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![Dag-Erling Smørgrav](/assets/img/avatar_default.png)
While lorder is not required by our current toolchain (or any toolchain we've used in the past decade or two), it still occasionally shows up in build systems of third party software, including The Open Group's UNIX conformance test suite, and the maintenance cost is negligible. MFC after: 1 week Sponsored by: Klara, Inc. Reviewed by: imp, allanjude, emaste Differential Revision: https://reviews.freebsd.org/D44135
95 lines
2.9 KiB
Groff
95 lines
2.9 KiB
Groff
.\" Copyright (c) 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd February 27, 2024
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.Dt LORDER 1
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.Os
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.Sh NAME
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.Nm lorder
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.Nd list dependencies for object files
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.Sh SYNOPSIS
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.Nm
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.Ar
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.Sh DESCRIPTION
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The
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.Nm
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utility uses
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.Xr nm 1
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to determine interdependencies between object files and library
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archives listed on its command line.
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It then outputs a list of pairs of file names such that the first file
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in each pair references at least one symbol defined by the second.
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.Pp
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The output is normally used with
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.Xr tsort 1
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when a library is created to determine the optimum ordering of the
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object modules so that all references may be resolved in a single
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pass of the loader.
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.Pp
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Similarly, when linking static binaries,
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.Nm
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and
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.Xr tsort 1
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can be used to sort libraries in order of dependency.
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.Pp
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While contemporary linkers no longer require the use of
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.Nm ,
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it is provided for the benefit of legacy code bases and build
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systems which still insist on it.
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.Sh ENVIRONMENT
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.Bl -tag -width indent
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.It Ev NM
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Path to the
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.Xr nm 1
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binary, defaults to
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.Dq Li nm .
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.It Ev NMFLAGS
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Flags to pass to
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.Xr nm 1 .
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.El
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.Sh EXAMPLES
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.Bd -literal -offset indent
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ar cr library.a `lorder ${OBJS} | tsort`
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cc -o foo ${OBJS} `lorder ${STATIC_LIBS} | tsort`
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.Ed
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.Sh SEE ALSO
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.Xr ar 1 ,
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.Xr ld 1 ,
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.Xr nm 1 ,
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.Xr ranlib 1 ,
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.Xr tsort 1
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.Sh HISTORY
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A
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.Nm
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utility appeared in
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.At v7 .
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.Sh CAVEATS
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The
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.Nm
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utility will not work properly if given file names with spaces or
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newlines in them.
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