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+# ====================================================================
+#
+#      stdio.cdl
+#
+#      C library stdio 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 CYGIMP_LIBC_STDIO_INLINES {
+    display       "Inline versions of <stdio.h> functions"
+    default_value 1
+    description   "
+        This option chooses whether some of the
+        particularly simple functions from
+        <stdio.h> are available as inline
+        functions. This may improve performance, and as
+        the functions are small, may even improve code
+        size."
+}
+
+cdl_option FOPEN_MAX {
+    display       "Permitted number of open files"
+    flavor        data
+    legal_values  3 to 0x7fffffff
+    default_value 8
+    description   "
+        This option controls the guaranteed minimum
+        number of simultaneously open files. The ISO
+        C standard requires it to be defined (para
+        7.9.1), and if strictly compliant, it must be
+        at least 8 (para 7.9.3). In practice it can be
+        as low as 3 - for stdin, stdout and stderr."
+}
+
+cdl_option FILENAME_MAX {
+    display       "Maximum length of filename"
+    flavor        data
+    legal_values  1 to 0x7fffffff
+    default_value 16
+    description   "
+        This option defines the maximum allowed size of
+        a filename in characters. The ISO C standard
+        requires it to be defined (para 7.9.1)."
+}
+
+cdl_option L_tmpnam {
+    display       "Maximum length of filenames for temporary files"
+    flavor        data
+    legal_values  1 to 0x7fffffff
+    default_value 16
+    description   "
+        This option defines the maximum allowed size of
+        filenames for temporary files as generated by
+        tmpnam(). It is measured in characters, and the
+        ISO C standard requires it to be defined (para 
+        7.9.1)."
+}
+
+cdl_option TMP_MAX {
+    display       "Unique file names generated by tmpnam()"
+    flavor        data
+    legal_values  0 to 0x7fffffff
+    default_value 0
+    description   "
+        This option defines the minimum number of
+        unique file names generated by tmpnam(). The
+        ISO C standard requires it to be defined (para
+        7.9.1)."
+}
+
+cdl_component CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO {
+    display       "Buffered I/O"
+    flavor        bool
+    default_value 1 
+    description   "
+        This option controls whether input/output
+        through the <stdio.h> functions is buffered.
+        This may save some memory per file. It
+        is equivalent to putting every file into
+        non-buffered mode (_IONBF) through setvbuf(),
+        except now it can never be altered back to
+        buffered mode. Disabling buffering is strictly 
+        non-compliant with the ISO C standard."
+
+    cdl_option CYGNUM_LIBC_STDIO_BUFSIZE {
+        display        "Default buffer size"
+        flavor         data
+        legal_values   1 to 0x7fffffff
+        default_value  256
+        description    "
+            This option defines the default size of buffer
+            used with calls to setbuf(), and is the default
+            size for buffered streams that have not had
+            either setbuf() or setvbuf() invoked on them.
+            It is exactly equivalent to the standard
+            constant BUFSIZ, except that it is 0 if
+            CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO is disabled.
+            The ISO C standard requires this to be defined
+            (para 7.9.1), and says it must be at least 256
+            (para 7.9.2)."
+    }
+    
+    cdl_option CYGSEM_LIBC_STDIO_DYNAMIC_SETVBUF {
+        display       "setbuf()/setvbuf() uses malloc()"
+        requires      CYGPKG_LIBC_MALLOC
+        default_value 0
+        description   "
+            This option controls whether I/O buffers are
+            implemented dynamically within the stdio
+            implementation. Otherwise they will be static,
+            and cannot be changed by setbuf()/setvbuf(). If
+            they are static (i.e. this option is disabled),
+            any attempt to use an arbitrary buffer size, or
+            to pass a user-supplied buffer to setbuf() or
+            setvbuf() will fail - the buffer is implemented
+            internally as a static array of taking the size
+            of the configuration option BUFSIZ. The only
+            exception is if a user buffer is not supplied,
+            and the buffer size requested is less than
+            BUFSIZ. In this case, the buffer will
+            be configured to only use that amount of
+            buffering. However the unused memory left over
+            will NOT be freed. If this option is enabled,
+            then CYGPKG_LIBC_MALLOC must also
+            be enabled. Either setting can be considered to
+            be compliant with the ISO C standard."
