diff --git a/gcc/ada/adaint.c b/gcc/ada/adaint.c
index 3b0aea9..ee0bb69 100644
--- a/gcc/ada/adaint.c
+++ b/gcc/ada/adaint.c
@@ -76,6 +76,11 @@
 #include <sys/param.h>
 #include <sys/pstat.h>
 #endif
+ 
+#if defined (linux)
+#define _GNU_SOURCE 1
+#include <sched.h>
+#endif
 
 #ifdef __PikeOS__
 #define __BSD_VISIBLE 1
@@ -3255,7 +3260,6 @@ __gnat_lwp_self (void)
 #endif
 
 #if defined (__linux__)
-#include <sched.h>
 
 /* glibc versions earlier than 2.7 do not define the routines to handle
    dynamically allocated CPU sets. For these targets, we use the static
@@ -3265,7 +3269,7 @@ __gnat_lwp_self (void)
 
 /* Dynamic cpu sets */
 
-cpu_set_t *
+void *
 __gnat_cpu_alloc (size_t count)
 {
   return CPU_ALLOC (count);
@@ -3278,33 +3282,33 @@ __gnat_cpu_alloc_size (size_t count)
 }
 
 void
-__gnat_cpu_free (cpu_set_t *set)
+__gnat_cpu_free (void *set)
 {
-  CPU_FREE (set);
+  CPU_FREE ((cpu_set_t *) set);
 }
 
 void
-__gnat_cpu_zero (size_t count, cpu_set_t *set)
+__gnat_cpu_zero (size_t count, void *set)
 {
-  CPU_ZERO_S (count, set);
+  CPU_ZERO_S (count, (cpu_set_t *) set);
 }
 
 void
-__gnat_cpu_set (int cpu, size_t count, cpu_set_t *set)
+__gnat_cpu_set (int cpu, size_t count, void *set)
 {
   /* Ada handles CPU numbers starting from 1, while C identifies the first
      CPU by a 0, so we need to adjust. */
-  CPU_SET_S (cpu - 1, count, set);
+  CPU_SET_S (cpu - 1, count, (cpu_set_t *) set);
 }
 
 #else /* !CPU_ALLOC */
 
 /* Static cpu sets */
 
-cpu_set_t *
+void *
 __gnat_cpu_alloc (size_t count ATTRIBUTE_UNUSED)
 {
-  return (cpu_set_t *) xmalloc (sizeof (cpu_set_t));
+  return xmalloc (sizeof (cpu_set_t));
 }
 
 size_t
@@ -3314,23 +3318,23 @@ __gnat_cpu_alloc_size (size_t count ATTRIBUTE_UNUSED)
 }
 
 void
-__gnat_cpu_free (cpu_set_t *set)
+__gnat_cpu_free (void *set)
 {
   free (set);
 }
 
 void
-__gnat_cpu_zero (size_t count ATTRIBUTE_UNUSED, cpu_set_t *set)
+__gnat_cpu_zero (size_t count ATTRIBUTE_UNUSED, void *set)
 {
-  CPU_ZERO (set);
+  CPU_ZERO ((cpu_set_t *) set);
 }
 
 void
-__gnat_cpu_set (int cpu, size_t count ATTRIBUTE_UNUSED, cpu_set_t *set)
+__gnat_cpu_set (int cpu, size_t count ATTRIBUTE_UNUSED, void *set)
 {
   /* Ada handles CPU numbers starting from 1, while C identifies the first
      CPU by a 0, so we need to adjust. */
-  CPU_SET (cpu - 1, set);
+  CPU_SET (cpu - 1, (cpu_set_t *) set);
 }
 #endif /* !CPU_ALLOC */
 #endif /* __linux__ */
diff --git a/gcc/ada/adaint.h b/gcc/ada/adaint.h
index 0d12f7e..a063b47 100644
--- a/gcc/ada/adaint.h
+++ b/gcc/ada/adaint.h
@@ -316,13 +316,11 @@ extern void   *__gnat_lwp_self			   (void);
 
 /* Routines for interface to required CPU set primitives */
 
-#include <sched.h>
-
-extern cpu_set_t *__gnat_cpu_alloc                 (size_t);
+extern void * __gnat_cpu_alloc                 (size_t);
 extern size_t __gnat_cpu_alloc_size                (size_t);
-extern void   __gnat_cpu_free                  (cpu_set_t *);
-extern void   __gnat_cpu_zero                      (size_t, cpu_set_t *);
-extern void   __gnat_cpu_set                       (int, size_t, cpu_set_t *);
+extern void   __gnat_cpu_free                  (void *);
+extern void   __gnat_cpu_zero                      (size_t, void *);
+extern void   __gnat_cpu_set                       (int, size_t, void *);
 #endif
 
