* Use `fopen`, `fwrite`, `fflush` and `fclose` which are thread-safety.
* Add some macros to help to find problems.
Add `OPENTELEMETRY_ATTRIBUTE_LIFETIME_BOUND` , `OPENTELEMETRY_SANITIZER_NO_MEMORY` , `OPENTELEMETRY_SANITIZER_NO_THREAD`, `OPENTELEMETRY_SANITIZER_NO_ADDRESS`, `OPENTELEMETRY_HAVE_BUILTIN`, `OPENTELEMETRY_HAVE_FEATURE`, `OPENTELEMETRY_HAVE_ATTRIBUTE`, `OPENTELEMETRY_HAVE_CPP_ATTRIBUTE`
* Append EOL before call Export of backend
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Co-authored-by: Marc Alff <marc.alff@oracle.com>
Pranav Sharma
WenTao Ou
Marc Alff
Tom Tan
Lalit Kumar Bhasin
WenTao Ou