I don't understand why converting pdf to html requires gs to rasterize to png,
especially when pdftoppm can generate png.
In any case, instead of running gs, how about linking to libspectre or libgs?
configure could check for the libraries, and pdftohtml could enable whatever
functionality that requires gs only when the libraries are present so that the
libraries would not become a prerequisite for building poppler. pdftops
already has a conditional build enabled by -DSPLASH_CMYK=1, so there is a
precedent.
William
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