Copyright (c) 1996 Matthew R. Green
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.Dd July 21, 2004 .Dt LD.SO.CONF 5 .Os .Sh NAME .Nm ld.so.conf .Nd run-time link-editor configuration file .Sh DESCRIPTION The .Nm file specifies additional default directories (beyond the standard set, normally .Dq Pa /usr/lib ) .
p On .Xr a.out 5 systems, this file is scanned by .Xr ldconfig 8 to create the hints files used by the run-time linker
a /usr/libexec/ld.so to locate shared libraries.
p On .Xr elf 5 systems, this file is scanned directly by the run-time linker
p Lines beginning with .Sq # are treated as comments and ignored. Any other non-blank lines beginning with .Sq / are stripped of leading whitespace and trailing comments (introduced with .Sq # ) together with any preceding whitespace, then treated as directories to be scanned for shared libraries to add to the hints.
p On .Xr elf 5 lines that do not begin with a .Sq / are parsed as hardware dependent per library directives: d -literal <library> <sysctl> <variable>[,...]:<library>[,...] ... .Ed
p If there is no match, the standard action is taken. .Sh FILES
a /etc/ld.so.conf .Sh EXAMPLES d -literal libm.so.0 machdep.fpu_present 1:libm387.so.0,libm.so.0 .Ed
p The above line loads both libm387 and libm when the .Xr sysctl 3 variable fpu_present has the value 1. .Sh SEE ALSO .Xr ld.aout_so 1 , .Xr ld.elf_so 1 , .Xr a.out 5 , .Xr elf 5 , .Xr ldconfig 8 .Sh HISTORY The .Nm file appeared in .Nx 1.3 . The ELF support for it was added in .Nx 1.5 . .Sh BUGS Directory names containing the comment character
q Sq # and/or leading or trailing whitespace cannot be included. (Embedded blanks are allowed, however.)