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Manually building gcc mips-elf-gcc:

Problem: requires: mips-elf-gcc

• but there is one in: https://aur.archlinux.org/packages/mips-elf-gcc
• trying modified build from PKBUILD:
• be sure that you have powerfull machine

sudo apt-get install autoconf automake libtool gcc binutils make tmux git \
  g++ libgmp-dev libmpc-dev libmpfr-dev
mkdir ~/gcc
cd ~/gcc
git clone https://aur.archlinux.org/mips-elf-gcc.git
# we will use build instructions from this:
cat mips-elf-gcc/PKGBUILD

cd ~/gcc
pkgver=12.2.0
curl -fLO https://ftp.gnu.org/gnu/gcc/gcc-$pkgver/gcc-$pkgver.tar.xz
# you need big and fast disk for build

sudo mkdir /mnt/gcc
sudo chown `id -un`:`id -gn` /mnt/gcc
tar xf gcc-$pkgver.tar.xz -C /mnt/gcc
_target=mips-elf
cd /mnt/gcc/gcc-$pkgver

Created build-script /mnt/gcc/build_me.sh with contents:

#!/bin/bash
set -euo pipefail
set -x

pkgver=12.2.0
_target=mips-elf
prefix=/opt/gcc-$pkgver

cd `dirname $0`
cd gcc-$pkgver
./configure \
	--target=$_target \
	--prefix=$prefix \
	--with-sysroot=$prefix/$_target \
	--enable-languages=c,c++ \
	--enable-plugins \
	--disable-nls \
	--disable-threads \
	--disable-multilib \
	--disable-shared \
	--with-gnu-as \
	--with-gnu-ld

make all-gcc -j`nproc` "inhibit_libc=true"
sudo make install-gcc
exit 0

After run there should exist:

• /opt/gcc-12.2.0/bin/mips-elf-gcc

To build pic32mx version again try:

cd ~/nuttxspace/pic32mx/nuttx
export PATH=/opt/gcc-12.2.0/bin:$PATH
make

CC:  clock/clock.c as: unrecognized option '-EL'
make[1]: *** [Makefile:61: clock.o] Error 2

# you can append V=1 to see real commands:
make V=1

mips-elf-gcc -c -fno-common -Wall -Wstrict-prototypes -Wshadow -Wundef -Wno-attributes -Wno-unknown-pragmas -O2 -fno-strict-aliasing -fomit-frame-pointer -ffunction-sections -fdata-sections -mlong32 -membedded-data -msoft-float -march=m4k  -EL -isystem /home/azureuser/nuttxspace/pic32mx/nuttx/include -D__NuttX__ -DNDEBUG -D__KERNEL__  -pipe -I /home/azureuser/nuttxspace/pic32mx/nuttx/sched    clock/clock.c -o  clock.o

Using binaries from sourceforge

Trying:

mkdir -p ~/gcc
cd ~/gcc
curl -fLOJ https://sourceforge.net/projects/pinguinoide/files/linux/pinguino-linux64-gcc-mips-elf.tar.lzma/download
tar xf pinguino-linux64-gcc-mips-elf.tar.lzma
sudo rm -rf /opt/p32
sudo mv p32 /opt
sudo chown -R root:root /opt/p32
sudo ln -s /opt/p32/bin/mips-elf-cc /opt/p32/bin/mips-elf-gcc

...

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