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alire-project / GNAT-FSF-builds

Builds of the GNAT Ada compiler from FSF GCC releases
MIT License
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Add picolibc [RISC-V/AVR?/ARM?] #46

Closed Irvise closed 1 year ago

Irvise commented 1 year ago

I am opening this issue just to track the potential use of picolibc in the RISC-V toolchain and potentially AVR too.

Afaik, the riscv64 toolchain has no libc included. AVR has avr-libc. I do not know the state of arm (32bit). Picolibc is designed to add a basic libc system for deeply embedded targets and RTOSes. It is also updated frequently and adds some advance functionality, such as initial support for long double. Some toolchains already use picolibc instead of newlibc such as Litex.

Picolibc is built from avr-libc and newlibc, so we could potentially deprecate newlibc.

Once again, this is just to help me keep track of this idea. I am currently not asking it to be added to the builds.

Regards, Fer

Fabien-Chouteau commented 1 year ago

arm-elf and riscv64-elf both come with newlib and as you said there's avr-libc for avr-elf so we are all covered in terms of libc.

We are not looking to switch to different libc at the moment because 1) it's extra work for no clear benefits, 2) it would differentiate this build from other GNAT builds .