diff -N -r -u -b boost_1_34_0/tools/jam/src/execamiga.c boost_1_34_0_amiga/tools/jam/src/execamiga.c
--- boost_1_34_0/tools/jam/src/execamiga.c	2114-02-06 23:28:16 
+++ boost_1_34_0_amiga/tools/jam/src/execamiga.c	2007-06-02 08:16:12 
@@ -0,0 +1,204 @@
+/* 
+ * This file is part of Jam - see jam.c for Copyright information.
+ */
+
+#include "jam.h"
+
+#if defined(OS_AMIGA)
+
+#include "lists.h"
+#include "execcmd.h"
+#include "patchlevel.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+#include <proto/exec.h>
+#include <proto/dos.h>
+
+#include <utility/hooks.h>
+#include <dos/dos.h>
+#include <dos/var.h>
+
+#define MAX_ENV_SIZE 1024  /* maximum number of environ entries */
+
+
+/* clib2 specific controls */
+int __minimum_os_lib_version = 52;
+char * __minimum_os_lib_error = "Requires AmigaOS 4.0";
+BOOL __open_locale = FALSE;
+BOOL __disable_dos_requesters = TRUE;
+
+
+static const char* version __attribute__((used)) =
+  "$VER: bjam "VERSION"-1 (2.6.2007)";  /* dd.mm.yyyy */
+
+
+/*
+ * execamiga.c - execute a shell script
+ *
+ * Uses the abc-shell to execute all commands synchronously.
+ */
+void execcmd
+(
+  char *string,
+  void (*func)(void *closure, int status, timing_info*),
+  void *closure,
+  LIST *shell
+)
+{
+    timing_info time = {0, 0};
+
+    static char tmpbuf[128];
+    tmpbuf[0] = '\0';
+    strlcpy(tmpbuf, "/t/bjamXXXXXX", sizeof(tmpbuf));
+
+    int fd = mkstemp(tmpbuf);
+    if ( fd == -1 )
+    {
+        printf("can't open command file\n");
+        (*func)(closure, EXEC_CMD_FAIL, &time);
+        return;
+    }
+
+    int len = strlen(string);
+    if ( write(fd, string, len) != len )
+    {
+        printf("can't write command file\n");
+        (*func)(closure, EXEC_CMD_FAIL, &time);
+        unlink(tmpbuf);
+        close(fd);
+        return;
+    }
+
+    static char cmdbuf[128];
+    cmdbuf[0] = '\0';
+    snprintf(cmdbuf, sizeof(cmdbuf), "/sdk/c/sh %s", tmpbuf);
+
+    if ( DEBUG_EXECCMD )
+    {
+        printf("string = '%s'\n", string);
+        printf("cmdbuf = '%s'\n", cmdbuf);
+    }
+
+    int status = system(cmdbuf);
+
+    unlink(tmpbuf);
+    close(fd);
+
+    if ( status == 0 )
+    {
+        (*func)(closure, EXEC_CMD_OK, &time);
+    }
+    else
+    {
+        (*func)(closure, EXEC_CMD_FAIL, &time);
+    }
+}
+
+
+int execwait()
+{
+    return 0;
+}
+
+
+/*
+ * environ - AmigaOS environment support
+ *
+ * The following code implements environ support for AmigaOS.
+ */
+void make_environ() __attribute__((constructor));
+void free_environ() __attribute__((destructor));
+
+char **environ = NULL;
+
+
+int is_ascii_string(char* str)
+{
+  while ( *str != '\0' )
+  {
+    if ( !isascii(*str) )
+    {
+      return 0;
+    }
+
+    ++str;
+  }
+
+  return 1;
+}
+
+
+uint32 copy_env(struct Hook *hook, APTR data, struct ScanVarsMsg *msg)
+{
+    static uint32 env_size = 1;  /* environ is null terminated */
+
+    if ( env_size == MAX_ENV_SIZE )
+    {
+        return 0;
+    }
+
+    if ( msg->sv_Name == 0 ||
+         msg->sv_Var == 0 ||
+         strlen(msg->sv_GDir) > 4 ||  /* excludes ENVARC: sub-directories */
+         !is_ascii_string(msg->sv_Name) ||
+         !is_ascii_string(msg->sv_Var) ||
+         strstr(msg->sv_Name, ".prefs") != 0 ||
+         strstr(msg->sv_Name, ".xml") != 0 ||
+         strstr(msg->sv_Name, ".cfg") != 0 )
+
+    {
+        return 0;
+    }
+
+    uint32 var_size = strlen(msg->sv_Name) + 1 + msg->sv_VarLen + 1;
+    char* var_buf = malloc(var_size);
+    if ( var_buf == 0 )
+    {
+        return 0;
+    }
+
+    snprintf(var_buf, var_size, "%s=%s", msg->sv_Name, msg->sv_Var);
+
+    char **env = hook->h_Data;
+    env[env_size - 1] = var_buf;
+    ++env_size;
+
+    return 0;
+}
+
+
+void make_environ() 
+{
+    size_t environ_size = MAX_ENV_SIZE * sizeof(char*);
+
+    environ = (char**)malloc(environ_size);
+    if ( environ == 0 )
+    {
+        return;
+    }
+
+    memset(environ, 0, environ_size);
+
+    struct Hook hook;
+    memset(&hook, 0, sizeof(struct Hook));
+    hook.h_Entry = copy_env;
+    hook.h_Data = environ;
+    (void) IDOS->ScanVars(&hook, 0, 0);
+}
+
+
+void free_environ()
+{
+    char **i;
+    for ( i = environ; *i != 0; ++i )
+    {
+        free(*i);
+    }
+
+    free(environ);
+}
+
+
+#endif