差分

この文書の現在のバージョンと選択したバージョンの差分を表示します。

--- mae3xx_devel:build_firmware:start [2014/03/19 10:36]
admin
+++ mae3xx_devel:build_firmware:start [2019/01/11 23:19] (現在)
admin
@@ ライン 1: / ライン 1: @@
+====== アップデート用ファームウェアの作成(クロス) ======
+"build_firm.sh" スクリプトにより、ファームウェアファイルを作ることができます。((root 権限での作業が必要です))\\
+スクリプト本体は、[[download_software:mae3xx:start|ダウンロード:MA-E3xxシリーズ]] にあります。
+<code>
+root@lubuntu-vpc:/home/user1# ./build_firm.sh
+MA-E3xx series Firmware build script
+usage: build_firm.sh -k kernel_dir -r rootfs dir [-o firmware_file]
+</code>
+引数として、下記を指定します。
+  * **-k** : カーネルソースを展開したディレクトリ
+  * **-r** : root filesystemのアーカイブ(([[download_software:mae3xx:start]] からダウンロードできます))を展開((root 権限での作業が必要です))したディレクトリ
+  * -o : 出力ファームウェアファイル名 (省略可: 省略時、カレントディレクトリに "firmware_YYYYMMDD_hhmmss.img" 形式で作成します)
+\\
+実行サンプルを示します。
+<code>
+root@lubuntu-vpc:/home/user1# ./build_firm.sh -k src/linux-kernel -r work/rootfs
+MA-E3xx series Firmware build script
+* kernelrelease: 3.14.0-rc7+
+  CHK     include/config/kernel.release
+  CHK     include/generated/uapi/linux/version.h
+  CHK     include/generated/utsrelease.h
+make[1]: `include/generated/mach-types.h' は更新済みです
+  CALL    scripts/checksyscalls.sh
+  CHK     include/generated/compile.h
+  SKIPPED include/generated/compile.h
+  CHK     kernel/config_data.h
+  Kernel: arch/arm/boot/Image is ready
+  Building modules, stage 2.
+  Kernel: arch/arm/boot/zImage is ready
+  MODPOST 178 modules
+  CHK     include/config/kernel.release
+  CHK     include/generated/uapi/linux/version.h
+  CHK     include/generated/utsrelease.h
+make[1]: `include/generated/mach-types.h' は更新済みです
+  CALL    scripts/checksyscalls.sh
+  CHK     include/generated/compile.h
+  SKIPPED include/generated/compile.h
+  CHK     kernel/config_data.h
+  Kernel: arch/arm/boot/Image is ready
+  Kernel: arch/arm/boot/zImage is ready
+  Image arch/arm/boot/uImage is ready
+* copying kernel image
+* copying DeviceTree blob
+* instal kernel modules to /home/user1/work/rootfs/lib/modules/3.14.0-rc7+
+  INSTALL drivers/crypto/omap-aes.ko
+  INSTALL drivers/crypto/omap-sham.ko
+  INSTALL drivers/misc/ti-st/st_drv.ko
+  INSTALL drivers/mtd/chips/map_ram.ko
+  INSTALL drivers/mtd/devices/block2mtd.ko
+  INSTALL drivers/mtd/devices/m25p80.ko
+  INSTALL drivers/mtd/devices/mtdram.ko
+  INSTALL drivers/mtd/maps/plat-ram.ko
+  INSTALL drivers/mtd/nand/nandsim.ko
+  INSTALL drivers/net/usb/asix.ko
+  INSTALL drivers/net/usb/ax88179_178a.ko
+  INSTALL drivers/net/usb/cdc_eem.ko
+  INSTALL drivers/net/usb/cdc_ether.ko
+  INSTALL drivers/net/usb/cdc_mbim.ko
+  INSTALL drivers/net/usb/cdc_ncm.ko
+  INSTALL drivers/rtc/rtc-omap.ko
+  INSTALL drivers/thermal/ti-soc-thermal/ti-soc-thermal.ko
+  INSTALL drivers/usb/class/cdc-wdm.ko
+  INSTALL lib/ts_bm.ko
+  INSTALL lib/ts_fsm.ko
+  INSTALL lib/ts_kmp.ko
+  INSTALL net/bridge/netfilter/ebt_802_3.ko
+  INSTALL net/bridge/netfilter/ebt_among.ko
+  INSTALL net/bridge/netfilter/ebt_arp.ko
+  INSTALL net/bridge/netfilter/ebt_arpreply.ko
+  INSTALL net/bridge/netfilter/ebt_dnat.ko
+  INSTALL net/bridge/netfilter/ebt_ip.ko
+  INSTALL net/bridge/netfilter/ebt_ip6.ko
+  INSTALL net/bridge/netfilter/ebt_limit.ko
+  INSTALL net/bridge/netfilter/ebt_log.ko
