Generate CMakeLists for convenient DevX in llvmDebugInfoC

^KT-63598

kotlin-native/llvmDebugInfoC/.gitignore

@@ -0,0 +1 @@
+CMakeLists.txt

kotlin-native/llvmDebugInfoC/README.md

@@ -0,0 +1,7 @@
+# Working on C++ code
+
+1. Generate CMakeLists.txt
+```
+./gradlew :kotlin-native:llvmDebugInfoC:generateCMakeLists
+```
+2. Open this directory in CLion

kotlin-native/llvmDebugInfoC/build.gradle.kts

@@ -23,9 +23,12 @@ plugins {
 
 native {
     val obj = if (HostManager.hostIsMingw) "obj" else "o"
+    val cxxStandard = 17
+    val llvmIncludeDir = "${llvmDir}/include"
+
     val cxxflags = mutableListOf(
-        "--std=c++17",
-        "-I${llvmDir}/include",
+        "--std=c++${cxxStandard}",
+        "-I${llvmIncludeDir}",
         "-I${projectDir}/src/main/include"
     )
     suffixes {
@@ -46,4 +49,26 @@ native {
         tool(*hostPlatform.clangForJni.llvmAr("").toTypedArray())
         flags("-qcv", ruleOut(), *ruleInAll())
     }
-}
+
+    // FIXME: Migrate to the compilation database approach when the clang calls are removed
+    tasks.register("generateCMakeLists") {
+        doLast {
+            projectDir.resolve("CMakeLists.txt").writeText(
+                """
+                cmake_minimum_required(VERSION 3.26)
+                project(llvmDebugInfoC)
+                
+                set(CMAKE_CXX_STANDARD ${cxxStandard})
+
+                include_directories(${llvmIncludeDir})
+                include_directories(src/main/include)
+                
+                add_library(
+                        llvmDebugInfoC
+                        src/main/cpp/DebugInfoC.cpp
+                )
+                """.trimIndent()
+            )
+        }
+    }
+}