That was indeed a problem in the very early 80’s Ada compilers. That’s certainly not a problem now. There’s now an Ada compiler built on the GCC back-end that works quite nicely and there is active work on it all the time.
The Boeing 777 FMS is written in Ada. They started with C++ and Ada, and by the time they were about 40% of the way into the coding, they realized that the reliability of the Ada code was so much better, they canned the C++ version of the projects and converted everyone over to Ada.
Ada got a bad rap from those early compilers, especially the NYU/Ed compiler written in Setl, which was horribly slow (like three lines of source code compiled per minute of CPU time). This allowed an opening for crap like C++ to get a chokehold on the US software industry, with the attending results we see today.
Ada is a structured, statically typed, imperative, and object-oriented high-level computer programming language, extended from Pascal and other languages. It was originally designed by a team led by Jean Ichbiah of CII Honeywell Bull under contract to the United States Department of Defense (DoD) from 1977 to 1983 to supersede the hundreds of programming languages then used by the DoD. Ada is strongly typed and compilers are validated for reliability in mission-critical applications, such as avionics software.