tce-load -i compiletc libjpeg-turbo-dev gnutls3.6-dev bash

https://github.com/qpdf/qpdf/releases/download/release-qpdf-9.1.0/qpdf-9.1.0.tar.gz

cd qpdf-9.1.0

CC="gcc -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe" ./configure --prefix=/usr/local --localstatedir=/var --disable-static

[-fno-exceptions -fno-rtti fails]

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

make [2m 14.57s]
sudo make install