Embedded Linux Conference 2014 day 3 #lfelc

koba @tetsu_koba

#lfelc Measuring tools: print, grab serial, bootgraph, bootchart

koba @tetsu_koba

SMPのブートは時間がかかるので、ブート時はmaxcpus=1にしておいて、ブートが完了してからsysfsでcpu個数を増やす。

Marta Rybczyńska @mrybczynska

#lfelc gnuradio talk: details on the porting to Linux on arm+dsp

koba @tetsu_koba

#lfelc mklibs: make minimum library for initram system

koba @tetsu_koba

#lfelc U-Boot falcon mode: SPL boots kernel directly, skipping big boot loader.

Joshua Lamorie @joshualamorie

Linux quick-boot: another reason to reduce kernel size. #lfelc

Drew Fustini 🐧 @pdp7

CodeFace: Framework & web frontend for analysing technical & social aspects of sw dev: http://t.co/8vLRCld5w2 via @linuxfoundation #lfelc

koba @tetsu_koba

エアコンの直撃を受けるところは寒すぎて死ぬ。。

Drew Fustini 🐧 @pdp7

CodeFace: web dashboard the pointy haired boss could love! slides: http://t.co/M3y4tuB6km via @linuxfoundation #lfelc http://t.co/79tzlvvWuj

拡大

koba @tetsu_koba

#lfelc SMP Bring Up On ARM SOCs - Gregory Clement

Drew Fustini 🐧 @pdp7

Remember headlines of Microsoft being top Linux contrib? CodeFace paints a diff picture! via @linuxfoundation #lfelc http://t.co/18jYxpaOaj

拡大

koba @tetsu_koba

#lfelc Here be Dragons: Using clang/LLVM to Build Android - Behan Webster, Converse in Code

koba @tetsu_koba

#lfelc LLVM is BSD-liike license. not GPL.

koba @tetsu_koba

#lfelc Clang is one of the Android NDK compilers. Renderscript in Andorid is based on LLVM.

koba @tetsu_koba

#lfelc LOCAL_CLANG=true in Android.mk to build a project by clang

koba @tetsu_koba

#lfelc wrapper to make clang look like the Android-style gcc compiler

koba @tetsu_koba

#lfelc Variable Length Arrays In Structs: used in skia(2D graphics library)

koba @tetsu_koba

Current status: Android をclangでビルドしたらビルド時間は90分から60分に短縮。でも起動しない。initやbionicに問題あるらしい。調査中。

koba @tetsu_koba

#lfelc LLVMLinux Project is working with Linaro.

Togetter公式🐤人気のツイートまとめを紹介🐤 @togetter_jp

.@tetsu_kobaさんの「Embedded Linux Conference 2014 day 3 #lfelc」に注目中！わたしチェック済み、あなたは？ http://t.co/R3xrbCLrU3

Marta Rybczyńska @mrybczynska

#lfelc My talk on Linux porting starts in less than an hour. Yay!

koba @tetsu_koba

#flelc BR2_EXTERNAL can point a directory that contains additional package recipes and defconfigs.

koba @tetsu_koba

#flelc BR2_EXTERNAL では既存のパッケージをOVERRIDEすることはできない。

koba @tetsu_koba

#flelc new web site and G+ page.

koba @tetsu_koba

並列ビルド。個々のパッケージは -j で並列化するが、パッケージ間では並列化してない。