build-newlib

#!/bin/bash
set -e

NEWLIB_VERSION=newlib-4.2.0.20211231
JOBS=$(nproc --all)
OUT_DIR_NOPIC=$PWD/no-pic
OUT_DIR_PIC=$PWD/pic

mkdir -p $OUT_DIR_NOPIC
mkdir -p $OUT_DIR_PIC

NEWLIB_FLAGS="--disable-newlib-supplied-syscalls \
	--disable-nls \
	--enable-newlib-reent-small \
	--disable-newlib-fvwrite-in-streamio \
	--disable-newlib-fseek-optimization \
	--disable-newlib-wide-orient \
	--enable-newlib-nano-malloc \
	--disable-newlib-unbuf-stream-opt \
	--enable-lite-exit \
	--enable-newlib-global-atexit \
	--enable-newlib-nano-formatted-io"

mkdir -p build
cd build

wget -nc ftp://sourceware.org/pub/newlib/$NEWLIB_VERSION.tar.gz
tar --skip-old-files -xaf $NEWLIB_VERSION.tar.gz
cd $NEWLIB_VERSION

mkdir -p build
cd build
../configure --target=arm-none-eabi \
    $NEWLIB_FLAGS \
    CFLAGS_FOR_TARGET="-g -Os -ffunction-sections -fdata-sections -fshort-wchar"

make -j $JOBS

cp arm-none-eabi/thumb/v7e-m+dp/hard/newlib/libc.a $OUT_DIR_NOPIC/libc_nano.a
cp arm-none-eabi/thumb/v7e-m+dp/hard/newlib/libg.a $OUT_DIR_NOPIC/libg_nano.a
cp arm-none-eabi/thumb/v7e-m+dp/hard/newlib/libm.a $OUT_DIR_NOPIC/
cp arm-none-eabi/thumb/v7e-m+dp/hard/libgloss/libnosys/libnosys.a $OUT_DIR_NOPIC

cd ..

# PIC
mkdir -p build-pic
cd build-pic
../configure --target=arm-none-eabi \
    $NEWLIB_FLAGS \
    CFLAGS_FOR_TARGET="-g -Os -ffunction-sections -fdata-sections -fshort-wchar -fPIC -mno-pic-data-is-text-relative -mno-single-pic-base"

make -j $JOBS

cp arm-none-eabi/thumb/v7e-m+dp/hard/newlib/libc.a $OUT_DIR_PIC/libc_nano.a
cp arm-none-eabi/thumb/v7e-m+dp/hard/newlib/libg.a $OUT_DIR_PIC/libg_nano.a
cp arm-none-eabi/thumb/v7e-m+dp/hard/newlib/libm.a $OUT_DIR_PIC/
cp arm-none-eabi/thumb/v7e-m+dp/hard/libgloss/libnosys/libnosys.a $OUT_DIR_PIC