+    }
+}
+# Define BUFSIZ with same value as ..._BUFSIZE or 0
+cdl_option BUFSIZ {
+    display       "Default buffer size (BUFSIZ)"
+    flavor        data
+    calculated    CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO \
+                   ? "CYGNUM_LIBC_STDIO_BUFSIZE" : 0
+}
+
+cdl_option CYGFUN_LIBC_STDIO_ungetc {
+    display       "Support for ungetc()"
+    default_value   1
+    description   "
+        This option controls whether ungetc() is
+        supported. If not, then some space can be
+        saved, and speed is improved. Note that you
+        MUST have this defined if you want to use the
+        scanf() family of functions."
+}
+
+cdl_option CYGPKG_LIBC_STDIO_OPEN {
+    display       "Dynamic opening/closing of files"
+    requires      CYGPKG_LIBC_MALLOC
+    default_value 1
+    description   "
+        fopen() and fclose() use dynamic memory
+        allocation routines to allocate memory for
+        new FILE structure pointers. This option,
+        along with CYGPKG_LIBC_MALLOC, should be
+        enabled to use
+        fopen() and fclose(). If disabled, only the
+        default console streams - stdin, stdout and
+        stderr - will be available."
+}
+
+cdl_option CYGDAT_LIBC_STDIO_DEFAULT_CONSOLE {
+    display       "Default console device"
+    flavor        data
+    default_value {"\"/dev/ttydiag\""}
+    description   "
+        This option allows you to choose the
+        default console device. In the current
+        implementation, all these devices begin
+        with the prefix /dev/ and are followed by
+        the name of a device. The name of the device
+        depends on the device drivers you have
+        configured in your system. For example,
+        /dev/ttydiag could be the HAL diagnostic output
+        pseudo-device, or /dev/tty0 could be your
+        first serial driver, depending on your
+        configuration."
+}
+
+cdl_component CYGPKG_LIBC_STDIO_FLOATING_POINT {
+    display       "Floating point support"
+    flavor        none
+    description   "
+        This component allows floating point support
+        to be enabled in certain standard I/O
+        functions."
+
+    cdl_option CYGSEM_LIBC_STDIO_PRINTF_FLOATING_POINT {
+        display       "printf() family"
+        requires      CYGPKG_LIBM
+        default_value 1
+        description   "
+            This option enables the use of floating point
+            number output in the printf() family (i.e.
+            printf(), sprintf(), vprintf(), etc.) of
+            functions. A substantial amount of code space
+            can be saved if this option is disabled. If it
+            is disabled then floating point specifiers
+            (%e, %f, %g) are ignored, and nothing is
+            output."
+    }
+
+    cdl_option CYGSEM_LIBC_STDIO_SCANF_FLOATING_POINT {
+        display       "scanf() family"
+        requires      CYGPKG_LIBM
+        requires      CYGFUN_LIBC_strtod
+        default_value 1
+        description   "
+            This option enables the use of floating point
+            number conversion in the scanf() family (i.e.
+            scanf(), sscanf(), vscanf(), etc.) of
+            functions. A substantial amount of code space
+            can be saved if this option is disabled. If it
+            is disabled then floating point specifiers
+            (%e, %f, %g) are ignored, and nothing is
+            converted."
+    }
+}
+
+cdl_option CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS {
+    display       "Thread safe I/O streams"
+    requires      CYGPKG_KERNEL
+    default_value 1
+    description   "
+        This option controls whether standard I/O streams
+        are thread-safe. Having this option set allows
+        the streams to be locked when accessed by
+        multiple threads simultaneously."
+}