Error `ld: library not found for <LIBRARY_NAME>` where LIBRARY_NAME might be -lpthread, -System etc occurs when building projects with Intel® Fortran compiler from Intel® oneAPI HPC Toolkit 2021.3.
Adding the -L/........Developers..... leads to a successful build that can be executed but the user still observes multiple warnings from LD that IPO library files not found
Solution:
There are two solutions, the simpler one (1) and more complicated (2):
1. Install command-line tools only
a) Install the Xcode command-line utilities: xcode-select --install
b) Run: sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
c) You may be prompted to accept a license. If so, accept the license with: sudo xcodebuild -license
2. Install the full Xcode* system from the App Store*
As a result, the linker runs successfully. -L/......./Developers/... and -lpthread -lm -ldl that was required for Catalina is no longer required as well.
Please, note that Fortran Integration into Xcode Removed.