iPhone编译为拇指 [英] iPhone compile for thumb

问题描述

我知道在iPhone目标的设置中关闭编译缩略图可能是一个好主意，以提高性能。我有一些麻烦找到这个设置。因为我在当前的项目中找不到它，我决定创建一个新的（我可以找到并设置它），并将我的文件复制到它（并更新我同时使用的所有库）。

I've heard it might be a good idea to turn off "compile for thumb" in an iPhone target's settings to increase performance. I'm having some trouble finding this setting though. Since I couldn't find it in my current project, I decided to make a new one (where I could find and set it), and copy my files over to it (and also update all libs I'm using at the same time).

但现在似乎这个设置也从这个新项目disapperad也。无论我选择什么SDK，模拟器或设备，设置都不会显示在目标设置！我确实似乎仍然有一个变量名为GCC_THUMB_SUPPORT在类别用户定义突然。这是什么？

But now it seems like this setting has disapperad from this new project also. No matter what SDK I choose, simulator or device, the setting will not show up in the target settings! I do seem however to still have a variable called GCC_THUMB_SUPPORT under the category "User-defined" all of the sudden. What is this?

我尝试创建一个新的目标，但是设置不会显示在这里（甚至不是GCC_THUMB_SUPPORT）。

I tried making a new target, but the setting will not show up in that either (not even GCC_THUMB_SUPPORT).

推荐答案

GCC_THUMB_SUPPORT是正确的变量。只要将其设置为NO即可禁用THUMB代码生成。

THUMB的一般规则是，如果代码是浮点重载，则禁用它）

更多关于此处。

GCC_THUMB_SUPPORT is the right variable. Just set it to NO to disable THUMB code generation.
A general rule of THUMB is, to disable it if your code is floating point heavy :)
More about that here.

更新：

编译THUMB指令集的建议不再有效（实际上自iPhone 3GS起）。

Update:
The advice to compile for the THUMB instruction set is no longer valid (actually since the iPhone 3GS).

这篇关于iPhone编译为拇指的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！