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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