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authorGravatar Yann E. MORIN <yann.morin.1998@free.fr>2014-12-21 14:00:25 +0100
committerGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2014-12-21 22:04:59 +0100
commit01c34b38a4181a3b82f7507546dc97619b4246ed (patch)
treee5c1554a31463fee64a9186814b362558c6990cb /toolchain
parentc56dc003c1ea6dd91e466f7714d05cd1a9452a20 (diff)
downloadbuildroot-01c34b38a4181a3b82f7507546dc97619b4246ed.tar.gz
buildroot-01c34b38a4181a3b82f7507546dc97619b4246ed.tar.bz2
toolchain: get rid of -pipe from optimisations
-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: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Romain Naour <romain.naour@openwide.fr> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'toolchain')
-rw-r--r--toolchain/toolchain-common.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/toolchain/toolchain-common.in b/toolchain/toolchain-common.in
index b2468341ff..2ee2019ac1 100644
--- a/toolchain/toolchain-common.in
+++ b/toolchain/toolchain-common.in
@@ -122,7 +122,7 @@ config BR2_USE_MMU
config BR2_TARGET_OPTIMIZATION
string "Target Optimizations"
- default "-pipe"
+ default ""
help
Optimizations to use when building for the target host.
NOTE: gcc optimization level is defined in build options.