Different compilation flags using CMAKE vs. Autotools

[Alpar Juttner]

• Autotool uses -g -O2 + a huge set of warning flags by default.
• Using scripts/bootstrap.sh, we have a choice to optimize or not (-O2 vs. nothing). This script uses -ggdb instead of -g (not a big diffenerce) and the same warning options.
• The CMAKE environment uses
  • no warning flags at all!!!
  • one of the following debug/optimization settings
    • -g (DEBUG mode),
    • -Os -DNDEBUG (MINRELSIZE mode),
    • -O2 -g (RELWITHDEBINFO mode), or
    • -O3 -DNDEBUG (RELEASE mode)