Intel C Compiler: catastrophic error: Cannot open source file 'stdio.h'(MacOS Catalina 10.15)
icc -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
icpc -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
OR
icc main.c -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
icpc main.cpp -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
sdmrnv, 2022-10-18 [0.756ms, r]