+  INSTALL net/bridge/netfilter/ebt_mark.ko
+  INSTALL net/bridge/netfilter/ebt_mark_m.ko
+  INSTALL net/bridge/netfilter/ebt_nflog.ko
+  INSTALL net/bridge/netfilter/ebt_pkttype.ko
+  INSTALL net/bridge/netfilter/ebt_redirect.ko
+  INSTALL net/bridge/netfilter/ebt_snat.ko
+  INSTALL net/bridge/netfilter/ebt_stp.ko
+  INSTALL net/bridge/netfilter/ebt_ulog.ko
+  INSTALL net/bridge/netfilter/ebt_vlan.ko
+  INSTALL net/bridge/netfilter/ebtable_filter.ko
+  INSTALL net/bridge/netfilter/ebtable_nat.ko
+  INSTALL net/bridge/netfilter/nf_tables_bridge.ko
+  INSTALL net/ipv4/netfilter/arp_tables.ko
+  INSTALL net/ipv4/netfilter/arpt_mangle.ko
+  INSTALL net/ipv4/netfilter/arptable_filter.ko
+  INSTALL net/ipv4/netfilter/ipt_CLUSTERIP.ko
+  INSTALL net/ipv4/netfilter/ipt_ECN.ko
+  INSTALL net/ipv4/netfilter/ipt_ah.ko
+  INSTALL net/ipv4/netfilter/ipt_rpfilter.ko
+  INSTALL net/ipv4/netfilter/iptable_raw.ko
+  INSTALL net/ipv4/netfilter/nf_nat_snmp_basic.ko
+  INSTALL net/ipv4/netfilter/nf_tables_arp.ko
+  INSTALL net/ipv4/netfilter/nf_tables_ipv4.ko
+  INSTALL net/ipv4/netfilter/nft_chain_nat_ipv4.ko
+  INSTALL net/ipv4/netfilter/nft_chain_route_ipv4.ko
+  INSTALL net/ipv4/netfilter/nft_reject_ipv4.ko
+  INSTALL net/ipv6/ah6.ko
+  INSTALL net/ipv6/esp6.ko
+  INSTALL net/ipv6/ip6_gre.ko
+  INSTALL net/ipv6/ip6_tunnel.ko
+  INSTALL net/ipv6/ipcomp6.ko
+  INSTALL net/ipv6/netfilter/ip6_tables.ko
+  INSTALL net/ipv6/netfilter/ip6t_MASQUERADE.ko
+  INSTALL net/ipv6/netfilter/ip6t_NPT.ko
+  INSTALL net/ipv6/netfilter/ip6t_REJECT.ko
+  INSTALL net/ipv6/netfilter/ip6t_SYNPROXY.ko
+  INSTALL net/ipv6/netfilter/ip6t_ah.ko
+  INSTALL net/ipv6/netfilter/ip6t_eui64.ko
+  INSTALL net/ipv6/netfilter/ip6t_frag.ko
+  INSTALL net/ipv6/netfilter/ip6t_hbh.ko
+  INSTALL net/ipv6/netfilter/ip6t_ipv6header.ko
+  INSTALL net/ipv6/netfilter/ip6t_mh.ko
+  INSTALL net/ipv6/netfilter/ip6t_rpfilter.ko
+  INSTALL net/ipv6/netfilter/ip6t_rt.ko
+  INSTALL net/ipv6/netfilter/ip6table_filter.ko
+  INSTALL net/ipv6/netfilter/ip6table_mangle.ko
+  INSTALL net/ipv6/netfilter/ip6table_nat.ko
+  INSTALL net/ipv6/netfilter/ip6table_raw.ko
+  INSTALL net/ipv6/netfilter/nf_conntrack_ipv6.ko
+  INSTALL net/ipv6/netfilter/nf_defrag_ipv6.ko
+  INSTALL net/ipv6/netfilter/nf_nat_ipv6.ko
+  INSTALL net/ipv6/netfilter/nf_tables_ipv6.ko
+  INSTALL net/ipv6/netfilter/nft_chain_nat_ipv6.ko
+  INSTALL net/ipv6/netfilter/nft_chain_route_ipv6.ko
+  INSTALL net/ipv6/netfilter/nft_reject_ipv6.ko
+  INSTALL net/ipv6/sit.ko
+  INSTALL net/ipv6/tunnel6.ko
+  INSTALL net/ipv6/xfrm6_mode_beet.ko
+  INSTALL net/ipv6/xfrm6_mode_ro.ko
+  INSTALL net/ipv6/xfrm6_mode_transport.ko
+  INSTALL net/ipv6/xfrm6_mode_tunnel.ko
+  INSTALL net/ipv6/xfrm6_tunnel.ko
+  INSTALL net/netfilter/ipset/ip_set_bitmap_ip.ko
+  INSTALL net/netfilter/ipset/ip_set_bitmap_ipmac.ko
+  INSTALL net/netfilter/ipset/ip_set_bitmap_port.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_ip.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_ipport.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_ipportip.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_ipportnet.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_net.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_netiface.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_netnet.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_netport.ko
