问题描述
在我的iPhone项目，我有一个名为arm_asm_stub.S汇编文件，其中包含一个方法，我需要从另一个文件在我的项目叫main.c中调用当我不＃包括我的main.c文件的顶部的文件，我得到没有生成错误，但我得到的链接器错误：
In my iPhone project, I have an assembly file named arm_asm_stub.S, which contains a method I need to call from another file in my project called main.c. When I don't #include the file at the top of my main.c file, I get no build errors, but I do get the linker error:
Undefined symbols for architecture armv7:
"_execute_arm_translate", referenced from:
_iphone_main in main.o
然而，当我尝试＃包括该文件在main.c中的顶部，X code使用锵编译arm_asm_stub.S，所以我得到了一堆错误，那些中没有出现，当我不要将文件＃包括如：
However, when I attempt to #include the file at the top of main.c, Xcode uses Clang to compile arm_asm_stub.S and so I get a bunch of errors, ones that don't appear when I don't #include the file such as:
unknown type name 'ldr'
expected identifier or '('
use of undeclared identifier 'sp'
如何能X $ C $Ç比项目的其余部分单独编译此文件时？
How can Xcode compile this one file separately than the rest of the project?
推荐答案
您应该只是添加 .S 文件到您的项目和构建系统将自动组装。小心尽管符号。所有的C函数都被编译器ppended给他们一个下划线$ P $，所以你的汇编语言程序标签需要在前端对C code下划线才能够调用它。
You should just add the .S file to your project and the build system will automatically assemble it. Be careful with the symbols though. All C functions have an underscore prepended to them by the compiler, so your assembly language routine label needs an underscore at the front for C code to be able to call it.
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