[BUG] Unable to load dependency files with UTF-8 characters in their name on Linux

[LeadRDRK]

Describe the bug
Dependency files with UTF-8 characters in their name cannot be loaded on Linux.

To Reproduce
Steps to reproduce the behavior:

1. Click on Open Project (or anything else that needs to open a file)
2. Select a file that has dependencies which have UTF-8 characters in their names.
3. Error occurs with garbled file name, or if it's a model, loads with incomplete assets/garbled names.

Same thing happens when using drag and drop. Error seems to occur when the program tries to load the dependencies of a project/model/etc.

Expected behavior
The file should load normally and the file name should not be garbled.

Screenshots
When trying to open a project:

When loading a model:

Desktop:

• OS: Arch Linux

Additional context
Built with the following CMake invocation:

cmake -G Ninja .. -DNANOEM_ENABLE_IMGUI_FILE_DIALOG=ON

Without enabling NANOEM_ENABLE_IMGUI_FILE_DIALOG, trying to open anything that needs to select a file does nothing.

[hkrn]

It seems to be a similar case to issue #382. The default build options disable ICU, which is necessary for handling multibyte characters, thus preventing proper processing of multibyte characters.

Please proceed with the following steps to rebuild.

cd /path/to/nanoem/repository
git clone https://github.com/unicode-org/icu/ dependencies/icu
# checkout proper version of ICU4C automatically
cmake -P scripts/build.cmake
cmake -G Ninja .. -DNANOEM_ENABLE_IMGUI_FILE_DIALOG=ON -DNANOEM_ENABLE_BUILD_ICU4C=ON

[LeadRDRK]

Thank you for your response.

It's more convenient to just link to the system's libraries on Linux, so I ran CMake with these options to build it:

cmake -G Ninja .. -DNANOEM_ENABLE_IMGUI_FILE_DIALOG=ON -DNANOEM_ENABLE_ICU=ON -DICU4C_INCLUDE_DIR=/usr/include/unicode -DICU4C_I18N_LIBRARY_RELEASE=/usr/lib/libicui18n.so -DICU4C_UC_LIBRARY_RELEASE=/usr/lib/libicuuc.so -DICU4C_DATA_LIBRARY_RELEASE=/usr/lib/libicudata.so

The problem is fixed with these options enabled.