tce-load -i compiletc protobuf-dev

wget https://github.com/protobuf-c/protobuf-c/releases/download/v1.5.2/protobuf-c-1.5.2.tar.gz
wget https://www.linuxfromscratch.org/patches/blfs/svn/protobuf-c-1.5.2-protobuf34_fix-1.patch

cd protobuf-c-1.5.2

patch -Np1 -i ../protobuf-c-1.5.2-protobuf34_fix-1.patch

CC="gcc -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" CXX="g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --localstatedir=/var --disable-static

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;

make [2m 20.94s]
sudo make install

    protobuf-c 1.5.2

        CC:                     gcc -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe
        CFLAGS:                 -g -O2
        CXX:                    g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -fno-exceptions -fno-rtti -std=c++17
        CXXFLAGS:               -g -O2
        LDFLAGS:                
        LIBS:                   

        prefix:                 /usr/local
        sysconfdir:             ${prefix}/etc
        libdir:                 ${exec_prefix}/lib
        includedir:             ${prefix}/include
        pkgconfigdir:           ${libdir}/pkgconfig

        bigendian:              no
        protobuf version:       libprotoc 34.1