[MacPorts] #62832: Enable Tesseract support for ghostscript

[MacPorts]

#62832: Enable Tesseract support for ghostscript
-------------------------+-------------------------
 Reporter:  nickgaya     |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  ghostscript
-------------------------+-------------------------
 Ghostscript 9.53.0 added optional support for the Tesseract OCR engine. In
 9.54.0, Tesseract/Leptonica sources were added to the release archive.
 However, I was not able to successfully build Ghostscript 9.54.0 with
 Tesseract enabled, due to errors such as this:

 {{{
 :info:build tesseract/include/tesseract/unichar.h:24:10: fatal error:
 'cstring'
 file not found
 :info:build #include <cstring>
 :info:build          ^~~~~~~~~
 }}}

 I think this warning is relevant, but I'm not familiar enough with C++ to
 know how to fix it:
 {{{
 :info:build warning: include path for stdlibc++ headers not found; pass
 '-stdlib
 =libc++' on the command line to use the libc++ standard library instead
 [-Wstdli
 bcxx-not-found]
 }}}

 Perhaps it might be possible to use the tesseract/leptonica ports instead
 of the Ghostscript versions, although this might require modifying the
 build.

 See also:
 * https://www.ghostscript.com/doc/9.54.0/News.htm
 * https://www.ghostscript.com/ocr.html

-- 
Ticket URL: <https://trac.macports.org/ticket/62832>
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