LLVM IR with MakeFile

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#1

Hi LLVM Devs

I am not sure whether this is the right email to ask such kind of question. If not, please tell me the right mailing list.

I am new to llvm and I am going to use llvm to do some task related to program analysis. Now I would like to generate llvm IR.

I know that we can use the command like “clang -S -emit-llvm” to get the llvm IR.

However, I would like to have a makefile that can help me to generate the llvm IR.

For example, I am now compiling the coreutils. I use ./configure CC=/path/to/clang CFLAGS='-S -emit-llvm to try to generate the target makefile.It doesn’t work due to the following error
make[2]: *** No rule to make target lib/asnprintf.ll.ll', needed by lib/libcoreutils.a’. Stop.

I would like to use clang to cross compile the coreutils and the target architecture is ARM. For the purpose of program analysis, I would like to have the LLVM IR generated and also the dwarf information. Can anyone give me some suggestions. Thank you so much

Regards
Muhui

#2

Hi LLVM Devs

I am not sure whether this is the right email to ask such kind of question.
If not, please tell me the right mailing list.

I am new to llvm and I am going to use llvm to do some task related to
program analysis. Now I would like to generate llvm IR.

I know that we can use the command like "clang -S -emit-llvm" to get the
llvm IR.

However, I would like to have a makefile that can help me to generate the
llvm IR.

You don't really want a makefile based approach. Maintaining your own
makefiles won't scale to large projects. It's better to use the build
system of the existing project

For example, I am now compiling the coreutils. I use `./configure
CC=/path/to/clang CFLAGS='-S -emit-llvm` to try to generate the target
makefile.It doesn't work due to the following error
make[2]: *** No rule to make target `lib/asnprintf.ll.ll', needed by
`lib/libcoreutils.a'. Stop.

Try https://github.com/travitch/whole-program-llvm