From 608d40fde0c7e7e72a0acf4f262bf76c16443be0 Mon Sep 17 00:00:00 2001 From: Dimitar Dimitrov Date: Thu, 1 Feb 2024 19:19:54 +0200 Subject: [PATCH] pru: Document how -mmcu option uses MCU specs The plan to maintain PRU hardware-specific specs in newlib tree has been abandoned in favour of a new distinct GIT project. Update the documentation accordingly. gcc/ChangeLog: * doc/invoke.texi (-mmcu): Add information about MCU specs. Signed-off-by: Dimitar Dimitrov --- gcc/doc/invoke.texi | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 69020245b25..d75b28484bb 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -30106,8 +30106,14 @@ This is already the norm for most firmware projects. @opindex mmcu @item -mmcu=@var{mcu} -Specify the PRU MCU variant to use. Check Newlib for the exact list of -supported MCUs. +Specify the PRU hardware variant to use. A correspondingly named +spec file would be loaded, passing the memory region sizes to +the linker and defining hardware-specific C macros. + +Newlib provides only the @code{sim} spec, intended for running +regression tests using a simulator. Specs for real hardware can be +obtained by installing the +@w{@uref{https://github.com/dinuxbg/gnuprumcu/,GnuPruMcu}} package. @opindex mno-relax @item -mno-relax