I have macOS High Sierra 10.13.6 (For various reason I will not update) and Xcode 10.1 installed alongside command-line-tools.
I am trying to compile a certain software that is attempting to open the following header file:
but it cannot find the file. When I manually explore the folder, the
stdlib.h file is located at:
I have tried so many things, from uninstalling and reinstalling, to trying out older versions, etc. I tried to "manually" install it, but there is no macOS SDK package to install.