Added flush of output on exit. On some UNIX's using the native library

resulted in no output when the output was redirected until this was done.
Redirection is important because runtest redirects test output.

Added support for numerous environment variables which make it easier
to run a multi-node system using a single executable and to tailor
the size of the workspace and heap.

c/src/lib/libbsp/unix/posix/startup/bspclean.c

@@ -22,6 +22,8 @@
 #include <rtems.h>
 #include <bsp.h>
 
+#include <stdio.h>
+
 /*
  * The app has "exited" (called rtems_shutdown_executive)
  */
@@ -33,5 +35,8 @@ void bsp_cleanup( void )
      * By definition, rtems_fatal_error_occurred does not return.
      */
 
+fflush(stdout);
+fflush(stderr);
+
     rtems_fatal_error_occurred(0);
 }

c/src/lib/libbsp/unix/posix/startup/bspstart.c

@@ -33,7 +33,6 @@
 #include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <sys/stat.h>
 
 #include <bsp.h>
 #include <libcsupport.h>
@@ -58,11 +57,13 @@ int                          rtems_argc;
 char                       **rtems_argv;
 char                       **rtems_envp;
 
+/*
+ * May be overridden by RTEMS_WORKSPACE_SIZE and RTEMS_HEAPSPACE_SIZE
+ * environment variables; see below.
+ */
 
-#define WORKSPACE_SIZE (WORKSPACE_MB * (1024 * 1024))
+#define DEFAULT_WORKSPACE_SIZE (WORKSPACE_MB * (1024 * 1024))
-#define HEAPSPACE_SIZE (HEAPSPACE_MB * (1024 * 1024))
+#define DEFAULT_HEAPSPACE_SIZE (HEAPSPACE_MB * (1024 * 1024))
-
-rtems_unsigned8   MY_WORK_SPACE[ WORKSPACE_SIZE ] CPU_STRUCTURE_ALIGNMENT;
 
 /*
  * Amount to increment itimer by each pass
@@ -102,7 +103,11 @@ bsp_libc_init(void)
 {
     void *heap_start;
 
-    Heap_size = HEAPSPACE_SIZE;
+    if (getenv("RTEMS_HEAPSPACE_SIZE"))
+        Heap_size = strtol(getenv("RTEMS_HEAPSPACE_SIZE"), 0, 0);
+    else
+        Heap_size = DEFAULT_HEAPSPACE_SIZE;
+ 
     heap_start = 0;
 
     RTEMS_Malloc_Initialize((void *)heap_start, Heap_size, 1024 * 1024);
@@ -185,11 +190,7 @@ bsp_pretasking_hook(void)
 void
 bsp_start(void)
 {
-    struct stat  stat_buf;
+    unsigned32 workspace_ptr;
-    char         buf[256];
-    char         node[6];
-    char        *home;
-    int          fd;
 
     /*
      *  Copy the table
@@ -199,34 +200,28 @@ bsp_start(void)
  
     /*
      *  If the node number is -1 then the application better provide
-     * it through the file $HOME/rtems_node
+     *  it through environment variables RTEMS_NODE.
+     *  Ditto for RTEMS_MAXIMUM_NODES
      */
 
-    BSP_Multiprocessing.node = -1;
-
     if (BSP_Configuration.User_multiprocessing_table) {
-      if (BSP_Configuration.User_multiprocessing_table->node == -1) {
+        char *p;
-        home = getenv("HOME");
+ 
-        sprintf(buf, "%s/%s", home, "rtems_node");
+        /* make a copy for possible editing */
-        if ((stat(buf, &stat_buf)) == 0) {
-          fd = open(buf, O_RDONLY);
-          read(fd, node, 5);
-          close(fd);
-          unlink(buf);
         BSP_Multiprocessing = *BSP_Configuration.User_multiprocessing_table;
-          BSP_Multiprocessing.node = atoi(node);
         BSP_Configuration.User_multiprocessing_table = &BSP_Multiprocessing;
+ 
+        if (BSP_Multiprocessing.node == -1)
+        {
+            p = getenv("RTEMS_NODE");
+            BSP_Multiprocessing.node = p ? atoi(p) : 1;
         }
-        if (BSP_Configuration.User_multiprocessing_table->maximum_nodes == -1) {
+ 
-          home = getenv("HOME");
+        /* If needed provide maximum_nodes also */
-          sprintf(buf, "%s/%s", home, "rtems_max_node");
+        if (BSP_Multiprocessing.maximum_nodes == -1)
-          if ((stat(buf, &stat_buf)) == 0) {
+        {
-            fd = open(buf, O_RDONLY);
+            p = getenv("RTEMS_MAXIMUM_NODES");
-            read(fd, node, 5);
+            BSP_Multiprocessing.maximum_nodes = p ? atoi(p) : 1;
-            close(fd);
-            BSP_Multiprocessing.maximum_nodes = atoi(node);
-          }
-        }
         }
     }
 
@@ -239,9 +234,22 @@ bsp_start(void)
     else
         cpu_number = 0;
 
-    BSP_Configuration.work_space_start = (void *)MY_WORK_SPACE;
+    if (getenv("RTEMS_WORKSPACE_SIZE"))
-    if (BSP_Configuration.work_space_size)
+        BSP_Configuration.work_space_size = 
-        BSP_Configuration.work_space_size = WORKSPACE_SIZE;
+           strtol(getenv("RTEMS_WORKSPACE_SIZE"), 0, 0);
+    else
+        BSP_Configuration.work_space_size = DEFAULT_WORKSPACE_SIZE;
+ 
+    /*
+     * Allocate workspace memory, ensuring it is properly aligned
+     */
+ 
+    workspace_ptr = 
+      (unsigned32) sbrk(BSP_Configuration.work_space_size + CPU_ALIGNMENT);
+    workspace_ptr += CPU_ALIGNMENT - 1;
+    workspace_ptr &= ~(CPU_ALIGNMENT - 1);
+
+    BSP_Configuration.work_space_start = (void *) workspace_ptr;
  
     /*
      * Set up our hooks

c/src/lib/libbsp/unix/posix/startup/rtems-ctor.cc

@@ -49,6 +49,8 @@
  */
 
 #include <bsp.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 /*
  * RTEMS program name
@@ -103,6 +105,8 @@ extern "C" {
          * This allows our destructors to get run normally
          */
 
+        fflush( stdout );
+        fflush( stderr );
         return 0;
     }
 }

c/src/lib/libbsp/unix/posix/startup/setvec.c

@@ -37,7 +37,7 @@
  * We decide which based on the vector number
  */
 
-unix_isr_entry
+rtems_isr_entry
 set_vector(                                     /* returns old vector */
     rtems_isr_entry     handler,                /* isr routine        */
     rtems_vector_number vector,                 /* vector number      */
@@ -49,10 +49,10 @@ set_vector(                                     /* returns old vector */
 
     if ( type ) {
       rtems_interrupt_catch( handler, vector, &rtems_isr_ptr );
-      return (unix_isr_entry) rtems_isr_ptr;
+      return rtems_isr_ptr;
     } else {
       _CPU_ISR_install_vector( vector, (proc_ptr) handler, &raw_isr_ptr );
-      return (unix_isr_entry) raw_isr_ptr;
+      return raw_isr_ptr;
     }
    
 }