 #if defined (_WIN32)
--- a/gcc/ada/Makefile.rtl	2019-05-14 21:18:45.217455681 +0200
+++ b/gcc/ada/Makefile.rtl	2019-05-14 21:21:30.686464218 +0200
@@ -1521,7 +1521,7 @@
   s-tpopsp.adb<libgnarl/s-tpopsp__tls.adb \
   $(TRASYM_DWARF_UNIX_PAIRS) \
   g-sercom.adb<libgnat/g-sercom__linux.adb \
-  s-tsmona.adb<libgnat/s-tsmona__linux.adb \
+  s-tsmona.adb<libgnat/s-tsmona.adb \
   a-exetim.adb<libgnarl/a-exetim__posix.adb \
   a-exetim.ads<libgnarl/a-exetim__default.ads \
   s-linux.ads<libgnarl/s-linux.ads \
@@ -2073,7 +2073,7 @@
   s-tpopsp.adb<libgnarl/s-tpopsp__tls.adb \
   g-sercom.adb<libgnat/g-sercom__linux.adb \
   $(TRASYM_DWARF_UNIX_PAIRS) \
-  s-tsmona.adb<libgnat/s-tsmona__linux.adb \
+  s-tsmona.adb<libgnat/s-tsmona.adb \
   $(ATOMICS_TARGET_PAIRS) \
   $(ATOMICS_BUILTINS_TARGET_PAIRS) \
   system.ads<libgnat/system-linux-ppc.ads
@@ -2102,7 +2102,7 @@
 endif
 
 # ARM linux, GNU eabi
-ifeq ($(strip $(filter-out arm% linux-gnueabi%,$(target_cpu) $(target_os))),)
+ifeq ($(strip $(filter-out arm% linux-gnueabi% linux-musleabi% linux-muslgnueabi%,$(target_cpu) $(target_os))),)
   LIBGNAT_TARGET_PAIRS = \
   a-intnam.ads<libgnarl/a-intnam__linux.ads \
   s-inmaop.adb<libgnarl/s-inmaop__posix.adb \
@@ -2297,7 +2297,7 @@
   s-taspri.ads<libgnarl/s-taspri__posix-noaltstack.ads \
   g-sercom.adb<libgnat/g-sercom__linux.adb \
   $(TRASYM_DWARF_UNIX_PAIRS) \
-  s-tsmona.adb<libgnat/s-tsmona__linux.adb \
+  s-tsmona.adb<libgnat/s-tsmona.adb \
   $(ATOMICS_TARGET_PAIRS) \
   $(ATOMICS_BUILTINS_TARGET_PAIRS) \
   system.ads<libgnat/system-linux-ia64.ads
@@ -2394,7 +2394,7 @@
   s-taspri.ads<libgnarl/s-taspri__posix.ads \
   g-sercom.adb<libgnat/g-sercom__linux.adb \
   $(TRASYM_DWARF_UNIX_PAIRS) \
-  s-tsmona.adb<libgnat/s-tsmona__linux.adb \
+  s-tsmona.adb<libgnat/s-tsmona.adb \
   $(ATOMICS_TARGET_PAIRS) \
   $(X86_64_TARGET_PAIRS) \
   system.ads<libgnat/system-linux-x86.ads
--- a/gcc/ada/terminals.c	2019-01-08 10:54:04.000000000 +0100
+++ b/gcc/ada/terminals.c	2019-05-15 13:14:09.935742526 +0200
@@ -1136,7 +1136,7 @@
 /* POSIX does not specify how to open the master side of a terminal.Several
    methods are available (system specific):
       1- using a cloning device (USE_CLONE_DEVICE)
-      2- getpt                  (USE_GETPT)
+      2- posix_openpt           (USE_POSIX_OPENPT)
       3- openpty                (USE_OPENPTY)
 
    When using the cloning device method, the macro USE_CLONE_DEVICE should
@@ -1150,7 +1150,7 @@
 #if defined (__APPLE__) || defined (BSD)
 #define USE_OPENPTY
 #elif defined (__linux__)
-#define USE_GETPT
+#define USE_POSIX_OPENPT
 #elif defined (__sun__)
 #define USE_CLONE_DEVICE "/dev/ptmx"
 #elif defined (_AIX)
@@ -1199,8 +1199,8 @@
    int  master_fd   = -1;
    char *slave_name = NULL;
 
-#ifdef USE_GETPT
-  master_fd = getpt ();
+#if defined(USE_POSIX_OPENPT)
+  master_fd = posix_openpt(O_RDWR | O_NOCTTY);
 #elif defined (USE_OPENPTY)
   status = openpty (&master_fd, &slave_fd, NULL, NULL, NULL);
 #elif defined (USE_CLONE_DEVICE)