+  INSTALL net/netfilter/ipset/ip_set_hash_netportnet.ko
+  INSTALL net/netfilter/ipset/ip_set_list_set.ko
+  INSTALL net/netfilter/nf_tables.ko
+  INSTALL net/netfilter/nf_tables_inet.ko
+  INSTALL net/netfilter/nft_compat.ko
+  INSTALL net/netfilter/nft_counter.ko
+  INSTALL net/netfilter/nft_ct.ko
+  INSTALL net/netfilter/nft_exthdr.ko
+  INSTALL net/netfilter/nft_hash.ko
+  INSTALL net/netfilter/nft_limit.ko
+  INSTALL net/netfilter/nft_log.ko
+  INSTALL net/netfilter/nft_meta.ko
+  INSTALL net/netfilter/nft_nat.ko
+  INSTALL net/netfilter/nft_queue.ko
+  INSTALL net/netfilter/nft_rbtree.ko
+  INSTALL net/netfilter/nft_reject.ko
+  INSTALL net/netfilter/nft_reject_inet.ko
+  INSTALL net/netfilter/xt_CHECKSUM.ko
+  INSTALL net/netfilter/xt_CLASSIFY.ko
+  INSTALL net/netfilter/xt_CT.ko
+  INSTALL net/netfilter/xt_DSCP.ko
+  INSTALL net/netfilter/xt_HL.ko
+  INSTALL net/netfilter/xt_HMARK.ko
+  INSTALL net/netfilter/xt_IDLETIMER.ko
+  INSTALL net/netfilter/xt_NETMAP.ko
+  INSTALL net/netfilter/xt_NFLOG.ko
+  INSTALL net/netfilter/xt_NFQUEUE.ko
+  INSTALL net/netfilter/xt_RATEEST.ko
+  INSTALL net/netfilter/xt_TCPMSS.ko
+  INSTALL net/netfilter/xt_TCPOPTSTRIP.ko
+  INSTALL net/netfilter/xt_TEE.ko
+  INSTALL net/netfilter/xt_TPROXY.ko
+  INSTALL net/netfilter/xt_TRACE.ko
+  INSTALL net/netfilter/xt_addrtype.ko
+  INSTALL net/netfilter/xt_bpf.ko
+  INSTALL net/netfilter/xt_cgroup.ko
+  INSTALL net/netfilter/xt_cluster.ko
+  INSTALL net/netfilter/xt_comment.ko
+  INSTALL net/netfilter/xt_connbytes.ko
+  INSTALL net/netfilter/xt_connlabel.ko
+  INSTALL net/netfilter/xt_connlimit.ko
+  INSTALL net/netfilter/xt_conntrack.ko
+  INSTALL net/netfilter/xt_cpu.ko
+  INSTALL net/netfilter/xt_dccp.ko
+  INSTALL net/netfilter/xt_devgroup.ko
+  INSTALL net/netfilter/xt_dscp.ko
+  INSTALL net/netfilter/xt_ecn.ko
+  INSTALL net/netfilter/xt_esp.ko
+  INSTALL net/netfilter/xt_hashlimit.ko
+  INSTALL net/netfilter/xt_helper.ko
+  INSTALL net/netfilter/xt_hl.ko
+  INSTALL net/netfilter/xt_iprange.ko
+  INSTALL net/netfilter/xt_length.ko
+  INSTALL net/netfilter/xt_limit.ko
+  INSTALL net/netfilter/xt_mac.ko
+  INSTALL net/netfilter/xt_multiport.ko
+  INSTALL net/netfilter/xt_nfacct.ko
+  INSTALL net/netfilter/xt_osf.ko
+  INSTALL net/netfilter/xt_owner.ko
+  INSTALL net/netfilter/xt_physdev.ko
+  INSTALL net/netfilter/xt_pkttype.ko
+  INSTALL net/netfilter/xt_policy.ko
+  INSTALL net/netfilter/xt_quota.ko
+  INSTALL net/netfilter/xt_rateest.ko
+  INSTALL net/netfilter/xt_realm.ko
+  INSTALL net/netfilter/xt_recent.ko
+  INSTALL net/netfilter/xt_sctp.ko
+  INSTALL net/netfilter/xt_set.ko
+  INSTALL net/netfilter/xt_socket.ko
+  INSTALL net/netfilter/xt_state.ko
+  INSTALL net/netfilter/xt_statistic.ko
+  INSTALL net/netfilter/xt_string.ko
+  INSTALL net/netfilter/xt_tcpmss.ko
+  INSTALL net/netfilter/xt_time.ko
+  INSTALL net/netfilter/xt_u32.ko
+  DEPMOD  3.14.0-rc7+
+合計 120
+lrwxrwxrwx 1 root root    28  3月 19 10:19 build -> /home/user1/src/linux-kernel
+drwxr-xr-x 5 root root  4096  3月 19 10:19 kernel
