Compiled on RPI4B-4G with 5.10.77-piCore-v8

Compile Flags:
CFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto -fuse-linker-plugin -fno-exceptions'
CXXFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto -fuse-linker-plugin -fno-exceptions -fno-rtti'
LDFLAGS='-Wl,-O1'
export CFLAGS CXXFLAGS LDFLAGS

Dependencies:
compiletc
llvm-bin

Commands:

tar -xf nspr-4.33.tar.gz

cd nspr-4.33/nspr/

## NOTE: run the commands below before configuring can get rid of these files: prerr.properties, compile-et.pl, lib*.a
## sed -ri 's#^(RELEASE_BINS =).*#\1#' pr/src/misc/Makefile.in
## sed -i 's#$(LIBRARY) ##'            config/rules.mk
## EXPLANATION:
## prerr.properties - is a java jar file
## compile-et.pl - is a perl script (shebang needs adjustment)
## lib*.a - static libraries
## all above belongs to nspr-dev, they are only used in really rare occations
## they don't affect the rest of the files, so you can remove them later if you don't want them
## the impact to compile time is neglectable

./configure --prefix=/usr/local --localstatedir=/var --with-mozilla --with-pthreads

time make -j4
real    0m 32.37s
user    0m 41.12s
sys     0m 7.00s

DESTDIR=/tmp/packing-nspr make install

mkdir -p /tmp/packing-nspr-dev/usr/local/lib

cd /tmp

mv packing-nspr/usr/local/include/ packing-nspr-dev/usr/local/
mv packing-nspr/usr/local/lib/*a packing-nspr-dev/usr/local/lib/
mv packing-nspr/usr/local/lib/pkgconfig/ packing-nspr-dev/usr/local/lib/
sed -i '1 s:.*:#!/usr/local/bin/perl:' packing-nspr/usr/local/bin/compile-et.pl
mv packing-nspr/usr/local/bin packing-nspr-dev/usr/local/
mv packing-nspr/usr/local/share packing-nspr-dev/usr/local/

strip --strip-unneeded packing-nspr/usr/local/lib/*so
llvm-strip --strip-debug packing-nspr-dev/usr/local/lib/*.a