build-sys: merge libsystemd-login into libsystemd

A compatibility libsystemd-login library is created which uses
.symver and ifunc magic proposed by Lennart to make programs linked
to the old library name continue to work seamlessly.

Unfortunately the bfd linker crashes:
  https://sourceware.org/bugzilla/show_bug.cgi?id=16467
This will be fixed in binutils 2.25.

As a work-around, gold can be used:
  LDFLAGS=-Wl,-fuse-ld=gold

Unfortunately the switch to pick the linker appeared in gcc 4.8.

This also doesn't work with LLVM:
  http://llvm.org/bugs/show_bug.cgi?id=11897

1 files changed, 0 insertions, 7 deletions

diff --git a/src/login/libsystemd-login.sym b/src/login/libsystemd-login.sym
index 1d3398253c..54aa91c609 100644
--- a/src/login/libsystemd-login.sym
+++ b/src/login/libsystemd-login.sym
@@ -85,10 +85,3 @@ LIBSYSTEMD_LOGIN_207 {
 global:
         sd_session_get_vt;
 } LIBSYSTEMD_LOGIN_205;
-
-LIBSYSTEMD_LOGIN_209 {
-global:
-        sd_session_is_remote;
-        sd_session_get_remote_user;
-        sd_session_get_remote_host;
-} LIBSYSTEMD_LOGIN_207;