diff --git a/htl/Versions b/htl/Versions
index 710051756a..8dc460b280 100644
--- a/htl/Versions
+++ b/htl/Versions
@@ -3,6 +3,16 @@ libc {
   GLIBC_2.12 {
     pthread_self;
     __pthread_self;
+    pthread_attr_getdetachstate;
+    pthread_attr_getinheritsched;
+    pthread_attr_getschedparam;
+    pthread_attr_getschedpolicy;
+    pthread_attr_setdetachstate;
+    pthread_attr_setinheritsched;
+    pthread_attr_setschedpolicy;
+    pthread_equal;
+    pthread_getschedparam;
+    pthread_setschedparam;
   }
 
   GLIBC_2.21 {
diff --git a/sysdeps/htl/pt-attr-getdetachstate.c b/sysdeps/htl/pt-attr-getdetachstate.c
index 8b077e38f3..da27398260 100644
--- a/sysdeps/htl/pt-attr-getdetachstate.c
+++ b/sysdeps/htl/pt-attr-getdetachstate.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <pthread.h>
+#include <shlib-compat.h>
 #include <pt-internal.h>
 
 int
@@ -26,4 +27,8 @@ __pthread_attr_getdetachstate (const pthread_attr_t *attr, int *detachstate)
   return 0;
 }
 
-weak_alias (__pthread_attr_getdetachstate, pthread_attr_getdetachstate);
+versioned_symbol (libc, __pthread_attr_getdetachstate, pthread_attr_getdetachstate, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_attr_getdetachstate, pthread_attr_getdetachstate, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-attr-getinheritsched.c b/sysdeps/htl/pt-attr-getinheritsched.c
index 078face3eb..ba02e202c3 100644
--- a/sysdeps/htl/pt-attr-getinheritsched.c
+++ b/sysdeps/htl/pt-attr-getinheritsched.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <pthread.h>
+#include <shlib-compat.h>
 #include <pt-internal.h>
 
 int
@@ -26,4 +27,8 @@ __pthread_attr_getinheritsched (const pthread_attr_t *attr, int *inheritsched)
   return 0;
 }
 
-weak_alias (__pthread_attr_getinheritsched, pthread_attr_getinheritsched);
+versioned_symbol (libc, __pthread_attr_getinheritsched, pthread_attr_getinheritsched, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_attr_getinheritsched, pthread_attr_getinheritsched, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-attr-getschedparam.c b/sysdeps/htl/pt-attr-getschedparam.c
index 3fa001871e..35eeedc442 100644
--- a/sysdeps/htl/pt-attr-getschedparam.c
+++ b/sysdeps/htl/pt-attr-getschedparam.c
@@ -19,6 +19,7 @@
 #include <pthread.h>
 #include <sched.h>
 #include <string.h>
+#include <shlib-compat.h>
 
 #include <pt-internal.h>
 
@@ -30,4 +31,8 @@ __pthread_attr_getschedparam (const pthread_attr_t *attr,
   return 0;
 }
 
-weak_alias (__pthread_attr_getschedparam, pthread_attr_getschedparam);
+versioned_symbol (libc, __pthread_attr_getschedparam, pthread_attr_getschedparam, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_attr_getschedparam, pthread_attr_getschedparam, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-attr-getschedpolicy.c b/sysdeps/htl/pt-attr-getschedpolicy.c
index 8b4cc7ce48..5deaf01c5e 100644
--- a/sysdeps/htl/pt-attr-getschedpolicy.c
+++ b/sysdeps/htl/pt-attr-getschedpolicy.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <pthread.h>
+#include <shlib-compat.h>
 #include <pt-internal.h>
 
 int
@@ -26,4 +27,8 @@ __pthread_attr_getschedpolicy (const pthread_attr_t *attr, int *policy)
   return 0;
 }
 
-weak_alias (__pthread_attr_getschedpolicy, pthread_attr_getschedpolicy);
+versioned_symbol (libc, __pthread_attr_getschedpolicy, pthread_attr_getschedpolicy, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_attr_getschedpolicy, pthread_attr_getschedpolicy, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-attr-setdetachstate.c b/sysdeps/htl/pt-attr-setdetachstate.c
index b40557f816..26b6f91dc6 100644
--- a/sysdeps/htl/pt-attr-setdetachstate.c
+++ b/sysdeps/htl/pt-attr-setdetachstate.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <pthread.h>
+#include <shlib-compat.h>
 #include <pt-internal.h>
 
 int
@@ -35,4 +36,8 @@ __pthread_attr_setdetachstate (pthread_attr_t *attr, int detachstate)
   return 0;
 }
 
-weak_alias (__pthread_attr_setdetachstate, pthread_attr_setdetachstate);
+versioned_symbol (libc, __pthread_attr_setdetachstate, pthread_attr_setdetachstate, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_attr_setdetachstate, pthread_attr_setdetachstate, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-attr-setinheritsched.c b/sysdeps/htl/pt-attr-setinheritsched.c
index 533b805b12..c102b0cb12 100644
--- a/sysdeps/htl/pt-attr-setinheritsched.c
+++ b/sysdeps/htl/pt-attr-setinheritsched.c
@@ -35,4 +35,8 @@ __pthread_attr_setinheritsched (pthread_attr_t *attr, int inheritsched)
   return 0;
 }
 
