Remove most libtiff dependencies

libtiff is no longer needed for OpenCL, so remove that dependency.

It is still suggested for Windows to redirect warning messages
from the tesseract executable to the console.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

Author: stweil

api/Makefile.am

@@ -85,9 +85,8 @@ tesseract_LDFLAGS = $(OPENCL_LDFLAGS)
 tesseract_LDADD += $(LEPTONICA_LIBS)
 tesseract_LDADD += $(OPENMP_CXXFLAGS)
 
-tesseract_LDADD += -ltiff
-
 if T_WIN
+tesseract_LDADD += -ltiff
 tesseract_LDADD += -lws2_32
 libtesseract_la_LDFLAGS += -no-undefined -Wl,--as-needed -lws2_32
 endif

configure.ac

@@ -78,7 +78,7 @@ AM_CONDITIONAL([GRAPHICS_DISABLED], false)
 AC_SUBST([AM_CPPFLAGS])
 
 OPENCL_INC="/opt/AMDAPP/include"
-OPENCL_LIBS="-lOpenCL -ltiff"
+OPENCL_LIBS="-lOpenCL"
 #############################
 #
 # Platform specific setup
@@ -226,7 +226,7 @@ case "${host_os}" in
       fi
       AM_CPPFLAGS="-DUSE_OPENCL $AM_CPPFLAGS"
       OPENCL_CPPFLAGS=""
-      OPENCL_LDFLAGS="-framework OpenCL -ltiff"
+      OPENCL_LDFLAGS="-framework OpenCL"
     fi
     ;;
   *)
@@ -240,9 +240,6 @@ case "${host_os}" in
         if !($have_opencl_lib); then
             AC_MSG_ERROR([Required OpenCL library not found!])
         fi
-        if !($have_tiff); then
-            AC_MSG_ERROR([Required TIFF headers not found! Try to install libtiff-dev?? package.])
-        fi
         AM_CPPFLAGS="-DUSE_OPENCL $AM_CPPFLAGS"
         OPENCL_CPPFLAGS="-I${OPENCL_INC}"
         OPENCL_LDFLAGS="${OPENCL_LIBS}"

opencl/openclwrapper.h

@@ -14,10 +14,6 @@
 #include <stdio.h>
 #include "allheaders.h"
 #include "pix.h"
-#ifdef USE_OPENCL
-#include "tiff.h"
-#include "tiffio.h"
-#endif
 #include "tprintf.h"
 
 // including CL/cl.h doesn't occur until USE_OPENCL defined below