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+# ====================================================================
+#
+#      startup.cdl
+#
+#      C library startup related configuration data
+#
+# ====================================================================
+#####COPYRIGHTBEGIN####
+#                                                                          
+# -------------------------------------------                              
+# The contents of this file are subject to the Red Hat eCos Public License 
+# Version 1.1 (the "License"); you may not use this file except in         
+# compliance with the License.  You may obtain a copy of the License at    
+# http://www.redhat.com/                                                   
+#                                                                          
+# Software distributed under the License is distributed on an "AS IS"      
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+# License for the specific language governing rights and limitations under 
+# the License.                                                             
+#                                                                          
+# The Original Code is eCos - Embedded Configurable Operating System,      
+# released September 30, 1998.                                             
+#                                                                          
+# The Initial Developer of the Original Code is Red Hat.                   
+# Portions created by Red Hat are                                          
+# Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+# All Rights Reserved.                                                     
+# -------------------------------------------                              
+#                                                                          
+#####COPYRIGHTEND####
+# ====================================================================
+######DESCRIPTIONBEGIN####
+#
+# Author(s):      jskov
+# Original data:  jlarmour
+# Contributors:
+# Date:           1999-07-06
+#
+#####DESCRIPTIONEND####
+#
+# ====================================================================
+
+cdl_option CYGDAT_LIBC_ARGUMENTS {
+    display       "Arguments to main()"
+    flavor        data
+    default_value {"{\"\", NULL}"}
+    description   "
+        This option allows the setting of the arguments
+        to the main function. This only has any effect
+        when cyg_iso_c_start() is used to start the
+        ISO C compatibility. This will automatically
+        invoke main() in an ISO C compatible fashion.
+        This option is in fact used as argv, and so is
+        an n-tuple of string constants. The final
+        entry must be NULL. Conventionally if argv\[0\]
+        is supplied, it is used to inform the program
+        of its name."
+}
+
+cdl_component CYGSEM_LIBC_STARTUP_MAIN_THREAD {
+    display       "main() invoked as thread"
+    requires      CYGPKG_KERNEL
+    flavor        bool
+    default_value 1
+    description   "
+        It is normally expected (e.g. in a POSIX 1003.1
+        environment) that main() is run in the context
+        of a thread just like any other thread. If this
+        option is disabled then main() will instead be
+        called in the context of the initialization
+        routines, without the scheduler running and
+        using the interrupt stack. This means that 
+        any functions that may require interactions
+        with a running kernel will not work (including
+        libc functions, if configured to be thread safe
+        for example), so you should restrict yourself
+        to only calling fully re-entrant functions from
+        within main() in this case."
+
+    cdl_component CYGSEM_LIBC_MAIN_STACK_FROM_SYSTEM {
+        display        "System provides stack for main()'s thread"
+        description    "
+            This option controls whether the stack of
+            main()'s thread is provided by the application or
+            provided by the system. When disabled, the
+            application must declare a pointer variable
+            cyg_libc_main_stack which is a pointer to an
+            appropriately aligned region of memory. The
+            application must also declare a variable of
+            type `int' called cyg_libc_main_stack_size
+            which contains the size of the stack in bytes.
+            This must be a multiple of 8."
+        flavor         bool
+        default_value  1
+
+        cdl_option CYGNUM_LIBC_MAIN_DEFAULT_STACK_SIZE {
+            display        "main()'s default thread stack size"
+            flavor         data
+            legal_values   16 to 0x7fffffff
+            default_value  8192
+            description    "
+                With an eCos kernel, when the cyg_iso_c_start()
+                function is used to invoke the user-supplied
+                main() function in an ISO C compatible fashion,
+                a separate thread is created to call main().
+                This option controls the size of that thread's
+                stack, which is allocated in the BSS. It
+                must be a multiple of 8. Note, a low number
+                here may be overriden by the HAL if there is
+                a minimum requirement to process interrupts
+                etc."
+        }
+    }
+
+    cdl_option CYGNUM_LIBC_MAIN_THREAD_PRIORITY {
+        display         "Priority of main()'s thread"
+        description     "
+            This option is used to provide the thread
+            priority which main()'s thread runs at. Be
+            sure to check that this number is appropriate
+            for the kernel scheduler chosen. Different
+            kernel schedulers impose different restrictions
+            on the usable priorities."
+        flavor          data
+        legal_values    0 to 0x7fffffff
+        default_value   10
+   }
+}
+
+cdl_component CYGFUN_LIBC_ATEXIT {
+    display        "Include atexit() function"
+    flavor         bool
+    default_value  1
+    description    "
+        This option enables the use of the atexit()
+        function, and ensure that the atexit handlers
+        are invoked from within exit() as defined in
+        the ISO C standard."
+
+    cdl_option CYGNUM_LIBC_ATEXIT_HANDLERS {
+        display        "Number of functions atexit() supports"
+        flavor         data
+        legal_values   1 to 0x7fffffff
+        default_value  32
+        description    "
+            This option sets the number of functions
+            that atexit() has room for. In other words,
+            the number of separate atexit() calls that
+            can be made before calling exit() or returning
+            from main() ( in an environment controlled by
+            cyg_iso_c_start() ). For strict compliance
+            with the ISO C standard this should be at
+            least 32."
+    }
+}
+
+cdl_option CYGSEM_LIBC_EXIT_CALLS_FFLUSH {
+    display        "Make exit() call fflush()"
+    requires       CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO
+    default_value  1
+    description    "
+        This option will ensure that all output
+        streams are flushed when exitting using
+        exit() as prescribed by the ISO C standard."
+}
+
+cdl_option CYGSEM_LIBC_EXIT_STOPS_SYSTEM {
+    display        "_exit() stops all threads"
+    requires       CYGPKG_KERNEL
+    default_value  0
+    description    "
+        If this option is enabled then _exit(),
+        which is called from exit() which itself is
+        called on return from main(), stops the eCos
+        scheduler. For strict POSIX 1003.1
+        compatibility this would be the normal
+        behaviour. To allow the thread to simply
+        exit, without affecting other threads, simply
+        disable this option. If there is no eCos
+        scheduler, then _exit() simply loops
+        irrespective of the setting of this option."
+}
+
+cdl_component CYGPKG_LIBC_ENVIRONMENT {
+    display       "Provide a system environment"
+    flavor         bool
+    default_value  1
+    description   "
+        This option allows use of the getenv() function
+        and the global environment pointer
+        char **environ defined by POSIX 1003.1.
+        Disabling this saves a small amount of space."
+
+    cdl_option CYGDAT_LIBC_DEFAULT_ENVIRONMENT {
+        display       "Default environment"
+        flavor        data
+        default_value {"{ NULL }"}
+        description   "
+            This option allows the setting of the default
+            contents of the environment. This is in fact
+            the contents of the global environment pointer
+            char **environ defined by POSIX 1003.1. Strings
+            must be of the form NAME=VALUE, and the final
+            entry must be NULL."
+    }
+}
+
+cdl_option CYGSEM_LIBC_INVOKE_DEFAULT_STATIC_CONSTRUCTORS {
+    display        "Invoke default static constructors"
+    requires       CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
+    requires       CYGSEM_LIBC_STARTUP_MAIN_THREAD
+    default_value  0
+    description    "
+        This option causes the C library to call
+        static constructors with default priority
+        from within the context of the main() thread,
+        working with the co-operation of the HAL.
+        This may be needed for environments that
+        expect static constructors to be run in a
+        thread context. Note that this uses an object
+        with priority 65534. Therefore do not use
+        priority 65534 for any other static objects
+        with this option enabled."
+}