nanopi neo notes

df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       3.6G 1023M  2.6G  29% /
devtmpfs         42M     0   42M   0% /dev
tmpfs           122M     0  122M   0% /dev/shm
tmpfs           122M  8.4M  113M   7% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           122M     0  122M   0% /sys/fs/cgroup

root@FriendlyARM:~# uname -a
Linux FriendlyARM 3.4.39-h3 #1 SMP PREEMPT Thu Aug 4 12:41:33 CST 2016 armv7l armv7l armv7l GNU/Linux


fa@FriendlyARM:~$ cat /proc/cpuinfo
Processor	: ARMv7 Processor rev 5 (v7l)
processor	: 0
BogoMIPS	: 4799.99

processor	: 1
BogoMIPS	: 4799.99

processor	: 2
BogoMIPS	: 4799.99

processor	: 3
BogoMIPS	: 4799.99

Features	: swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xc07
CPU revision	: 5

Hardware	: sun8i
Revision	: 0000
Serial		: 04005035c218241f04ce
==================== o ======================

fa@FriendlyARM:~$ gcc -march=native -Q --help=target
The following options are target specific:
  -mabi=                      		aapcs-linux
  -mabort-on-noreturn         		[disabled]
  -mandroid                   		[disabled]
  -mapcs                      		[disabled]
  -mapcs-float                		[disabled]
  -mapcs-frame                		[disabled]
  -mapcs-reentrant            		[disabled]
  -mapcs-stack-check          		[disabled]
  -march=                     		armv7ve
  -marm                       		[disabled]
  -masm-syntax-unified        		[disabled]
  -mbig-endian                		[disabled]
  -mbionic                    		[disabled]
  -mcallee-super-interworking 		[disabled]
  -mcaller-super-interworking 		[disabled]
  -mcpu=                      		[default]
  -mfix-cortex-m3-ldrd        		[enabled]
  -mfloat-abi=                		hard
  -mfp16-format=              		none
  -mfpu=                      		vfpv3-d16
  -mglibc                     		[enabled]
  -mhard-float
  -mlittle-endian             		[enabled]
  -mlong-calls                		[disabled]
  -mneon-for-64bits           		[disabled]
  -mnew-generic-costs         		[disabled]
  -mold-rtx-costs             		[disabled]
  -mpic-data-is-text-relative 		[enabled]
  -mpic-register=
  -mpoke-function-name        		[disabled]
  -mprint-tune-info           		[disabled]
  -mrestrict-it               		[enabled]
  -msched-prolog              		[enabled]
  -msingle-pic-base           		[disabled]
  -mslow-flash-data           		[disabled]
  -msoft-float
  -mstructure-size-boundary=  		0x20
  -mthumb                     		[enabled]
  -mthumb-interwork           		[enabled]
  -mtls-dialect=              		gnu
  -mtp=                       		auto
  -mtpcs-frame                		[disabled]
  -mtpcs-leaf-frame           		[disabled]
  -mtune=                     		[default]
  -muclibc                    		[disabled]
  -munaligned-access          		[enabled]
  -mvectorize-with-neon-double 		[disabled]
  -mvectorize-with-neon-quad  		[enabled]
  -mword-relocations          		[disabled]

  Known ARM ABIs (for use with the -mabi= option):
    aapcs aapcs-linux apcs-gnu atpcs iwmmxt

  Known ARM architectures (for use with the -march= option):
    armv2 armv2a armv3 armv3m armv4 armv4t armv5 armv5e armv5t armv5te armv6 armv6-m armv6j armv6k armv6s-m armv6t2 armv6z armv6zk armv7 armv7-a armv7-m armv7-r armv7e-m armv7ve armv8-a armv8-a+crc
    iwmmxt iwmmxt2 native

  Known __fp16 formats (for use with the -mfp16-format= option):
    alternative ieee none

  Known ARM FPUs (for use with the -mfpu= option):
    crypto-neon-fp-armv8 fp-armv8 fpv4-sp-d16 fpv5-d16 fpv5-sp-d16 neon neon-fp-armv8 neon-fp16 neon-vfpv4 vfp vfp3 vfpv3 vfpv3-d16 vfpv3-d16-fp16 vfpv3-fp16 vfpv3xd vfpv3xd-fp16 vfpv4 vfpv4-d16

  Valid arguments to -mtp=:
    auto cp15 soft

  Known floating-point ABIs (for use with the -mfloat-abi= option):
    hard soft softfp

  Known ARM CPUs (for use with the -mcpu= and -mtune= options):
    arm1020e arm1020t arm1022e arm1026ej-s arm10e arm10tdmi arm1136j-s arm1136jf-s arm1156t2-s arm1156t2f-s arm1176jz-s arm1176jzf-s arm2 arm250 arm3 arm6 arm60 arm600 arm610 arm620 arm7 arm70 arm700
    arm700i arm710 arm7100 arm710c arm710t arm720 arm720t arm740t arm7500 arm7500fe arm7d arm7di arm7dm arm7dmi arm7m arm7tdmi arm7tdmi-s arm8 arm810 arm9 arm920 arm920t arm922t arm926ej-s arm940t
    arm946e-s arm966e-s arm968e-s arm9e arm9tdmi cortex-a12 cortex-a15 cortex-a15.cortex-a7 cortex-a17 cortex-a17.cortex-a7 cortex-a5 cortex-a53 cortex-a57 cortex-a57.cortex-a53 cortex-a7 cortex-a72
    cortex-a72.cortex-a53 cortex-a8 cortex-a9 cortex-m0 cortex-m0.small-multiply cortex-m0plus cortex-m0plus.small-multiply cortex-m1 cortex-m1.small-multiply cortex-m3 cortex-m4 cortex-m7 cortex-r4
    cortex-r4f cortex-r5 cortex-r7 ep9312 exynos-m1 fa526 fa606te fa626 fa626te fa726te fmp626 generic-armv7-a iwmmxt iwmmxt2 marvell-pj4 mpcore mpcorenovfp native strongarm strongarm110 strongarm1100
    strongarm1110 xgene1 xscale

  TLS dialect to use:
    gnu gnu2



MEMORY SHIT:
#Increase swap area
sudo mkdir -p /var/cache/swap/
sudo dd if=/dev/zero of=/var/cache/swap/swap0 bs=1M count=512
sudo chmod 0600 /var/cache/swap/swap0
sudo mkswap /var/cache/swap/swap0 
sudo swapon /var/cache/swap/swap0

The swap file is not used after a restart. It can be integrated in /etc/fstab to use it after restart:
/var/cache/swap/swap0    none    swap    sw      0 0


RUN:
make CFLAGS="-march=armv7ve"