nixpkgs/pkgs/applications/misc/k2pdfopt/k2pdfopt.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4a2378b..502c477 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -52,6 +52,7 @@ endif(JPEG_FOUND)
 include(FindJasper)
 if(JASPER_FOUND)
   set(HAVE_JASPER_LIB 1)
+  set(K2PDFOPT_LIB ${K2PDFOPT_LIB} ${JASPER_LIBRARY})
 endif(JASPER_FOUND)
 
 # paths from willuslib/wgs.c
@@ -66,8 +67,12 @@ else()
   message(STATUS "Could NOT find ghostscript executable")
 endif(GHOSTSCRIPT_EXECUTABLE)
 
-# willus.h
-# HAVE_GSL_LIB
+pkg_check_modules(GSL gsl)
+if(GSL_FOUND)
+  set(HAVE_GSL_LIB 1)
+  include_directories(SYSTEM ${GSL_INCLUDEDIR})
+  set(K2PDFOPT_LIB ${K2PDFOPT_LIB} ${GSL_LDFLAGS})
+endif(GSL_FOUND)
 
 
 # libfreetype6 (>= 2.3.9), libjbig2dec0, libjpeg8 (>= 8c), libx11-6, libxext6, zlib1g (>= 1:1.2.0)
@@ -80,7 +85,7 @@ if(MUPDF_FOUND)
   include_directories(SYSTEM ${MUPDF_INCLUDEDIR})
   message(STATUS "mupdf libraries: ${MUPDF_LDFLAGS}")
   set(K2PDFOPT_LIB ${K2PDFOPT_LIB} ${MUPDF_LDFLAGS} 
-    -lmupdf-js-none -lopenjpeg -ljbig2dec -ljpeg -lfreetype
+ 
   )
 endif(MUPDF_FOUND)
 
@@ -91,9 +96,25 @@ if(DJVU_FOUND)
   set(K2PDFOPT_LIB ${K2PDFOPT_LIB} ${DJVU_LDFLAGS})
 endif(DJVU_FOUND)
 
-# HAVE_GOCR_LIB
-# HAVE_LEPTONICA_LIB
-# HAVE_TESSERACT_LIB
+find_library(GOCR_LIB NAMES Pgm2asc)
+if(GOCR_LIB)
+  set(HAVE_GOCR_LIB 1)
+  set(K2PDFOPT_LIB ${K2PDFOPT_LIB} ${GOCR_LIB})
+endif(GOCR_LIB)
+
+pkg_check_modules(LEPTONICA lept)
+if(LEPTONICA_FOUND)
+  set(HAVE_LEPTONICA_LIB 1)
+  include_directories(SYSTEM ${LEPTONICA_INCLUDEDIR})
+  set(K2PDFOPT_LIB ${K2PDFOPT_LIB} ${LEPTONICA_LDFLAGS})
+endif(LEPTONICA_FOUND)
+
+pkg_check_modules(TESSERACT tesseract)
+if(TESSERACT_FOUND)
+  set(HAVE_TESSERACT_LIB 1)
+  include_directories(SYSTEM ${TESSERACT_INCLUDEDIR})
+  set(K2PDFOPT_LIB ${K2PDFOPT_LIB} ${TESSERACT_LDFLAGS})
+endif(TESSERACT_FOUND)
 
 # ---- Describe project
 
diff --git a/willuslib/CMakeLists.txt b/willuslib/CMakeLists.txt
index 463bbc9..8043db5 100644
--- a/willuslib/CMakeLists.txt
+++ b/willuslib/CMakeLists.txt
@@ -6,7 +6,7 @@ include_directories(..)
 set(WILLUSLIB_SRC
     ansi.c array.c bmp.c bmpdjvu.c bmpmupdf.c dtcompress.c filelist.c
     fontdata.c fontrender.c gslpolyfit.c linux.c math.c mem.c ocr.c
-    ocrjocr.c ocrtess.c pdfwrite.c point2d.c render.c strbuf.c string.c
+    ocrgocr.c ocrtess.c pdfwrite.c point2d.c render.c strbuf.c string.c
     token.c wfile.c wgs.c wgui.c willusversion.c win.c winbmp.c
     wincomdlg.c winmbox.c winshell.c wmupdf.c wmupdfinfo.c wpdf.c wsys.c
     wzfile.c wleptonica.c
diff --git a/willuslib/ocrgocr.c b/willuslib/ocrgocr.c
index 6027e9a..fbe10f0 100644
--- a/willuslib/ocrgocr.c
+++ b/willuslib/ocrgocr.c
@@ -29,6 +29,8 @@
 #ifdef HAVE_GOCR_LIB
 #include <gocr.h>
 
+job_t *OCR_JOB;
+
 /*
 ** bmp8 must be grayscale
 ** (x1,y1) and (x2,y2) from top left of bitmap
@@ -63,6 +65,7 @@ void gocr_single_word_from_bmp8(char *text,int maxlen,WILLUSBITMAP *bmp8,
     h=y2-y1+1;
     dh=h+bw*2;
     job=&_job;
+    OCR_JOB=job;
     job_init(job);
     job_init_image(job);
     // willus_mem_alloc_warn((void **)&job->src.p.p,w*h,funcname,10);