Any build option can be enabled or disabled by appending the end
of its name to the config name.
Examples:
+INTRINSICS to enable CONFIG_RTE_FORCE_INTRINSICS
~RXTX_CALLBACKS to disable CONFIG_RTE_ETHDEV_RXTX_CALLBACKS
These builtin (lowercase) options are also added for convenience:
+debug to enable every debug options
+default to set target machine as default
Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
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