ARM Linker warning L6776W

I am using the ARM clang tool chain version 6.10.1. The linker is showing the following warning: Warning: L6776W: The debug frame in .debug_frame(CHostComm.o) does not describe an executable section...
ARM Linker warning L6776W

I am using the ARM clang tool chain version 6.10.1. The linker is showing the following warning: Warning: L6776W: The debug frame in .debug_frame(CHostComm.o) does not describe an executable section...
How to suppress this warning " empty expression statement has no effect; remove unnecessary ';' to silence this warning [-Wextra-semi-stmt]"

Hi, I am using Keil uVision V5.37.0.0 and compiler version is 6.18, I am getting tons of above warnings in different files with this version of uVision, the same was built without any warnings on previous...
warnings

Hi, Why do I get these warnings? Are these warnings critical, and can they get the program to crash? assembling STARTUP.A51... linking... *** WARNING L16: UNCALLED SEGMENT, IGNORED FOR...
warnings

upon building my application in keil I get following warning *** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL