Back out my change from 6 April PDT that added a new dlversion()

function.  It was an ill-considered feature.  It didn't solve the
problem I wanted it to solve.   And it added Yet Another Version
Number that would have to be maintained at every release point.
I'm nuking it now before anybody grows too fond of it.

2 files changed, 1 insertions, 33 deletions

diff --git a/lib/libc/gen/dlfcn.c b/lib/libc/gen/dlfcn.c
index 38b9553..d684fd9 100644
--- a/lib/libc/gen/dlfcn.c
+++ b/lib/libc/gen/dlfcn.c
@@ -94,14 +94,6 @@ dlsym(void *handle, const char *name)
 	return NULL;
 }
 
-#pragma weak dlversion
-int
-dlversion(void)
-{
-	_rtld_error(sorry);
-	return 0;
-}
-
 #else /* a.out format */
 
 #include <sys/types.h>
@@ -173,11 +165,4 @@ dlsym(void *handle, const char *name)
 		return (__ldso_entry->dlsym)(handle, name);
 }
 
-/* We don't support dlversion() on a.out systems. */
-int
-dlversion(void)
-{
-	return 0;
-}
-
 #endif /* __ELF__ */
diff --git a/lib/libc/gen/dlopen.3 b/lib/libc/gen/dlopen.3
index e56e3ae..9e848f9 100644
--- a/lib/libc/gen/dlopen.3
+++ b/lib/libc/gen/dlopen.3
@@ -34,7 +34,7 @@
 .Os FreeBSD
 .Dt DLOPEN 3
 .Sh NAME
-.Nm dlopen, dlsym, dlerror, dlclose, dlversion
+.Nm dlopen, dlsym, dlerror, dlclose
 .Nd programmatic interface to the dynamic linker
 .Sh SYNOPSIS
 .Fd #include <dlfcn.h>
@@ -46,8 +46,6 @@
 .Fn dlerror "void"
 .Ft int
 .Fn dlclose "void *handle"
-.Ft int
-.Fn dlversion "void"
 .Sh DESCRIPTION
 These functions provide a simple programmatic interface to the services of the
 dynamic linker.
@@ -221,19 +219,6 @@ The object-intrinsic functions
 and
 .Fn _fini
 are called with no arguments, and are not expected to return values.
-.Pp
-.Fn dlversion
-returns the version number of the dynamic linker.  Interpreted
-as a decimal number, the version number has the form
-.Em rrrsss .
-.Em rrr
-corresponds to the base operating system release version, e.g., 400
-for release 4.0.0.
-.Em sss
-is a serial number that increases monotonically within each release
-version.  If the installed dynamic linker is too old to support
-.Fn dlversion ,
-0 is returned.
 .Sh NOTES
 ELF executables need to be linked
 using the
@@ -249,8 +234,6 @@ and
 return the null pointer in the event of errors.
 .Fn dlclose
 returns 0 on success, or -1 if an error occurred.
-.Fn dlversion
-returns 0 if the dynamic linker is too old to support it.
 Whenever an error has been detected, a message detailing it can be
 retrieved via a call to
 .Fn dlerror .