ldconfig.8: Drop discussion of libc4,5 support.

Drop multiple paragraphs discussing libc4 and libc5 shared library
support.  It was removed upstream in July; annotate commit.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/man8/ldconfig.8 b/man8/ldconfig.8
index de2b7a5c389cf2972d94375397b41569c0510c0a..36b891dabd6f0b61e94ca617ab2b8f4e9bcfb00a 100644 (file)
--- a/man8/ldconfig.8
+++ b/man8/ldconfig.8
@@ -57,40 +57,9 @@ or
 .B \%ldconfig
 checks the header and filenames of the libraries it encounters when
 determining which versions should have their links updated.
-.PP
-.B \%ldconfig
-will attempt to deduce the type of ELF libraries
-(i.e.,
-libc5 or libc6/glibc)
-based on what C libraries,
-if any,
-the library was linked against.
-.\" The following sentence looks suspect
-.\" (perhaps historical cruft) -- MTK, Jul 2005
-.\" Therefore, when making dynamic libraries,
-.\" it is wise to explicitly link against libc (use \-lc).
-.PP
-Some existing libraries do not contain enough information
-to allow the deduction of their type.
-Therefore,
-the
-.I /etc/ld.so.conf
-file format allows the specification of an expected type.
-This is used
-.I only
-for those ELF libraries which we can not work out.
-The format
-is "dirname=TYPE",
-where TYPE can be libc4,
-libc5,
-or libc6.
-(This syntax also works on the command line.)
-Spaces are
-.I not
-allowed.
-Also see the
-.B \-p
-option.
+.\" Support for libc4 and libc5 dropped in
+.\" 8ee878592c4a642937152c8308b8faef86bcfc40 (2022-07-14) as "obsolete
+.\" for over twenty years".
 .B \%ldconfig
 should normally be run by the superuser as it may require write
 permission on some root owned directories and files.