Hi, i'm trying to set up a gentoo-distro on my udoo quad. After I build a lot of packages i've started to wonder about the cflags to use. Since gentoo compiles almost everything from scratch it might be interesting ;-) cat /proc/cpuinfo gave me: Features : swp half thumb fastmult vfp edsp neon vfpv3 the stage3 tar ball was: stage3-armv7a_hardfp-20141023.tar.bz2 and I didn't change the c-flags in /etc/portage/make.conf Thus my cflags are: CFLAGS="-O2 -pipe -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=hard" What do you think ? Do you think that those flags are reasonable ? I guess not, cause mfpu might be wrong, but which one to choose ? Neon, vfp or vfpv3 ? Would be happy to hear about your opinions ;-) Have fun, schnabelvieh
Openelec is using: Code: TARGET_CFLAGS="-march=armv7-a -mabi=aapcs-linux -Wno-psabi -Wa,-mno-warn-deprecated -mcpu=cortex-a9 -mfloat-abi=hard -mfpu=neon" TARGET_LDFLAGS="-march=armv7-a -mtune=cortex-a9" GCC_OPTS="--with-abi=aapcs-linux --with-arch=armv7-a --with-float=hard --with-fpu=neon"
Hi vpeter, thanks so fare. I'm wondering about the "TARGET" part in the variables. Does it mean those variable come from a crossdev - helper which compiles stuff using the TARGET-FLAGS for the Udoo ? have fun, schnabelvieh
