llvm

My program which JIT compiles a LLVM IR module and calls a function foo defined therein fails at runtime if foo uses an externally-defined function: LLVM ERROR: Program used external function 'glutInit' which could not be resolved! My program: // foo1.cpp #include <GL/glut.h> extern "C" void foo() { glutInit(0,0); } // foo2.cpp #include <iostream> #include <fstream> #include <string> #include <llvm/Support/raw_ostream.h> #include <llvm/LLVMContext.h> #include <llvm/Support/TargetSelect.h> #include <llvm/Support/IRReader.h> #include <llvm/ExecutionEngine/ExecutionEngine.h> #include <llvm

I'm trying to build and apply a pass on OSX using llvm 3.8. I installed llvm 3.8 using brew with this formula: $brew install llvm38 Inside the pass I have the following: static RegisterPass<SwiftPass> X("pass", "My Pass"); My Makefile to build the pass looks like this: LIB_NAME = pass$(SUFIX) LDFLAGS = $(shell $(LLVM_PATH)llvm-config --ldflags) CXXFLAGS = -g -Wall -fno-rtti -fPIC -std=c++11 -shared -dynamiclib $(shell $(LLVM_PATH)llvm-config --cxxflags --system-libs --libs core executionengine interpreter mc support nativecodegen) COMPILER = clang++ all: $(LIB_NAME) $(LIB_NAME): $(OBJ) $

In clang tidy, the check [llvm-header-guard] looks for LLVM style header guards, but I can't find any examples of proper LLVM header guard style, specifically the structure of the name given to the define, the coding standards pages does not mention anything. Looking at the unit tests: https://github.com/llvm-mirror/clang-tools-extra/blob/master/unittests/clang-tidy/LLVMModuleTest.cpp it seems to accept a few variations on the commonly used patterns. For a file named include/llvm/ADT/foo.h the convention seems to be: #ifndef LLVM_ADT_FOO_H #define LLVM_ADT_FOO_H //... #endif // LLVM_ADT_FOO_H

When I generate LLVM IR Code from C++, I can use the console command clang++ -emit-llvm –S test.cpp to get a test.ll file which is the LLVM IR I want. To get an executable these are the steps to follow: llvm-as test.ll -> gives me the test.bc file. llc test.bc --o test.s -> gives me the test.s file. clang++ test.s -o test.native -> gives me a native file that i can execute. For C++ this works just fine. In theory, should the same steps apply when I write Rust or Python Code? I take my Rust code and get the LLVM IR by typing rustc test.rs --emit llvm-ir . This gives me the test.ll file again.

I've been working through a tutorial on writing compilers with Flex, Bison, and LLVM (http://gnuu.org/2009/09/18/writing-your-own-toy-compiler/), and attempting to compile the final binary fails with many of the following "undefined reference" errors: g++ -o parser `llvm-config --libs core jit native --cxxflags --ldflags` *.cpp /tmp/ccl0CSyi.o: In function `NBinaryOperator::codeGen(CodeGenContext&)': codegen.cpp:(.text+0x2ce): undefined reference to `llvm::BinaryOperator::Create(llvm::Instruction::BinaryOps, llvm::Value*, llvm::Value*, llvm::Twine const&, llvm::BasicBlock*)' /tmp/ccl0CSyi.o:

I'm trying to add a metadata string to my LLVM module. The stripped down version of what I'm trying is #include <llvm/LLVMContext.h> #include <llvm/Module.h> #include <llvm/Metadata.h> using namespace llvm; int main() { Module* module = new Module("test", getGlobalContext()); MDString::get(module->getContext(), "test"); module->dump(); } I can compile and run it: Desktop% g++ llvm.cc -o llvm `llvm-config --cppflags --ldflags --libs all` Desktop% ./llvm ; ModuleID = 'test' But as one can see, the metadata does not show up. Can I somehow add the string to the module? The module itself only seems