Linux, C++, shared libary: Create shared library using Tesseract - c++

Question

I have want to build a shared object/shared library to be used by an executable later on.
I have a directory with my own *.cpp as well as the corresponding *.h files.
All the files are located in the same directory as my makefile (-I.):
#makefile to create shared library w/o executable from own headers and tesseract
CC = g++
INCL = -I. -I/usr/include/tesseract/ -I/usr/include/leptonica/
CFLAGS= -Wall -g -c -fPIC
LDFLAGS = -shared
LIBS = libtesseract.a liblept.a
RM = rm -f
TARGET_LIB = libTargetLib.so
SRCS = *.cpp
OBJS = $(SRCS:.cpp=.o)
.PHONY: all
all: ${TARGET_LIB}
$(TARGET_LIB): $(OBJS)
$(CC) $(LDFLAGS) $(INCL) -Wl,-rpath=/usr/lib/x86_64-linux-gnu/ -o $(TARGET_LIB) $^ -L/usr/lib/x86_64-linux-gnu/ -llept -ltesseract
$(OBJS): $(SRCS)
$(CC) $(CFLAGS) $(SRCS)
The library files to be linked, libtesseract.a and liblept.a are in the location /usr/lib/x86_64-linux-gnu, I doublechecked.
I am aware of this problem: ambiguous symbol File: tesscallback.h so I also commented out the correspondent lines.
When I run make, I get this error (tons of lines more):
In file included from /usr/include/tesseract/baseapi.h:34:0,
from file1.h:16,
from file1.cpp:4: /usr/include/tesseract/tesscallback.h:296:12: error: expected
nested-name-specifier before ‘remove_reference’ typename
remove_reference::type p1_;
^~~~~~~~~~~~~~~~ /usr/include/tesseract/tesscallback.h:296:12: error: expected ‘;’ at
end of member declaration
/usr/include/tesseract/tesscallback.h:296:28: error: expected
unqualified-id before ‘<’ token typename remove_reference::type
p1_;
^ /usr/include/tesseract/tesscallback.h: In constructor ‘_ConstTessMemberResultCallback_1_0::_ConstTessMemberResultCallback_1_0(const T*,
_ConstTessMemberResultCallback_1_0::MemberSignature, P1)’: /usr/include/tesseract/tesscallback.h:301:29: error: class
‘_ConstTessMemberResultCallback_1_0’ does not have any
field named ‘p1_’
member_(member), p1_(p1) { }
^~~ /usr/include/tesseract/tesscallback.h: In member function ‘virtual R
_ConstTessMemberResultCallback_1_0::Run()’: /usr/include/tesseract/tesscallback.h:305:38: error: ‘p1_’ was not
declared in this scope
R result = (object_->*member_)(p1_);
^~~ /usr/include/tesseract/tesscallback.h:308:38: error: ‘p1_’ was not
declared in this scope
R result = (object_->member_)(p1_);
^~~ /usr/include/tesseract/tesscallback.h: At global scope:
/usr/include/tesseract/tesscallback.h:326:12: error: expected
nested-name-specifier before ‘remove_reference’ typename
remove_reference::type p1_;
^~~~~~~~~~~~~~~~ /usr/include/tesseract/tesscallback.h:326:12: error: expected ‘;’ at
end of member declaration
/usr/include/tesseract/tesscallback.h:326:28: error: expected
unqualified-id before ‘<’ token typename remove_reference::type
p1_;
^ /usr/include/tesseract/tesscallback.h: In constructor ‘_ConstTessMemberResultCallback_1_0::_ConstTessMemberResultCallback_1_0(const T,
_ConstTessMemberResultCallback_1_0::MemberSignature, P1)’: /usr/include/tesseract/tesscallback.h:331:29: error: class
‘_ConstTessMemberResultCallback_1_0’ does not have
any field named ‘p1_’
member_(member), p1_(p1) { }
^~~ /usr/include/tesseract/tesscallback.h: In member function ‘virtual
void _ConstTessMemberResultCallback_1_0::Run()’:
