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celfiardwarf

Change DWARF elf format in IAR ARM V8 compiler

In our development, we switched from IAR ARM V7.40 to IAR ARM V8.40

We are using the python package pyelftools for postprocessing of the debug information. Unfortunately, this seems to be broken now, as the V8-compiler seems to use DWARF4 syntax, which is not fully covered by pyelftools. The V7-compiler used DWARF3 which was fine.

Is there any compiler option for IAR V8 to change DWARF format? In the IAR C/C++ Development Guide, I only find the --debug, -r option to enable debug information, but no further fine tunings (e.g. like -gdwarf-3 option for the arm-clang compiler).

Solution

  • There is a hidden compiler option --no_dwarf4 which disables DWARF4. This works fine for our problem.

    Unfortunately, this compiler option is neither documented in the IAR C/C++ Development Guide nor listed in the command line help ($ iccarm --help) for the compiler.