Merge pull request #519 from InfernoEmbedded/newlib-enhancements

Newlib enhancements

1 files changed, 103 insertions, 1 deletions

diff --git a/config/libc/newlib.in.2 b/config/libc/newlib.in.2
index 48e5503f..927cce89 100644
--- a/config/libc/newlib.in.2
+++ b/config/libc/newlib.in.2
@@ -26,6 +26,41 @@ config LIBC_NEWLIB_IO_LDBL
     help
       Enable support for IOs on long doubles.
 
+config LIBC_NEWLIB_IO_POS_ARGS
+    bool
+    prompt "Enable printf-family positional arg support"
+    help
+        Enable printf-family positional arg support.
+
+config LIBC_NEWLIB_FVWRITE_IN_STREAMIO
+    bool
+    prompt "Vector buffer mechanism to support stream IO buffering"
+    default y
+    help
+        NEWLIB implements the vector buffer mechanism to support stream IO
+        buffering required by C standard.  This feature is possibly
+        unnecessary for embedded systems which won't change file buffering
+        with functions like `setbuf' or `setvbuf'.  The buffering mechanism
+        still acts as default for STDIN/STDOUT/STDERR even if this option
+        is specified.
+
+config LIBC_NEWLIB_UNBUF_STREAM_OPT
+    bool
+    prompt "Optimize fprintf to unbuffered unix file"
+    default y
+    help
+        NEWLIB does optimization when `fprintf to write only unbuffered unix
+        file'.  It creates a temorary buffer to do the optimization that
+        increases stack consumption by about `BUFSIZ' bytes. Disabling this option
+        disables the optimization and saves size of text and stack.
+
+config LIBC_NEWLIB_FSEEK_OPTIMIZATION
+    bool
+    prompt "Fseek optimisation"
+    default y
+    help
+        Disabling fseek optimisation can decrease code size.
+
 config LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS
     bool
     prompt "Disable the syscalls supplied with newlib"
@@ -35,15 +70,82 @@ config LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS
       _write... If you plan to port newlib to a new
       platform/board, say Yes.
 
+config LIBC_NEWLIB_REGISTER_FINI
+    bool
+    prompt "Enable finalization function registration using atexit"
+    help
+        Enable finalization function registration using atexit.
+
+config LIBC_NEWLIB_ATEXIT_DYNAMIC_ALLOC
+    bool
+    prompt "Enable dynamic allocation of atexit entries"
+    default y
+    help
+        Enable dynamic allocation of atexit entries.
+
+config LIBC_NEWLIB_GLOBAL_ATEXIT
+    bool
+    prompt "Enable atexit data structure as global variable"
+    help
+        Enable atexit data structure as global variable.  By doing so it is
+        move out of _reent structure, and can be garbage collected if atexit
+        is not referenced.
+
+config LIBC_NEWLIB_LITE_EXIT
+    bool
+    prompt "Enable lite exit"
+    help
+        Enable lite exit, a size-reduced implementation of exit that doesn't
+        invoke clean-up functions such as _fini or global destructors.
+
+config LIBC_NEWLIB_REENT_SMALL
+    bool
+    prompt "Enable small reentrant struct support"
+    help
+        Enable small reentrant struct support.
+
+config LIBC_NEWLIB_MULTITHREAD
+    bool
+    prompt "Enable support for multiple threads"
+    default y
+    help
+        Enable support for multiple threads.
+
+config LIBC_NEWLIB_EXTRA_SECTIONS
+    bool
+    prompt "Place each function & data element in their own section"
+    help
+        Place each function & data symbol in their own section. This allows
+        the linker to garbage collect unused symbols at link time.
+
+config LIBC_NEWLIB_WIDE_ORIENT
+    bool
+    prompt "Allow wide C99 stream orientation"
+    default y
+    help
+        C99 states that each stream has an orientation, wide or byte.  This
+        feature is possibly unnecessary for embedded systems which only do
+        byte input/output operations on stream. Disabling this feature can
+        decrease code size.
+
 config LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE
     bool
     prompt "Optimize newlib for size"
     default y
     help
       Pass --enable-target-optspace to newlib configure.
-      
+
       This will compile newlib with -Os.
 
+config LIBC_NEWLIB_LTO
+    bool
+    prompt "Enable Link Time Optimization"
+    help
+      Builds the libraries with -flto to enable more aggressive link time
+      optimization. You will need to add -flto-partition=one to your
+      application's link line to keep the RETURN assembler macro together
+      with it's consumers.
+
 config LIBC_NEWLIB_NANO_MALLOC
     bool
     prompt "Enable Nano Malloc"