使用cmake从llvm源目录开发llvm传递 [英] developing an llvm pass with cmake out of llvm source directory

问题描述

我试图在我的项目目录下开发一个llvm pass。为此，我遵循 http：// llvm中的信息.org / docs / CMake.html＃developing-llvm-pass-of-source 。我在这个链接中适当地创建我的CMakeFiles，我的最终项目目录是：

  |  -  src 
 | |  -  CMakeLists.txt 
 | |  -  bigForPass 
 | | |  -  CMakeLists.txt 
 | | |  -  bigForPass.cpp 
 | | |  -  merged.bc 
 | |  -  build 
  

我还将我的源文件与llvm根目录链接，没有任何问题。
最后，我在'build'文件夹下构建，我的共享库成功创建，没有问题（在build / bin文件夹下），名称为LLVMHello1.dylib。
然而，当我尝试使用命令运行我的通过merged.bc文件（其中包含我的llvm代码）

  opt -load ../build/bin/LLVMHello1.dylib -bishe_insert< merged.bc> final.bc 
  

我一直收到错误;

 打开'../build/bin/LLVMHello1.dylib'时出错：dlopen（../ build / bin / LLVMHello1.dylib，9）：未找到符号：__ZTIN4llvm10ModulePassE 
引用自：../build/bin/LLVMHello1.dylib 
预期在：flat命名空间
在../build/bin/LLVMHello1.dylib 
中 - 请求被忽略。有任何想法和建议对此赞赏吗？
 
 
 p>提前多谢。
解决方案
来自 http://www.jiang925.com/node/28  
 
 
未定义符号：_ZTIN4llvm12FunctionPassE LLVM主构建系统和用于构建
源代码的cmake支持之间存在不一致性
。 LLVM二进制文件构建时没有运行时类型info 
-fno-rtti。因此，源外传递必须以相同的方式构建
，否则选择将抱怨符号
_ZTIN4llvm12FunctionPassE未定义。
 
 
 
要解决这个问题，LLVM必须使用RTTI启用编译。添加
-DLLVM_REQUIRES_RTTI = 1到cmake，或添加REQUIRES_RTTI = 1来生成。
 
 
  SET（CMAKE_CXX_FLAGS-Wall -fno-rtti）到我的传递图书馆的CMakeLists.txt，然后它的工作。
 
I am trying to develop an llvm pass under my project directory. For that, I follow the info in http://llvm.org/docs/CMake.html#developing-llvm-pass-out-of-source. I create my CMakeFiles appropriately as in this link and my final project directory is like;
|-- src
|   |-- CMakeLists.txt
|   |-- bigForPass
|   |   |-- CMakeLists.txt
|   |   |-- bigForPass.cpp
|   |   |-- merged.bc
|   |-- build
I also linked my source files with llvm root directory without any problem.
Finally I make the build under the 'build' folder and my shared library is created successfully with no problems (under build/bin folder) with the name LLVMHello1.dylib. 
However, when I try to run my pass over merged.bc file (which contains my llvm code) with the command
opt -load ../build/bin/LLVMHello1.dylib -bishe_insert <merged.bc> final.bc
I keep getting the error;
Error opening '../build/bin/LLVMHello1.dylib': dlopen(../build/bin/LLVMHello1.dylib, 9): Symbol not found: __ZTIN4llvm10ModulePassE
  Referenced from: ../build/bin/LLVMHello1.dylib
  Expected in: flat namespace
 in ../build/bin/LLVMHello1.dylib
  -load request ignored.
Any ideas and suggestions on this appreciated ?

Thanks a lot in advance.
解决方案
from http://www.jiang925.com/node/28

  
Undefined Symbol: _ZTIN4llvm12FunctionPassE There is an inconsistency
  between LLVM main build system and the cmake support for building
  out-of-source. The LLVM binaries are built without runtime type info
  "-fno-rtti". Therefore, the out-of-source passes have to be built the
  same way otherwise opt will complain that symbol
  "_ZTIN4llvm12FunctionPassE" is undefined.
  
  
To solve this problem, LLVM must be compile with RTTI enabled. Add
  "-DLLVM_REQUIRES_RTTI=1" to cmake, or add "REQUIRES_RTTI=1" to make.
So I added SET(CMAKE_CXX_FLAGS "-Wall -fno-rtti") to CMakeLists.txt of my pass library and then it's working.

                        
这篇关于使用cmake从llvm源目录开发llvm传递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！