Without optimization GCC produces warnings for unreachable code paths. They check memcpy() against the object size even on paths that are dead for the inlined arguments. This breaks debug builds of app/test with -Werror on lib/stack/rte_stack_pile.h, and has required local pragma workarounds elsewhere.
Disable both warnings when optimization is 0. They stay enabled for optimized builds, where the analysis is flow-sensitive. Bugzilla ID: 2061 Reported-by: Ali Alnubani <[email protected]> Signed-off-by: Stephen Hemminger <[email protected]> --- config/meson.build | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/config/meson.build b/config/meson.build index 745097e8aa..bfac1cd93d 100644 --- a/config/meson.build +++ b/config/meson.build @@ -378,6 +378,12 @@ if cc.has_argument('-Wno-comma') no_comma_cflag = '-Wno-comma' endif +# GCC's string/memory access warnings are flow-insensitive without +# optimization and produce false positives on dead paths of inlined code. +if get_option('optimization') == '0' and cc.get_id() == 'gcc' + global_cflags += ['-Wno-stringop-overflow', '-Wno-stringop-overread'] +endif + foreach arg: global_cflags if cc.has_argument(arg) add_project_arguments(arg, language: 'c') -- 2.53.0
