Beta 56 update

[IanSB]

This should bring your branch up to date with my fork for the Beta 56 release

[IanSB]

I'm trying to update to the current compiler version:
arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi.tar.xz

I've made a few fixes and it now compiles and runs with that but there are several warnings at the end:

/mnt/c/linux/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/bin/ld: /mnt/c/linux/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/lib/arm/v5te/hard/libc_nano.a(libc_a-signalr.o): in function `_getpid_r':
signalr.c:(.text._getpid_r+0x0): warning: _getpid is not implemented and will always fail
/mnt/c/linux/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/bin/ld: /mnt/c/linux/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/lib/arm/v5te/hard/libc_nano.a(libc_a-signalr.o): in function `_kill_r':
signalr.c:(.text._kill_r+0x1c): warning: _kill is not implemented and will always fail
/mnt/c/linux/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/bin/ld: /mnt/c/linux/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/lib/arm/v5te/hard/libc_nano.a(libc_a-openr.o): in function `_open_r':
openr.c:(.text._open_r+0x20): warning: _open is not implemented and will always fail
/mnt/c/linux/arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi/bin/../lib/gcc/arm-none-eabi/12.2.1/../../../../arm-none-eabi/bin/ld: warning: rgb-to-hdmi has a LOAD segment with RWX permissions

Any idea how to suppress these warnings?