-weak_alias (__pthread_attr_setinheritsched, pthread_attr_setinheritsched);
+versioned_symbol (libc, __pthread_attr_setinheritsched, pthread_attr_setinheritsched, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_attr_setinheritsched, pthread_attr_setinheritsched, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-attr-setschedpolicy.c b/sysdeps/htl/pt-attr-setschedpolicy.c
index d8086e8316..9648c774d0 100644
--- a/sysdeps/htl/pt-attr-setschedpolicy.c
+++ b/sysdeps/htl/pt-attr-setschedpolicy.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <pthread.h>
+#include <shlib-compat.h>
 #include <pt-internal.h>
 
 int
@@ -39,4 +40,8 @@ __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy)
   return 0;
 }
 
-weak_alias (__pthread_attr_setschedpolicy, pthread_attr_setschedpolicy);
+versioned_symbol (libc, __pthread_attr_setschedpolicy, pthread_attr_setschedpolicy, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_attr_setschedpolicy, pthread_attr_setschedpolicy, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-equal.c b/sysdeps/htl/pt-equal.c
index 6411110608..7727cca370 100644
--- a/sysdeps/htl/pt-equal.c
+++ b/sysdeps/htl/pt-equal.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <pthread.h>
+#include <shlib-compat.h>
 #include <pt-internal.h>
 
 /* Return true if __T1 and __T2 both name the same thread.  Otherwise,
@@ -27,4 +28,8 @@ __pthread_equal (pthread_t __t1, pthread_t __t2)
   return __t1 == __t2;
 }
 
-weak_alias (__pthread_equal, pthread_equal);
+versioned_symbol (libc, __pthread_equal, pthread_equal, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_equal, pthread_equal, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-getschedparam.c b/sysdeps/htl/pt-getschedparam.c
index 8ec3d54bd4..0c6a2d0ab3 100644
--- a/sysdeps/htl/pt-getschedparam.c
+++ b/sysdeps/htl/pt-getschedparam.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <pthread.h>
+#include <shlib-compat.h>
 #include <pt-internal.h>
 
 int
@@ -28,4 +29,8 @@ __pthread_getschedparam (pthread_t thread, int *policy,
   return 0;
 }
 
-weak_alias (__pthread_getschedparam, pthread_getschedparam);
+versioned_symbol (libc, __pthread_getschedparam, pthread_getschedparam, GLIBC_2_21);
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_getschedparam, pthread_getschedparam, GLIBC_2_12);
+#endif
diff --git a/sysdeps/htl/pt-setschedparam.c b/sysdeps/htl/pt-setschedparam.c
index aea4e7b0e4..5594c9f390 100644
--- a/sysdeps/htl/pt-setschedparam.c
+++ b/sysdeps/htl/pt-setschedparam.c
@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <pthread.h>
+#include <shlib-compat.h>
 #include <pt-internal.h>
 
 int
@@ -26,5 +27,9 @@ __pthread_setschedparam (pthread_t thread, int policy,
   return ENOSYS;
 }
 
-weak_alias (__pthread_setschedparam, pthread_setschedparam);
+versioned_symbol (libc, __pthread_setschedparam, pthread_setschedparam, GLIBC_2_21);
 stub_warning (pthread_setschedparam)
+
+#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_12, GLIBC_2_21)
+compat_symbol (libc, __pthread_setschedparam, pthread_setschedparam, GLIBC_2_12);
+#endif
diff --git a/sysdeps/mach/hurd/i386/libc.abilist b/sysdeps/mach/hurd/i386/libc.abilist
index 2adf98e71d..dc2c6b505b 100644
--- a/sysdeps/mach/hurd/i386/libc.abilist
+++ b/sysdeps/mach/hurd/i386/libc.abilist
@@ -29,7 +29,17 @@ GLIBC_2.11 mkostemps64 F
 GLIBC_2.11 mkstemps F
 GLIBC_2.11 mkstemps64 F
 GLIBC_2.12 __pthread_self F
+GLIBC_2.12 pthread_attr_getdetachstate F
+GLIBC_2.12 pthread_attr_getinheritsched F
+GLIBC_2.12 pthread_attr_getschedparam F
+GLIBC_2.12 pthread_attr_getschedpolicy F
+GLIBC_2.12 pthread_attr_setdetachstate F
+GLIBC_2.12 pthread_attr_setinheritsched F
+GLIBC_2.12 pthread_attr_setschedpolicy F
+GLIBC_2.12 pthread_equal F
+GLIBC_2.12 pthread_getschedparam F
 GLIBC_2.12 pthread_self F
+GLIBC_2.12 pthread_setschedparam F
 GLIBC_2.13 __fentry__ F
 GLIBC_2.14 syncfs F
 GLIBC_2.15 __fdelt_chk F
