找出哪个编译选项用于构建SQLite的方法 [英] Way to find out which Compilation Options were used to build SQLite

问题描述

在我的性能测试中，我发现了苹果在iPhone 3.0上提供的SQLite版本明显快于我自己编译的合并SQLite版本。所以我的问题是，有没有办法找出苹果使用哪些编译选项？

During my performance tests I found out the the SQLite version which Apple provides on the iPhone 3.0 is significantly faster then my self compiled amalgamation SQLite version. So my question is, is there a way to find out which compilation options Apple did use?

有一个测试应用程序打印出所有的默认设置pragam和sqlite3_config设置？

Is there a test app which prints out all the default set pragams and sqlite3_config setting?

推荐答案

看起来像pragma设置中唯一不同的是cache_size是默认2000，但在iPhone上是500 。

It looks like the only different in the pragma settings is the cache_size which is default 2000 but on the iPhone it is 500.

在某些系统上，可以使用以下命令读取编译器设置：
objdump --full-contents --section .GCC.command.line

On some systems it's possible to get read the compiler setting with this: objdump --full-contents --section .GCC.command.line

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