From: Thomas Petazzoni Date: Mon, 16 Mar 2015 15:51:27 +0100 Subject: [Buildroot] [PATCH 3/7 v6] package/fftw: add ARM optimisations In-Reply-To: <20150316143204.GC4271@free.fr> References: <930765fdc259da928cc44c19eb191f71d5132eef.1426513949.git.yann.morin.1998@free.fr> <20150316153050.68ab2d76@x230.trabucayre.com> <20150316143204.GC4271@free.fr> Message-ID: <20150316155127.38096559@free-electrons.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Dear Yann E. MORIN, On Mon, 16 Mar 2015 15:32:04 +0100, Yann E. MORIN wrote: > That's what I initially tried, but it did not work, as fftw compiles > parts of its code without specifying -mfpu=neon, and thus it falls to > the value specified by Buildroot, and the compilation breaks. In this case, pass -mfpu=neon explicitly, like we do in mplayer and vo-aacenc. Using NEON as the general purpose FPU is quite unlikely, since using NEON for FPU is not IEEE 754. So most likely people will use VFPv3/4 as the FPU, but may be interested in using NEON for specific things. Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com