feat: add clang support to llvm-core Conan recipe

conanfile.py

@@ -352,6 +352,7 @@ def configure(self):
             self.options[llvm_core].with_z3 = False
             self.options[llvm_core].with_zstd = False
             self.options[llvm_core].with_ffi = False
+            self.options[llvm_core].with_clang = True
 
         if self.options.get_safe("enable_hdfs") and self.options.get_safe(
             "use_arrow_hdfs"

scripts/conan/patches/llvm-core-add-clang-support.patch

@@ -0,0 +1,72 @@
+diff --git a/recipes/llvm-core/all/conandata.yml b/recipes/llvm-core/all/conandata.yml
+index dd26cdba..bc4c16a9 100644
+--- a/recipes/llvm-core/all/conandata.yml
++++ b/recipes/llvm-core/all/conandata.yml
+@@ -6,6 +6,9 @@ sources:
+     "cmake":
+       url: https://github.com/llvm/llvm-project/releases/download/llvmorg-19.1.7/cmake-19.1.7.src.tar.xz
+       sha256: 11c5a28f90053b0c43d0dec3d0ad579347fc277199c005206b963c19aae514e3
++    "clang":
++      url: https://github.com/llvm/llvm-project/releases/download/llvmorg-19.1.7/clang-19.1.7.src.tar.xz
++      sha256: 11e5e4ecab5338b9914de3b83a4622cb200de466b7c56ba675afb72fa7d64675
+   "13.0.0":
+     url: https://github.com/llvm/llvm-project/releases/download/llvmorg-13.0.0/llvm-13.0.0.src.tar.xz
+     sha256: 408d11708643ea826f519ff79761fcdfc12d641a2510229eec459e72f8163020
+diff --git a/recipes/llvm-core/all/conanfile.py b/recipes/llvm-core/all/conanfile.py
+index e8290099..c6d1e93d 100644
+--- a/recipes/llvm-core/all/conanfile.py
++++ b/recipes/llvm-core/all/conanfile.py
+@@ -171,6 +171,7 @@ class LLVMCoreConan(ConanFile):
+         "with_xml2": [True, False],
+         "with_z3": [True, False],
+         "with_zstd": [True, False],
++        "with_clang": [True, False],
+     }
+     default_options = {
+         "shared": False,
+@@ -193,6 +194,7 @@ class LLVMCoreConan(ConanFile):
+         "with_z3": True,
+         "with_zlib": True,
+         "with_zstd": True,
++        "with_clang": False,
+     }
+
+     @property
+@@ -301,6 +303,8 @@ class LLVMCoreConan(ConanFile):
+             # LLVM >=15 split up several components in its release, including cmake
+             get(self, **sources["llvm"], destination='llvm-main', strip_root=True)
+             get(self, **sources["cmake"], destination='cmake', strip_root=True)
++            if "clang" in sources:
++                get(self, **sources["clang"], destination='clang', strip_root=True)
+
+     def _apply_resource_limits(self, cmake_definitions):
+         if os.getenv("CONAN_CENTER_BUILD_SERVICE"):
+@@ -373,6 +377,9 @@ class LLVMCoreConan(ConanFile):
+         if self.options.targets != "all":
+             cmake_variables["LLVM_TARGETS_TO_BUILD"] = self.options.targets
+
++        if self.options.with_clang:
++            cmake_variables["LLVM_ENABLE_PROJECTS"] = "clang"
++
+         self._apply_resource_limits(cmake_variables)
+
+         if is_msvc(self):
+@@ -415,7 +422,9 @@ class LLVMCoreConan(ConanFile):
+             "LLVMTableGenGlobalISel.*",
+             "CONAN_LIB.*",
+             "LLVMExegesis.*",
+-            "LLVMCFIVerify.*"
++            "LLVMCFIVerify.*",
++            "clang.*",
++            "libclang.*",
+         ]
+         graphviz_options = textwrap.dedent(f"""
+             set(GRAPHVIZ_EXECUTABLES OFF)
+@@ -547,3 +556,7 @@ class LLVMCoreConan(ConanFile):
+         else:
+             self.cpp_info.set_property("cmake_target_name", "LLVM")
+             self.cpp_info.libs = collect_libs(self)
++
++        if self.options.with_clang:
++            bindir = os.path.join(self.package_folder, "bin")
++            self.buildenv_info.prepend_path("PATH", bindir)