Thank you for your support.

Here is the header file:

#ifndef LINE_OPTIMIZATION_H
#define LINE_OPTIMIZATION_H

#include "opencv2/opencv.hpp"
#include <iostream>
#include <fstream>
#include <string>
#include <map>

class LineOptimization {
public:
    LineOptimization();

    // Load the PGM map
    bool loadMap(const std::string& filePath);

    // Apply noise reduction (Median or Gaussian filter)
    void reduceNoise(int filterType, int kernelSize);

    // Apply Canny edge detection
    void applyCannyEdgeDetection(double lowThreshold, double highThreshold);

    // Apply morphological closing (without edge detection)
    void applyMorphologicalClosing(int kernelSize);

    // Save the optimized map
    bool saveMap(const std::string& outputPath);

    // Display the map (optional)
    void displayMap(const std::string& windowName);

    void connectOccupiedContours(double cannyLowThreshold, double cannyHighThreshold, int hullLineThickness, double maxDistance);

    void fillFreeSpace();

    // Straighten contours to orthogonal lines
    void straightenContours(int epsilon, double contourAreaThreshold);

    // void loadConfig(const std::string& configFilePath);

    void lineOptimization(const std::string& input_directory, const std::string& output_directory, const std::string& map_name);

private:
    cv::Mat mapImage;  // Store the map as a matrix
};

#endif

Here is the output of log:
/usr/include/c++/9/iostream:13:0: error: File not found: bits/c++config.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 /usr/include/c++/9/ext/numeric_traits.h:59:270: error: Modulus by zero /usr/include/c++/9/ext/numeric_traits.h:60:59: error: Modulus by zero /usr/include/c++/9/ext/numeric_traits.h:61:59: error: Modulus by zero /usr/include/c++/9/ext/numeric_traits.h:62:59: error: Modulus by zero /usr/include/c++/9/bits/localefwd.h:15:0: error: File not found: bits/c++locale.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 /usr/include/features.h:215:18: error: Unexpected operator ? /usr/include/features.h:215:37: warning: Unexpected nonwhite token /usr/include/features.h:215:43: warning: Unexpected nonwhite token /usr/include/features.h:227:53: error: Unexpected operator ? /usr/include/features.h:227:106: error: missing ) in expression /usr/include/features.h:227:106: error: missing ) in expression /usr/include/features.h:227:106: warning: Unexpected nonwhite token /usr/include/features.h:227:106: warning: Unexpected nonwhite token /usr/include/features.h:227:107: warning: Unexpected nonwhite token /usr/include/features.h:227:113: warning: Unexpected nonwhite token /usr/include/features.h:227:128: warning: Unexpected nonwhite token /usr/include/features.h:227:129: warning: Unexpected nonwhite token /usr/include/features.h:227:144: warning: Unexpected nonwhite token /usr/include/features.h:227:144: warning: Unexpected nonwhite token /usr/include/features.h:227:150: warning: Unexpected nonwhite token /usr/include/features.h:227:150: warning: Unexpected nonwhite token /usr/include/features.h:227:151: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:45: error: Unexpected operator ? /usr/include/sys/cdefs.h:276:61: error: missing ) in expression /usr/include/sys/cdefs.h:276:61: error: missing ) in expression /usr/include/sys/cdefs.h:276:61: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:60: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:61: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:61: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:71: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:73: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:73: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:85: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:85: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:86: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:86: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:87: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:276:87: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:67: error: Unexpected operator ? /usr/include/sys/cdefs.h:295:83: error: missing ) in expression /usr/include/sys/cdefs.h:295:83: error: missing ) in expression /usr/include/sys/cdefs.h:295:83: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:82: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:83: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:83: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:93: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:94: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:94: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:95: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:107: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:107: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:108: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:109: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:109: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:110: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:111: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:117: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:131: warning: Unexpected nonwhite token /usr/include/sys/cdefs.h:295:131: warning: Unexpected nonwhite token /usr/include/c++/9/ext/atomicity.h:13:0: error: File not found: bits/gthr.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 /usr/include/c++/9/ext/atomicity.h:14:0: error: File not found: bits/atomic_word.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 /usr/include/c++/9/bits/allocator.h:25:0: error: File not found: bits/c++allocator.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 /usr/include/c++/9/bits/locale_facets.h:15:0: error: File not found: bits/ctype_base.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 /usr/include/c++/9/bits/locale_facets.h:1273:0: error: File not found: bits/ctype_inline.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 /usr/include/stdio.h:27:0: error: File not found: stddef.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 /usr/include/c++/9/fstream:16:0: error: File not found: bits/basic_file.h in . /usr/include /usr/local/include /usr/include/c++/9 /usr/include/c++/9/tr1 java.util.concurrent.TimeoutException
Is throwing java.util.concurrent.TimeoutException.
and
Problem is 'error: File not found: bits/c++config.h' ok?.

Guess similar issue.
BridJ (via JNAerator studio) fails to process simple code with includes throwing 'OutOfMemory'