And got this
:~/netsurf-r9615$ make
M.CONFIG: building with JPEG support
M.CONFIG: building with JNG/MNG/PNG support
M.CONFIG: building with PDF export
M.CONFIG: building with glibc internal iconv
M.CONFIG: auto-enabled SVG rendering (librsvg-2.0).
M.CONFIG: building with NetSurf BMP decoder
M.CONFIG: auto-enabled NetSurf BMP decoder (libnsbmp).
M.CONFIG: building with NetSurf GIF decoder
M.CONFIG: auto-enabled NetSurf GIF decoder (libnsgif).
M.CONFIG: building with PNG support
M.CONFIG: auto-enabled PNG support (libpng).
LINK: nsgtk
build-Linux-gtk/desktop_save_pdf_pdf_plotters.o: In function
`pdf_extract_image':
/home/mark/netsurf-r9615/desktop/save_pdf/pdf_plotters.c:486: undefined
reference to `HPDF_Image_AddSMask'
collect2: ld returned 1 exit status
make: *** [nsgtk] Error 1