+-rw-r--r-- 1 root root 13800  3月 19 10:19 modules.alias
+-rw-r--r-- 1 root root 20113  3月 19 10:19 modules.alias.bin
+-rw-r--r-- 1 root root 11658  3月 19 10:19 modules.builtin
+-rw-r--r-- 1 root root 14344  3月 19 10:19 modules.builtin.bin
+-rw-r--r-- 1 root root  8612  3月 19 10:19 modules.dep
+-rw-r--r-- 1 root root 15376  3月 19 10:19 modules.dep.bin
+-rw-r--r-- 1 root root    52  3月 19 10:19 modules.devname
+-rw-r--r-- 1 root root  6680  3月 19 10:19 modules.order
+-rw-r--r-- 1 root root   131  3月 19 10:19 modules.softdep
+-rw-r--r-- 1 root root  2764  3月 19 10:19 modules.symbols
+-rw-r--r-- 1 root root  3735  3月 19 10:19 modules.symbols.bin
+lrwxrwxrwx 1 root root    28  3月 19 10:19 source -> /home/user1/src/linux-kernel
+Parallel mksquashfs: Using 4 processors
+Creating 4.0 filesystem on /home/user1/build_1395191930/kmod.img, block size 131072.
+[=============================================================================================|] 189/189 100%
+Exportable Squashfs 4.0 filesystem, xz compressed, data block size 131072
+	compressed data, compressed metadata, compressed fragments, compressed xattrs
+	duplicates are removed
+Filesystem size 422.11 Kbytes (0.41 Mbytes)
+.28% of uncompressed filesystem size (1894.33 Kbytes)
+Inode table size 1506 bytes (1.47 Kbytes)
+.68% of uncompressed inode table size (6946 bytes)
+Directory table size 2074 bytes (2.03 Kbytes)
+.61% of uncompressed directory table size (4756 bytes)
+Number of duplicate files found 0
+Number of inodes 217
+Number of files 189
+Number of fragments 17
+Number of symbolic links  0
+Number of device nodes 0
+Number of fifo nodes 0
+Number of socket nodes 0
+Number of directories 28
+Number of ids (unique uids + gids) 1
+Number of uids 1
+	root (0)
+Number of gids 1
+	root (0)
+Parallel mksquashfs: Using 4 processors
+Creating 4.0 filesystem on /home/user1/build_1395191930/rootfs.img, block size 1048576.
+[=========================================================================================-] 13028/13028 100%
+Exportable Squashfs 4.0 filesystem, xz compressed, data block size 1048576
+	compressed data, compressed metadata, compressed fragments, compressed xattrs
+	duplicates are removed
+Filesystem size 54833.49 Kbytes (53.55 Mbytes)
+.27% of uncompressed filesystem size (217001.19 Kbytes)
+Inode table size 160688 bytes (156.92 Kbytes)
+.11% of uncompressed inode table size (666530 bytes)
+Directory table size 156848 bytes (153.17 Kbytes)
+.79% of uncompressed directory table size (375353 bytes)
+Number of duplicate files found 477
+Number of inodes 18471
+Number of files 13019
+Number of fragments 139
+Number of symbolic links  4034
+Number of device nodes 0
+Number of fifo nodes 0
+Number of socket nodes 0
+Number of directories 1418
+Number of ids (unique uids + gids) 18
+Number of uids 8
+	root (0)
+	kikuchi (1000)
+	libuuid (100)
+	dnsmasq (104)
+	syslog (101)
+	ntp (105)
+	www-data (33)
+	usbmux (103)
+Number of gids 16
+	root (0)
+	dip (30)
+	shadow (42)
+	kikuchi (1000)
+	users (100)
+	netdev (102)
+	mail (8)
+	utmp (43)
+	syslog (104)
+	tty (5)
+	staff (50)
+	libuuid (101)
+	fuse (105)
+	nogroup (65534)
+	ssl-cert (107)
+	adm (4)
+* create initramfs ...