/usr/include/tesseract/tesscallback.h:335:27: error: ‘p1_’ was not
declared in this scope
(object_->*member_)(p1_);
^~~ /usr/include/tesseract/tesscallback.h:337:27: error: ‘p1_’ was not
declared in this scope
(object_->*member_)(p1_);
When I do not comment it out (i. e., lines still there), I get:
In file included from /usr/include/tesseract/baseapi.h:34:0,
from process_houghlines.h:18,
from process_houghlines.cpp:3: /usr/include/tesseract/tesscallback.h:278:29: error:
‘remove_reference’ is not a class template template
struct remove_reference { typedef T type; };
^~~~~~~~~~~~~~~~ /usr/include/tesseract/tesscallback.h:278:29: error: redefinition of
‘struct remove_reference’
/usr/include/tesseract/tesscallback.h:277:29: note: previous
definition of ‘struct remove_reference’ template
struct remove_reference { typedef T type; };
^~~~~~~~~~~~~~~~ /usr/include/tesseract/tesscallback.h:296:12: error: expected
nested-name-specifier before ‘remove_reference’ typename
remove_reference::type p1_;
^~~~~~~~~~~~~~~~ /usr/include/tesseract/tesscallback.h:296:12: error: expected ‘;’ at
end of member declaration
/usr/include/tesseract/tesscallback.h:296:28: error: expected
unqualified-id before ‘<’ token typename remove_reference::type
p1_;
^ /usr/include/tesseract/tesscallback.h: In constructor ‘_ConstTessMemberResultCallback_1_0::_ConstTessMemberResultCallback_1_0(const T*,
_ConstTessMemberResultCallback_1_0::MemberSignature, P1)’: /usr/include/tesseract/tesscallback.h:301:29: error: class
‘_ConstTessMemberResultCallback_1_0’ does not have any
field named ‘p1 ’
member_(member), p1_(p1) { }
^~~ /usr/include/tesseract/tesscallback.h: In member function ‘virtual R
_ConstTessMemberResultCallback_1_0::Run()’: /usr/include/tesseract/tesscallback.h:305:38: error: ‘p1_’ was not
declared in this scope
R result = (object_->*member_)(p1_);
^~~ /usr/include/tesseract/tesscallback.h:308:38: error: ‘p1_’ was not
declared in this scope
R result = (object_->member_)(p1_);
^~~ /usr/include/tesseract/tesscallback.h: At global scope:
/usr/include/tesseract/tesscallback.h:326:12: error: expected
nested-name-specifier before ‘remove_reference’ typename
remove_reference::type p1_;
^~~~~~~~~~~~~~~~ /usr/include/tesseract/tesscallback.h:326:12: error: expected ‘;’ at
end of member declaration
/usr/include/tesseract/tesscallback.h:326:28: error: expected
unqualified-id before ‘<’ token typename remove_reference::type
p1_;
^ /usr/include/tesseract/tesscallback.h: In constructor ‘_ConstTessMemberResultCallback_1_0::_ConstTessMemberResultCallback_1_0(const T,
_ConstTessMemberResultCallback_1_0::MemberSignature, P1)’: /usr/include/tesseract/tesscallback.h:331:29: error: class
‘_ConstTessMemberResultCallback_1_0’ does not have
any field named ... (reoccurring error)
The files file1.h and file1.cpp:
...
#include <tesseract/baseapi.h>
#include <leptonica/allheaders.h>
...
and
...
#include "file1.h"
...
The files file2.h and file2.cpp:
...
#include <tesseract/baseapi.h>
#include <leptonica/allheaders.h>
...
and
...
#include "file2.h"
...
I dont even understand, why the errors differ, since the headers are to the extend of using Tesseract just equal and one time the error occurs in one, than in the other file.
Thank you so much for any help.