how to build my clang based tool

Clang Frontend
1

I would like to use the build system of llvm to build my tool that is based on clang.

I made a new directory under clang/tools with the name of the tool “polyextract”. I copied the CMakelist.txt and Makefile from the clang-cc and modified them
I then configure from llvm trunk and make, but unfortunately I only get the object file generated and no executable is generated in the Debug/bin

I would appreciate your help. Sorry I am not familiar with the build systems.

Attached are the files I modified

Thanks
Moataz

CMakeLists.txt (354 Bytes)

Makefile (1.05 KB)

2

I have managed to get it the executable generated by adding my directory to the Makefile in clang/tools directory.

So in general here is what I had to t do

  1. make a new directory with for the app
  2. copy and modify the makefile and CMakelists.txt
  3. add the subdirectory in the CMakelists.txt in clang/tools
  4. add the directory to the DIRS variable in clang/tools/Makefile

So the LLVM and Clang uses a mix of cmake and Makefiles? Can you give an abstract view of how the build process works?

Thanks,
Moataz

3

Hi Moataz,

I have managed to get it the executable generated by adding my directory
to the Makefile in clang/tools directory.

This is also what we do for our tool. Which reminds me that it would be
nice to have tools/Makefile and CMakeLists.txt automatically detect and
build additional tools. I'll suggest a patch.

So the LLVM and Clang uses a mix of cmake and Makefiles? Can you give an
abstract view of how the build process works?

LLVM can be built with either CMake or "../src/configure; make". They
are mostly equivalent.

Cheers, Axel.

4

The simple way is to use llvm/clang as static/shared libraries. You
can put your source files wherever you want, and write a Makefile
manually, like this:

INCLUDE = -I$(HOME)/llvm/include -I$(HOME)/llvm/tools/clang/include

CXXFLAGS = -g -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS \
           -fno-exceptions -fno-rtti \
           $(INCLUDE)

LIBS = -L$(HOME)/llvm/Debug/lib \
       -lclangFrontend \
       -lclangCodeGen \
       -lclangAnalysis \
       -lclangRewrite \
       -lclangSema \
       -lclangAST \
       -lclangParse \
       -lclangLex \
       -lclangBasic \
       -lclangIndex \
       -lLLVMBitWriter \
       -lLLVMAsmParser \
       -lLLVMArchive \
       -lLLVMBitReader \
       -lLLVMCore \
       -lLLVMSupport \
       -lLLVMSystem \
       -lLLVMCodeGen \
       -lLLVMAnalysis \
       -lLLVMTarget \
       -ldl -lpthread

HEADERS =

OBJS = foobar.o

foobar: $(OBJS) $(HEADERS)
  g++ -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -fno-exceptions -fno-rtti \
            -o $@ -g $(OBJS) $(LIBS)