The DODEBUG=y option of uClibc causes uClibc to be built with -O0 and
-DDEBUG, which has a significant runtime performance
impact. Currently, DODEBUG=y is passed when BR2_ENABLE_DEBUG=y, but
BR2_ENABLE_DEBUG is only about enabling debugging symbols, not about
runtime debugging additions. The more recently added
BR2_ENABLE_RUNTIME_DEBUG option is precisely designed for that, so we
changed the logic to pass DODEBUG=y when BR2_ENABLE_RUNTIME_DEBUG=y,
and not BR2_ENABLE_DEBUG=y.
This allows to build uClibc with debugging symbols when
BR2_ENABLE_DEBUG=y, without disabling optimizations and adding more
debugging features that have a runtime performance impact.
Signed-off-by: Ben Wolsieffer <Ben.Wolsieffer@hefring.com>
[Thomas: extracted from
https://patchwork.ozlabs.org/project/buildroot/patch/20220803200629.3172370-1-Ben.Wolsieffer@hefring.com/
and split into its own independent patch.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
f9867a725c