[gccjit] fix build problems on llvm-18 and add github actions

.github/workflows/build.yml

@@ -0,0 +1,18 @@
+name: Build
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install build tools and libraries
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-14 g++-14 cmake ninja-build llvm-18-dev libmlir-18-dev libgccjit-14-dev
+
+      - name: Build
+        run: |
+          cmake -B build -G Ninja -DCMAKE_C_COMPILER=gcc-14 -DCMAKE_CXX_COMPILER=g++-14 .
+          cmake --build build

README.md

@@ -9,9 +9,10 @@ In general you need the following tools and libraries to build `mlir-gccjit`:
 - A working C++ compiler toolchain that supports C++20 standard.
 - [CMake] with minimum version 3.22.
 - [Ninja] build system (recommended but not mandatory).
-- [LLVM] libraries and development files.
-- [MLIR] libraries and development files.
-- [libgccjit] libraries and development files.
+- [LLVM] libraries and development files. For now we have only tested LLVM-18.
+- [MLIR] libraries and development files. For now we have only tested MLIR-18.
+- [libgccjit] libraries and development files. For now we have only tested
+  libgccjit-14.
 
 [CMake]: https://cmake.org/
 [Ninja]: https://ninja-build.org/
@@ -22,7 +23,7 @@ In general you need the following tools and libraries to build `mlir-gccjit`:
 For Ubuntu 24.04 (noble) users:
 
 ```bash
-apt-get install build-essential cmake ninja-build llvm-18-dev libmlir-18-dev libgccjit-13-dev
+apt-get install build-essential cmake ninja-build llvm-18-dev libmlir-18-dev libgccjit-14-dev
 ```
 
 ## Build

src/GCCJITOps.cpp

@@ -42,7 +42,6 @@
 #include "mlir/Support/LLVM.h"
 #include "mlir/Support/LogicalResult.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/Support/LogicalResult.h"
 
 using namespace mlir;
 using namespace mlir::gccjit;

src/Translation/Registration.cpp

@@ -21,7 +21,6 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/FileSystem.h"
-#include "llvm/Support/LogicalResult.h"
 #include "llvm/Support/MemoryBuffer.h"
 
 namespace mlir::gccjit {
@@ -38,15 +37,15 @@ dumpContextToTempfile(gcc_jit_context *ctxt, bool reproducer) {
   return file;
 }
 
-llvm::LogicalResult copyFileToStream(llvm::sys::fs::TempFile file,
-                                     llvm::raw_ostream &os) {
+LogicalResult copyFileToStream(llvm::sys::fs::TempFile file,
+                               llvm::raw_ostream &os) {
   os.flush();
   llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
       llvm::MemoryBuffer::getFile(file.TmpName);
   if (!buffer)
-    return mlir::failure();
+    return failure();
   os << buffer.get()->getBuffer();
-  return mlir::success();
+  return success();
 }
 
 void registerTranslation(llvm::StringRef name, llvm::StringRef desc,