Musl's <sched.h> uses calloc() which is marked as poisoned by GCC's
"system.h". Work around that by making sure that <sched.h> gets
included first.

--- gcc-13.2.0/gcc/ada/adaint.c
+++ gcc-13.2.0.musl/gcc/ada/adaint.c
@@ -101,6 +101,10 @@
 #include <sys/time.h>
 #endif
 
+#if defined (__linux__)
+#include <sched.h>
+#endif
+
 #ifdef IN_RTS
 
 #ifdef STANDALONE
@@ -3441,7 +3445,6 @@
 #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
--- gcc-13.2.0/gcc/ada/argv.c
+++ gcc-13.2.0.musl/gcc/ada/argv.c
@@ -42,6 +42,8 @@
    main program, and these routines are accessed from the
    Ada.Command_Line.Environment package.  */
 
+#include "adaint.h"
+
 #ifdef IN_RTS
 #include "runtime.h"
 #include <stdlib.h>
@@ -50,8 +52,6 @@
 #include "config.h"
 #include "system.h"
 #endif
-
-#include "adaint.h"
 
 #ifdef __cplusplus
 extern "C" {
--- gcc-13.2.0/gcc/ada/cio.c
+++ gcc-13.2.0.musl/gcc/ada/cio.c
@@ -29,6 +29,8 @@
  *                                                                          *
  ****************************************************************************/
 
+#include "adaint.h"
+
 #ifdef IN_RTS
 #include "runtime.h"
 #include <sys/stat.h>
@@ -36,8 +38,6 @@
 #include "config.h"
 #include "system.h"
 #endif
-
-#include "adaint.h"
 
 /* We need L_tmpnam definition */
 #include <stdio.h>
--- gcc-13.2.0/gcc/ada/cstreams.c
+++ gcc-13.2.0.musl/gcc/ada/cstreams.c
@@ -58,14 +58,14 @@
 #include "vxWorks.h"
 #endif
 
+#include "adaint.h"
+
 #ifdef IN_RTS
 #include <string.h>
 #else
 #include "config.h"
 #include "system.h"
 #endif
-
-#include "adaint.h"
 
 #ifdef __cplusplus
 extern "C" {
--- gcc-13.2.0/gcc/ada/init.c
+++ gcc-13.2.0.musl/gcc/ada/init.c
@@ -53,6 +53,8 @@
 #undef __linux__
 #endif
 
+#include "adaint.h"
+
 #ifdef IN_RTS
 
 #ifdef STANDALONE
@@ -71,7 +73,6 @@
 #include "system.h"
 #endif
 
-#include "adaint.h"
 #include "raise.h"
 
 #ifdef __cplusplus
--- gcc-13.2.0/gcc/ada/raise.c
+++ gcc-13.2.0.musl/gcc/ada/raise.c
@@ -32,6 +32,8 @@
 /* Shared routines to support exception handling.  __gnat_unhandled_terminate
    is shared between all exception handling mechanisms.  */
 
+#include "adaint.h"
+
 #ifdef IN_RTS
 #include "runtime.h"
 #else
@@ -39,7 +41,6 @@
 #include "system.h"
 #endif
 
-#include "adaint.h"
 #include "raise.h"
 
 #ifdef __cplusplus