+update-initramfs: Generating /boot/initrd.img-3.14.0-rc7+
+/bin/df: Warning: cannot read table of mounted file systems: No such file or directory
+warning: failed to read mtab
+  adding: kernel.img (stored 0%)
+  adding: kmod.img (stored 0%)
+  adding: initramfs.img (stored 0%)
+  adding: rootfs.img (stored 0%)
+  adding: dtb.img (deflated 78%)
+* Firmware filename: /home/user1/firmware_20140319_102118.img
+done.
+please remove working directory '/home/user1/build_1395191930' manually.
+root@lubuntu-vpc:/home/user1#
+</code>
+\\
+できあがったファームウェアファイルは以下のとおりです。
+<code>
+root@lubuntu-vpc:/home/user1# ls -l /home/user1/firmware_20140319_102118.img
+-rw-r--r-- 1 root root 61781549  3月 19 10:21 /home/user1/firmware_20140319_102118.img
+</code>
+\\
+ファームウェアファイルはZIPアーカイブ形式となっています。\\
+内容は下記のとおりとなっています。
+<code>
+root@lubuntu-vpc:/home/user1# unzip -v firmware_20140319_102118.img
+Archive:  firmware_20140319_102118.img
+ Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
+--------  ------  ------- ---- ---------- ----- --------  ----
+ 3431840  Stored  3431840   0% 2014-03-19 10:19 d27c200d  kernel.img
+  Stored   434176   0% 2014-03-19 10:19 2b8250dd  kmod.img
+ 1754748  Stored  1754748   0% 2014-03-19 10:21 481c2b99  initramfs.img
+56152064  Stored 56152064   0% 2014-03-19 10:20 4f4a0761  rootfs.img
+  Defl:N     7963  78% 2014-03-19 10:19 336cb54e  dtb.img
+--------          -------  ---                            -------
+61808828         61780791   0%                            5 files
+root@lubuntu-vpc:/home/user1#
+</code>
+\\
+===== カスタマイズ =====
+==== カーネルコンフィグのカスタマイズ ====
+カーネルソースのディレクトリに ".config" ファイルがない場合、デフォルトのコンフィグを使用します。\\
+組み込むドライバを変更するなどのカスタマイズは、"build_firm" スクリプト実行前に "make menuconfig" などで\\
+実行しておいてください。
+{{:mae3xx_devel:build_firmware:make_menuconfig.png|make menuconfig}}
+\\
+==== ファイルシステムのカスタマイズ ====
+ターゲット用ファイルシステムのカスタマイズ (パッケージ追加など) を行い、ファームウェアにすることも可能です。\\
+[[mae3xx_devel:chroot_qemu:start]] を参照してください。
+\\
+===== TIPS =====
+==== ファームウェア容量の削減 ====
+v2.5.0 あたりから、Python 起動高速化のため、module のキャッシュをファームウェアに含めています (__pycache__ ディレクトリ)。\\
+これが原因で追加パッケージ類が容量オーバーで入らなくなった場合、キャッシュを削除することで4MB程度容量を稼ぐことが可能です。
+<code>
+# find mae320_trusty_rootfs/usr -name __pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/urllib/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/ctypes/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/email/mime/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/email/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/wsgiref/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/plat-arm-linux-gnueabihf/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/concurrent/futures/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/concurrent/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/idlelib/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/unittest/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/curses/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/multiprocessing/dummy/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/multiprocessing/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/pydoc_data/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/json/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/xmlrpc/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/logging/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/xml/parsers/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/xml/etree/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/xml/dom/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/xml/sax/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/xml/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/encodings/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/dbm/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/importlib/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/sqlite3/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/test/support/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/test/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/lib2to3/fixes/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/lib2to3/pgen2/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/lib2to3/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/tkinter/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/http/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/collections/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/venv/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/asyncio/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/html/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/distutils/command/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/distutils/__pycache__
+mae320_trusty_rootfs/usr/lib/python3.4/__pycache__
+</code>
+\\
+__pycache__ ディレクトリ以下を削除します。
+<code>
+# find mae320_trusty_rootfs/usr -name __pycache__ | xargs rm -rf
+</code>
+\\
+削除前・後での rootfs.img の容量は下記のようになります。
+  * 削除前
+<code>
+ 63057920  2016-10-03 10:20   rootfs.img
+</code>
+  * 削除後
+<code>
+ 59187200  2016-10-04 09:45   rootfs.img
+</code>

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