FileHelper.h:8:62: error: ‘size_t’ has not been declared

[djkato]

hello,
When I tried to compile https://github.com/pcwalton/gltf-ibl-sampler-egui , it kept failing on FileHelper.h:8:62: error: ‘size_t’ has not been declared. All I did is clone this repo.
I'm not knowledgeable about cpp, so this is all I can provide. Probably I'm doing something wrong, would be nice to know what.

djkato@djkato-vfx ~/C/g/glTF-IBL-Sampler (master)> cmake .
-- The C compiler identification is GNU 11.4.1
-- The CXX compiler identification is GNU 11.4.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- 'IBLSAMPLER_EXPORT_SHADERS' is FALSE
volk: using VULKAN_HEADERS_INSTALL_DIR option
-- 
-- Configuring done (0.2s)
-- Generating done (0.0s)
-- Build files have been written to: /home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler

djkato@djkato-vfx ~/C/g/glTF-IBL-Sampler (master)> make
[  9%] Building C object thirdparty/volk/CMakeFiles/volk.dir/volk.c.o
[ 18%] Linking C static library libvolk.a
[ 18%] Built target volk
[ 27%] Building CXX object CMakeFiles/GltfIblSampler.dir/lib/source/FileHelper.cpp.o
In file included from /home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/FileHelper.cpp:1:
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/FileHelper.h:8:62: error: ‘size_t’ has not been declared
    8 |         bool writeFile(const char* _path, const char* _data, size_t _bytes);
      |                                                              ^~~~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/FileHelper.cpp:28:75: error: ‘bool IBLLib::writeFile(const char*, const char*, size_t)’ should have been declared inside ‘IBLLib’
   28 | bool IBLLib::writeFile(const char* _path, const char* _data, size_t _bytes)
      |                                                                           ^
make[2]: *** [CMakeFiles/GltfIblSampler.dir/build.make:76: CMakeFiles/GltfIblSampler.dir/lib/source/FileHelper.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:102: CMakeFiles/GltfIblSampler.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

When trying to fix like:
lib/source/FileHelper.h

-bool writeFile(const char *_path, const char *_data, size_t _bytes);
+bool writeFile(const char *_path, const char *_data, std::size_t _bytes);

It spewed more errors, and also found some missing files... This is beyond me, shame I can't use this tool.

djkato@djkato-vfx ~/C/g/glTF-IBL-Sampler (lite) [2]> make
[ 18%] Built target volk
[ 27%] Building CXX object CMakeFiles/GltfIblSampler.dir/lib/source/FileHelper.cpp.o
[ 36%] Building CXX object CMakeFiles/GltfIblSampler.dir/lib/source/STBImage.cpp.o
[ 45%] Building CXX object CMakeFiles/GltfIblSampler.dir/lib/source/format.cpp.o
[ 54%] Building CXX object CMakeFiles/GltfIblSampler.dir/lib/source/ktxImage.cpp.o
[ 63%] Building CXX object CMakeFiles/GltfIblSampler.dir/lib/source/lib.cpp.o
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp: In function ‘void IBLLib::convertImageOnCPU(std::vector<unsigned char>&, const std::vector<unsigned char>&, VkFormat, VkFormat)’:
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:288:42: error: ‘fminf’ was not declared in this scope
  288 |                 float redC = fmaxf(0.0f, fminf(sharedexpMax, r));
      |                                          ^~~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:288:30: error: ‘fmaxf’ was not declared in this scope
  288 |                 float redC = fmaxf(0.0f, fminf(sharedexpMax, r));
      |                              ^~~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:294:57: error: ‘log2f’ was not declared in this scope
  294 |                 float expSharedP = fmaxf(-16.0f, floorf(log2f(maxC))) + 16.0f;
      |                                                         ^~~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:294:50: error: ‘floorf’ was not declared in this scope
  294 |                 float expSharedP = fmaxf(-16.0f, floorf(log2f(maxC))) + 16.0f;
      |                                                  ^~~~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:296:44: error: ‘powf’ was not declared in this scope
  296 |                 float maxS = floorf(maxC / powf(2.0f, expSharedP - B - N) + 0.5f);
      |                                            ^~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp: In function ‘IBLLib::Result IBLLib::sample(const char*, const char*, const char*, IBLLib::Distribution, unsigned int, unsigned int, unsigned int, IBLLib::OutputFormat, float, bool)’:
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:871:87: error: ‘log2’ was not declared in this scope
  871 |         _mipmapCount = _mipmapCount != 0 ? _mipmapCount : static_cast<uint32_t>(floor(log2(_cubemapResolution)));
      |                                                                                       ^~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:871:81: error: ‘floor’ was not declared in this scope
  871 |         _mipmapCount = _mipmapCount != 0 ? _mipmapCount : static_cast<uint32_t>(floor(log2(_cubemapResolution)));
      |                                                                                 ^~~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:1092:25: warning: comparison between ‘enum IBLLib::Result’ and ‘enum VkResult’ [-Wenum-compare]
 1092 |                 if (res != VK_SUCCESS)
      |                     ~~~~^~~~~~~~~~~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:1234:140: warning: comparison between ‘enum IBLLib::Result’ and ‘enum VkResult’ [-Wenum-compare]
 1234 |         if (downloadCubemap(vulkan, convertedCubeMap, _outputPathCubeMap, static_cast<VkFormat>(_targetFormat), currentCubeMapImageLayout) != VK_SUCCESS)
      |             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
/home/djkato/Code/gltf-ibl-sampler-egui/glTF-IBL-Sampler/lib/source/lib.cpp:1242:114: warning: comparison between ‘enum IBLLib::Result’ and ‘enum VkResult’ [-Wenum-compare]
 1242 |                 if (download2DImage(vulkan, outputLUT, _outputPathLUT, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL) != VK_SUCCESS)
      |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
make[2]: *** [CMakeFiles/GltfIblSampler.dir/build.make:132: CMakeFiles/GltfIblSampler.dir/lib/source/lib.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:102: CMakeFiles/GltfIblSampler.dir/all] Error 2
make: *** [Makefile:136: all] Error 2