llvm dev - Apr 2014 - [LLVMdev] Asking about how to debug Clang and LLVM?

Hi, everyone.


I scanned the documents listed in the website of LLVM, however, I can't find
information about how to debug the LLVM and Clang. As is known to all, the
"-g" option of GCC can help us to debug a program step by step. In the
configure file of LLVM, I can see the "-g -O2" option, but I have no
idea about what should I do to set up the debug mode. So I changed all the
options to "-g -O2" in order to trace the LLVM step by step. However,
my effort didn't work.


I suppose that the easiest way for us to understand a tool is to debug a program
step by step so that we can see how it works. Can anyone give some help on this?
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On 4/14/14 6:53 AM, 蜡笔小新 wrote:
> Hi, everyone.
>
> I scanned the documents listed in the website of LLVM, however, I 
> can't find information about how to debug the LLVM and Clang. As is 
> known to all, the "-g" option of GCC can help us to debug a
program
> step by step. In the configure file of LLVM, I can see the "-g
-O2"
> option, but I have no idea about what should I do to set up the debug 
> mode. So I changed all the options to "-g -O2" in order to trace
the
> LLVM step by step. However, my effort didn't work.
To compile Clang and LLVM with debugging symbols, you need to add the 
ENABLE_OPTIMIZED=0 option to the make command line; this will create 
what is called a Debug build:

make ENABLE_OPTIMIZED=0

All of the object files and tools will be placed in a Debug or 
Debug+Asserts directory.

More documentation on this can be found in the LLVM Getting Started Guide:

http://llvm.org/docs/GettingStarted.html#compiling-the-llvm-suite-source-code

Regards,

John Criswell

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