Hi, On Tue, Jun 15 2021, David Malcolm via Gcc wrote: >
[...] > > Are you perhaps building the first stage using clang, or a very old > gcc? That would likely generate very different debuginfo, which might > explain the differences in behavior that you're seeing in gdb. > > If I run into problems using gdb to debug the code, and all else fails, > I sometimes hack up the build flags in the generated Makefile to turn > off optimizations and add debug flags. > If you run make in the gcc subdirectory of the build directory, changed files are recompiled without optimization. Often when I am about to use gdb to debug the compiler, I touch tree.h and/or cgraph.h and then rebuild the compiler in this way to end up with an executable where things are not optimized away. Martin
