From 2ac39621bcb8fa205029591d3e6c67d66080e001 Mon Sep 17 00:00:00 2001 From: Alastair D'Silva Date: Fri, 23 Dec 2016 12:02:42 +1100 Subject: Add more newlib options 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") -- cgit v0.10.2-6-g49f6