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Tag Archives: compiler
Android NDK 宣佈向 Clang 靠攏...
在 Hacker News Daily 上看到 Android NDK 宣佈向 Clang 靠過去的消息：「Changelog for NDK Build 2490520」。 Android NDK 做為效能的加速手段而使用到 C 或是 C++，所以會使用對應的 compiler suite： The NDK is a toolset that allows you to implement parts of your app using native-code languages such … Continue reading
用統計方法反推 JavaScript 壓縮程式的變數名稱
JavaScript 在正式提供服務時一般都會使用「YUI Compressor」、「UglifyJS」或是「Closure Compiler」壓縮後再拿到正式環境上使用，最主要的目的是為了降低網路傳輸量。 這些工具其中一個特點是，local function 與 local variable 會被較短的名字取代掉，這可以讓想要反組譯的人比較麻煩。 不過今天看到的這個工具可以解決「困擾」：「JSNice」。(在 Slashdot 上的「Machine Learning Used For JavaScript Code De-obfuscation」這篇看到的) 用統計方法去「猜測」這些 local function 與 local variable 應該叫什麼名字，讓人比較好理解。官方對準確度的說法是超過 60%： In our experiments, we found JSNice to be effective for deobfuscating minified code. … Continue reading
Posted in Computer, Murmuring, Programming, Software
Tagged closure, code, compiler, compressor, function, google, javascript, local, source, uglifyjs, variable, yui
2 Comments
Go 的 self-boot 計畫
Go 的 self-boot 計畫，也就是用 Go compiler 編 Go compiler：「Russ Cox – porting the Go compiler from C to Go」。 其中提到： The goal is to convert *their* C code (not all C code). They want generated code to be human-readable and … Continue reading
Posted in Computer, Murmuring, Programming, Software
Tagged boot, c, compiler, go, self
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FreeBSD 預設的 compiler 從 GCC 換成 clang
FreeBSD 預設的 compiler (/usr/bin/cc、/usr/bin/c++ 與 /usr/bin/cpp) 從 GCC 4.2.1 換成 clang 了：「Revision 242624」。 目前只有 CURRENT 裡的 amd64 與 i386 版本換過去，如此一來，FreeBSD 10.0 會是第一個使用 clang 作為預設編輯器的正式版本 (看起來不像會 back port 回 FreeBSD 9)。接下來是 Ports 大混戰了，應該會有一卡車的 ports 用 USE_GCC=yes 來解？ 從 2009 年的努力到現在三年多了 (參考「[ANNOUNCE]: … Continue reading
clang 的進展...
在 OSnews 上看到 clang 2.8 與其他幾個 compiler 的比較：「Compiler Benchmarks of GCC, LLVM-GCC, DragonEgg, Clang」。 以測試結果來說，如果改用 Clang，有些會變得比較快，但也有些變得比較差。不過以 license 以及後勁來看，還蠻看好發展的。六月的時候在 FreeBSD 的 -HEAD 裡面變成 default compiler，預定 9.0-RELEASE 會是 FreeBSD 上第一個用 clang 的版本... (感謝 lwhsu 戳中)