Error when trying to make

[Fiuse]

When trying to make the program I get the following error:

In file included from ./draw_png.h:9,
                 from main.cpp:2:
././colors.h:123:22: error: ‘filesystem’ in namespace ‘std’ does not name a type
  123 | bool load(const std::filesystem::path &, Palette *);
      |                      ^~~~~~~~~~
././colors.h:123:39: error: expected unqualified-id before ‘&’ token
  123 | bool load(const std::filesystem::path &, Palette *);
      |                                       ^
././colors.h:123:38: error: expected ‘)’ before ‘&’ token
  123 | bool load(const std::filesystem::path &, Palette *);
      |          ~                           ^~
      |                                      )
././colors.h:123:39: error: non-member function ‘bool Colors::load(...)’ cannot have ref-qualifier
  123 | bool load(const std::filesystem::path &, Palette *);
      |                                       ^
././colors.h:123:50: error: expected initializer before ‘*’ token
  123 | bool load(const std::filesystem::path &, Palette *);
      |                                                  ^
././colors.h:124:22: error: ‘filesystem’ in namespace ‘std’ does not name a type
  124 | bool load(const std::filesystem::path &, const std::vector<string> &filter,
      |                      ^~~~~~~~~~
././colors.h:124:39: error: expected unqualified-id before ‘&’ token
  124 | bool load(const std::filesystem::path &, const std::vector<string> &filter,
      |                                       ^
././colors.h:124:38: error: expected ‘)’ before ‘&’ token
  124 | bool load(const std::filesystem::path &, const std::vector<string> &filter,
      |          ~                           ^~
      |                                      )
././colors.h:124:39: error: non-member function ‘bool Colors::load(...)’ cannot have ref-qualifier
  124 | bool load(const std::filesystem::path &, const std::vector<string> &filter,
      |                                       ^
././colors.h:124:42: error: expected unqualified-id before ‘const’
  124 | bool load(const std::filesystem::path &, const std::vector<string> &filter,
      |                                          ^~~~~
In file included from ././settings.h:5,
                 from ./draw_png.h:11,
                 from main.cpp:2:
./././worldloader.h:74:24: error: ‘filesystem’ in namespace ‘std’ does not name a type
   74 |   void load(const std::filesystem::path &regionDir);
      |                        ^~~~~~~~~~
./././worldloader.h:74:41: error: expected unqualified-id before ‘&’ token
   74 |   void load(const std::filesystem::path &regionDir);
      |                                         ^
./././worldloader.h:74:40: error: expected ‘)’ before ‘&’ token
   74 |   void load(const std::filesystem::path &regionDir);
      |            ~                           ^~
      |                                        )
./././worldloader.h:74:41: error: expected ‘;’ at end of member declaration
   74 |   void load(const std::filesystem::path &regionDir);
      |                                         ^
      |                                          ;
./././worldloader.h:74:42: error: ‘regionDir’ does not name a type
   74 |   void load(const std::filesystem::path &regionDir);
      |                                          ^~~~~~~~~
./././worldloader.h:75:30: error: ‘filesystem’ in namespace ‘std’ does not name a type
   75 |   void loadRegion(const std::filesystem::path &regionFile, const int regionX,
      |                              ^~~~~~~~~~
./././worldloader.h:75:47: error: expected unqualified-id before ‘&’ token
   75 |   void loadRegion(const std::filesystem::path &regionFile, const int regionX,
      |                                               ^
./././worldloader.h:75:46: error: expected ‘)’ before ‘&’ token
   75 |   void loadRegion(const std::filesystem::path &regionFile, const int regionX,
      |                  ~                           ^~
      |                                              )
./././worldloader.h:75:47: error: expected ‘;’ at end of member declaration
   75 |   void loadRegion(const std::filesystem::path &regionFile, const int regionX,
      |                                               ^
      |                                                ;
./././worldloader.h:75:48: error: ‘regionFile’ does not name a type
   75 |   void loadRegion(const std::filesystem::path &regionFile, const int regionX,
      |                                                ^~~~~~~~~~
In file included from ./draw_png.h:11,
                 from main.cpp:2:
././settings.h:19:8: error: ‘filesystem’ in namespace ‘std’ does not name a type
   19 |   std::filesystem::path saveName, outFile, colorFile;
      |        ^~~~~~~~~~
././settings.h:59:8: error: ‘filesystem’ in namespace ‘std’ does not name a type
   59 |   std::filesystem::path regionDir() {
      |        ^~~~~~~~~~
././settings.h: In constructor ‘Settings::WorldOptions::WorldOptions()’:
././settings.h:40:5: error: ‘saveName’ was not declared in this scope
   40 |     saveName = "";
      |     ^~~~~~~~
././settings.h:42:5: error: ‘outFile’ was not declared in this scope
   42 |     outFile = "output.png";
      |     ^~~~~~~
././settings.h:43:5: error: ‘colorFile’ was not declared in this scope
   43 |     colorFile = "colors.json";
      |     ^~~~~~~~~
In file included from main.cpp:2:
./draw_png.h: At global scope:
./draw_png.h:84:20: error: ‘filesystem’ in namespace ‘std’ does not name a type
   84 |   Image(const std::filesystem::path file, const IsometricCanvas &canvas,
      |                    ^~~~~~~~~~
./draw_png.h:84:37: error: expected unqualified-id before ‘file’
   84 |   Image(const std::filesystem::path file, const IsometricCanvas &canvas,
      |                                     ^~~~
./draw_png.h:84:36: error: expected ‘)’ before ‘file’
   84 |   Image(const std::filesystem::path file, const IsometricCanvas &canvas,
      |        ~                           ^~~~~
      |                                    )
./draw_png.h:84:32: error: expected ‘;’ at end of member declaration
   84 |   Image(const std::filesystem::path file, const IsometricCanvas &canvas,
      |                                ^~~~
      |                                    ;
./draw_png.h:84:37: error: ‘file’ does not name a type
   84 |   Image(const std::filesystem::path file, const IsometricCanvas &canvas,
      |                                     ^~~~
main.cpp: In function ‘int main(int, char**)’:
main.cpp:50:8: error: ‘std::filesystem’ has not been declared
   50 |   std::filesystem::path regionDir = options.regionDir();
      |        ^~~~~~~~~~
main.cpp:54:22: error: ‘regionDir’ was not declared in this scope
   54 |   world.terrain.load(regionDir);
      |                      ^~~~~~~~~
main.cpp:56:29: error: ‘struct Settings::WorldOptions’ has no member named ‘colorFile’
   56 |   if (!Colors::load(options.colorFile, world.terrain.cache, &colors))
      |                             ^~~~~~~~~
main.cpp:68:28: error: ‘struct Settings::WorldOptions’ has no member named ‘outFile’
   68 |   PNG::Image image(options.outFile, canvas, colors);
      |                            ^~~~~~~
<builtin>: recipe for target 'main' failed
make: *** [main] Error 1

[spoutn1k]

Somehow your compiler does not find std::filesystem at first glance. What is your compiler/os ?
It is a C++17 feature, so there is a minimum version requirement. On linux you can use gcc --version to get the version number.
Check if the -std=c++17 flag is present in the output of make; if it is, you may need to upgrade your compiler.

[Fiuse]

Was able to get it to work when updating gcc thanks for the help!