This is a frequent culprit. Your compiler might require a specific version of ISL, like libisl-23.dll , but your system might have an older or newer version, such as libisl-15.dll . The compiler is hard-coded to look for libisl-23.dll , and it will fail if it finds any other version, even if the library is present.
pacman -S mingw-w64-x86_64-isl
If you have libisl-22.dll or libisl-25.dll but not version 23, renaming is (ABI changes). Instead: libisl-23.dll not found
A: DLLs are version-specific. A program built against version 23 cannot use version 25 because the function signatures (ABI) may have changed. You must install the exact version 23 . This is a frequent culprit
By following the steps in this guide, from a simple reinstall to using MSYS2's package manager, you can confidently resolve the libisl-23.dll error and get your development environment back on track. pacman -S mingw-w64-x86_64-isl If you have libisl-22
: Ensure the folder containing libisl-23.dll (usually the bin directory of your compiler) is included in your Windows system PATH environment variable.
: Some antivirus programs mistakenly flag these specific DLLs as suspicious and move them to quarantine or delete them entirely. Multiple Toolchains