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Apitrace is affected by Gcc Bug 68485 that has already been worked around, but after version bumping, CMakeLists.txt adds -O2 to CMAKE_C_FLAGS_RELWITHDEBINFO that is in order appended to CMAKE_C_FLAGS, making -O0 end appending to fail. To prevent this we need to avoid CMAKE_C_FLAGS_RELWITHDEBINFO to be appended to CMAKE_C_FLAGS, so let's do the same as flare-engine package that set CMAKE_BUILD_TYPE to a fake build type called "buildroot", this way -O2 won't be appended after -O0 and work around restart to work as expected. Fixes: http://autobuild.buildroot.net/results/2e3/2e31abd7b115d4c29117ca82007fd4f87f853ff7/ Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>