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  • Yann E. MORIN's avatar
    toolchain: get rid of -pipe from optimisations · 01c34b38
    Yann E. MORIN authored
    -pipe is causing some build failures in Linux kernel >= 3.17.
    Also, nowadays, using -pipe does not gain as much as it used to back in
    the days:
    Measurements made with a 3.16.7 Linux kernel:
        make linux-depends
        time sh -c 'make linux-build >/dev/null 2>&1'
    Without -pipe:
        716.32user 54.44system 3:42.12elapsed 346%CPU
        721.22user 54.47system 3:41.81elapsed 349%CPU
        722.44user 54.00system 3:42.13elapsed 349%CPU
        721.03user 53.81system 3:41.92elapsed 349%CPU
        713.21user 53.63system 3:40.51elapsed 347%CPU
        706.67user 52.42system 3:38.40elapsed 347%CPU
        714.40user 53.18system 3:40.16elapsed 348%CPU
        706.01user 53.09system 3:37.87elapsed 348%CPU
        705.98user 53.01system 3:38.03elapsed 348%CPU
        714.17user 53.55system 3:39.98elapsed 348%CPU
    Average:                   3:40.29elapsed
    With -pipe:
        720.13user 53.90system 3:41.98elapsed 348%CPU
        713.38user 53.69system 3:40.44elapsed 347%CPU
        711.60user 52.81system 3:39.06elapsed 348%CPU
        708.66user 53.09system 3:38.59elapsed 348%CPU
        711.76user 53.00system 3:38.48elapsed 350%CPU
        717.85user 53.97system 3:41.77elapsed 348%CPU
        716.77user 53.77system 3:40.91elapsed 348%CPU
        717.48user 53.65system 3:41.24elapsed 348%CPU
        721.44user 55.67system 3:43.45elapsed 347%CPU
        724.61user 55.63system 3:43.35elapsed 349%CPU
    Average:                   3:40.93elapsed
    The delta is well in the measurement noise.
    Just get rid of it.
    Signed-off-by: default avatar"Yann E. MORIN" <>
    Cc: Romain Naour <>
    Cc: Thomas Petazzoni <>
    Signed-off-by: default avatarThomas Petazzoni <>