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authorAlastair D'Silva <alastair@d-silva.org>2016-12-23 01:02:42 (GMT)
committerAlastair D'Silva <alastair@d-silva.org>2017-01-09 22:47:35 (GMT)
commit2ac39621bcb8fa205029591d3e6c67d66080e001 (patch)
tree0b6cd7b08c9a55cc9bd7c43c9966379d481947c9
parenta2d49174dffdb9e33aa6cb53da16d84824fd4ed6 (diff)
Add more newlib options
-rw-r--r--config/libc/newlib.in.295
-rw-r--r--scripts/build/libc/newlib.sh49
2 files changed, 127 insertions, 17 deletions
diff --git a/config/libc/newlib.in.2 b/config/libc/newlib.in.2
index 48e5503..64630b0 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"
@@ -35,13 +70,71 @@ 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_NANO_MALLOC
diff --git a/scripts/build/libc/newlib.sh b/scripts/build/libc/newlib.sh
index 6ae579b..442b92c 100644
--- a/scripts/build/libc/newlib.sh
+++ b/scripts/build/libc/newlib.sh
@@ -66,16 +66,6 @@ do_libc() {
extra_config+=("--disable-multilib")
fi
- if [ "${CT_LIBC_NEWLIB_IO_C99FMT}" = "y" ]; then
- newlib_opts+=( "--enable-newlib-io-c99-formats" )
- else
- newlib_opts+=( "--disable-newlib-io-c99-formats" )
- fi
- if [ "${CT_LIBC_NEWLIB_IO_LL}" = "y" ]; then
- newlib_opts+=( "--enable-newlib-io-long-long" )
- else
- newlib_opts+=( "--disable-newlib-io-long-long" )
- fi
if [ "${CT_LIBC_NEWLIB_IO_FLOAT}" = "y" ]; then
newlib_opts+=( "--enable-newlib-io-float" )
if [ "${CT_LIBC_NEWLIB_IO_LDBL}" = "y" ]; then
@@ -87,17 +77,44 @@ do_libc() {
newlib_opts+=( "--disable-newlib-io-float" )
newlib_opts+=( "--disable-newlib-io-long-double" )
fi
+
if [ "${CT_LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS}" = "y" ]; then
newlib_opts+=( "--disable-newlib-supplied-syscalls" )
else
newlib_opts+=( "--enable-newlib-supplied-syscalls" )
fi
- if [ "${CT_LIBC_NEWLIB_NANO_MALLOC}" = "y" ]; then
- newlib_opts+=( "--enable-newlib-nano-malloc" )
- fi
- if [ "${CT_LIBC_NEWLIB_NANO_FORMATTED_IO}" = "y" ]; then
- newlib_opts+=( "--enable-newlib-nano-formatted-io" )
- fi
+
+ yn_args="IO_POS_ARGS:newlib-io-pos-args
+IO_C99FMT:newlib-io-c99-formats
+IO_LL:newlib-io-long-long
+NEWLIB_REGISTER_FINI:newlib-register-fini
+NANO_MALLOC:newlib-nano-malloc
+NANO_FORMATTED_IO:newlib-nano-formatted-io
+ATEXIT_DYNAMIC_ALLOC:atexit-dynamic-alloc
+GLOBAL_ATEXIT:newlib-global-atexit
+LITE_EXIT:lite-exit
+REENT_SMALL:reent-small
+MULTITHREAD:multithread
+WIDE_ORIENT:newlib-wide-orient
+UNBUF_STREAM_OPT:unbuf-stream-opt
+ENABLE_TARGET_OPTSPACE:target-optspace
+ "
+
+ for ynarg in $yn_args; do
+ var="CT_LIBC_NEWLIB_${ynarg%:*}"
+ eval var=\$${var}
+ argument=${ynarg#*:}
+
+
+ if [ "${var}" = "y" ]; then
+ newlib_opts+=( "--enable-$argument" )
+ else
+ newlib_opts+=( "--disable-$argument" )
+ fi
+ done
+
+ [ "${CT_LIBC_NEWLIB_EXTRA_SECTIONS}" = "y" ] && \
+ CT_LIBC_NEWLIB_TARGET_CFLAGS="${CT_LIBC_NEWLIB_TARGET_CFLAGS} -ffunction-sections -fdata-sections"
[ "${CT_LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE}" = "y" ] && newlib_opts+=("--enable-target-optspace")