This folder contains Newlib headers and static libraries built for arm64 with the Darwin ABI. This provides the runtime standard library for PongoOS.
The current build is based on Newlib 3.3.0 and requires a custom patch to work with Apple's toolchain / the Darwin ABI.
It can be built as follows (where /path/to/PongoOS should be replaced with the path to this repository):
curl -O -J ftp://sourceware.org/pub/newlib/newlib-3.3.0.tar.gz
tar -xf newlib-3.3.0.tar.gz
cd newlib-3.3.0/newlib
git apply /path/to/PongoOS/aarch64-none-darwin/darwin.patch
./configure --prefix=/tmp/build --host=aarch64-none-darwin --enable-newlib-io-c99-formats --enable-newlib-io-long-long --disable-newlib-io-float --disable-newlib-supplied-syscalls --disable-shared --enable-static CC='xcrun -sdk iphoneos clang' CFLAGS='-arch arm64 -Wall -O3 -nostdlib -nostdlibinc -fno-blocks -U__nonnull' LDFLAGS='-Wl,-preload,-e,_main'
make
make install
The headers and static libraries will be placed in /tmp/build/aarch64-none-darwin. If you'd like to use them with PongoOS, simply move them from there to this directory.