, the file is composed of even length members that
|
|
begin with an archive header and end with a n padding character if necessary
|
|
(to make the length even). Each file member is composed of a header (defined
|
|
below), an optional newline\-terminated "long file name" and the contents of
|
|
the file.
|
|
.sp
|
|
The fields of the header are described in the items below. All fields of the
|
|
header contain only ASCII characters, are left justified and are right padded
|
|
with space characters.
|
|
.sp
|
|
name \- char[16]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This field of the header provides the name of the archive member. If the name is
|
|
longer than 15 characters or contains a slash (/) character, then this field
|
|
contains \fB#1/nnn\fP where \fBnnn\fP provides the length of the name and the \fB#1/\fP
|
|
is literal. In this case, the actual name of the file is provided in the \fBnnn\fP
|
|
bytes immediately following the header. If the name is 15 characters or less, it
|
|
is contained directly in this field and terminated with a slash (/) character.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
date \- char[12]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This field provides the date of modification of the file in the form of a
|
|
decimal encoded number that provides the number of seconds since the epoch
|
|
(since 00:00:00 Jan 1, 1970) per Posix specifications.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
uid \- char[6]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This field provides the user id of the file encoded as a decimal ASCII string.
|
|
This field might not make much sense on non\-Unix systems. On Unix, it is the
|
|
same value as the st_uid field of the stat structure returned by the stat(2)
|
|
operating system call.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
gid \- char[6]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This field provides the group id of the file encoded as a decimal ASCII string.
|
|
This field might not make much sense on non\-Unix systems. On Unix, it is the
|
|
same value as the st_gid field of the stat structure returned by the stat(2)
|
|
operating system call.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
mode \- char[8]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This field provides the access mode of the file encoded as an octal ASCII
|
|
string. This field might not make much sense on non\-Unix systems. On Unix, it
|
|
is the same value as the st_mode field of the stat structure returned by the
|
|
stat(2) operating system call.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
size \- char[10]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This field provides the size of the file, in bytes, encoded as a decimal ASCII
|
|
string.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
fmag \- char[2]
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
This field is the archive file member magic number. Its content is always the
|
|
two characters back tick (0x60) and newline (0x0A). This provides some measure
|
|
utility in identifying archive files that have been corrupted.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
offset \- vbr encoded 32\-bit integer
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
The offset item provides the offset into the archive file where the bitcode
|
|
member is stored that is associated with the symbol. The offset value is 0
|
|
based at the start of the first "normal" file member. To derive the actual
|
|
file offset of the member, you must add the number of bytes occupied by the file
|
|
signature (8 bytes) and the symbol tables. The value of this item is encoded
|
|
using variable bit rate encoding to reduce the size of the symbol table.
|
|
Variable bit rate encoding uses the high bit (0x80) of each byte to indicate
|
|
if there are more bytes to follow. The remaining 7 bits in each byte carry bits
|
|
from the value. The final byte does not have the high bit set.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
length \- vbr encoded 32\-bit integer
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
The length item provides the length of the symbol that follows. Like this
|
|
\fIoffset\fP item, the length is variable bit rate encoded.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.sp
|
|
symbol \- character array
|
|
.INDENT 0.0
|
|
.INDENT 3.5
|
|
The symbol item provides the text of the symbol that is associated with the
|
|
\fIoffset\fP\&. The symbol is not terminated by any character. Its length is provided
|
|
by the \fIlength\fP field. Note that is allowed (but unwise) to use non\-printing
|
|
characters (even 0x00) in the symbol. This allows for multiple encodings of
|
|
symbol names.
|
|
.UNINDENT
|
|
.UNINDENT
|
|
.SH EXIT STATUS
|
|
.sp
|
|
If \fBllvm\-ar\fP succeeds, it will exit with 0. A usage error, results
|
|
in an exit code of 1. A hard (file system typically) error results in an
|
|
exit code of 2. Miscellaneous or unknown errors result in an
|
|
exit code of 3.
|
|
.SH SEE ALSO
|
|
.sp
|
|
ar(1)
|
|
.SH AUTHOR
|
|
Maintained by The LLVM Team (http://llvm.org/).
|
|
.SH COPYRIGHT
|
|
2003-2014, LLVM Project
|
|
.\" Generated by docutils manpage writer.
|
|
.
|