tce-load -wi compiletc glu-dev Xorg-7.7-lib-dev libjpeg-turbo-dev openjpeg-dev

https://www.mupdf.com/downloads/archive/mupdf-1.23.3-source.tar.gz
https://www.linuxfromscratch.org/blfs/view/svn/pst/mupdf.html

cd mupdf-1.23.3-source

-> Add this to top of ./include/mupdf/fitz/config.h to disable non-essential fonts:
#define TOFU
#define TOFU_CJK
#define TOFU_EMOJI
#define TOFU_HISTORIC
#define TOFU_SYMBOL
#define TOFU_SIL

-> Despite several fonts being disabled by the above #defines, the build process will still include them in libmupdf.so unless
-> they are deleted from source before compilation! (ref: https://bugs.ghostscript.com/show_bug.cgi?id=697763):
for font in droid han noto sil; do
	rm -rf ./resources/fonts/$font
done

cp build-mupdf.sh ./
chmod a+x build-mupdf.sh
./build-mupdf.sh

##### the rest of this file is build-mupdf.sh #####
#!/bin/sh

sed -i '/MU.*_EXE. :/{
        s/\(.(MUPDF_LIB)\)\(.*\)$/\2 | \1/
        N
        s/$/ -lmupdf -L$(OUT)/
        }' Makefile

cat > user.make << EOF &&
USE_SYSTEM_FREETYPE := yes
USE_SYSTEM_HARFBUZZ := yes
USE_SYSTEM_JBIG2DEC := no
USE_SYSTEM_JPEGXR := no # not used without HAVE_JPEGXR
USE_SYSTEM_LCMS2 := no # need lcms2-art fork
USE_SYSTEM_LIBJPEG := yes
USE_SYSTEM_MUJS := no # build needs source anyway
USE_SYSTEM_OPENJPEG := yes
USE_SYSTEM_ZLIB := yes
USE_SYSTEM_GLUT := no # need freeglut2-art fork
USE_SYSTEM_CURL := yes
USE_SYSTEM_GUMBO := no
EOF

export XCFLAGS="-fPIC -flto -fuse-linker-plugin -mtune=generic -Os -pipe -fno-asynchronous-unwind-tables"  &&
make build=release shared=yes            &&
unset XCFLAGS


mkdir /tmp/destmupdf
make prefix=/tmp/destmupdf/usr/local     \
     shared=yes                         \
     docdir=/tmp/destmupdf/usr/local/share/doc/mupdf-1.23.3 \
     install
chmod 755 /tmp/destmupdf/usr/local/lib/libmupdf.so
cd /tmp/destmupdf/usr/local/bin
ln -s ./mupdf-x11 ./mupdf