cmake: Look for clang at configure time

CMakeLists.txt

@@ -1,14 +1,18 @@
 cmake_minimum_required (VERSION 2.6)
 project (ClangLazy)
 
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake)
+find_package(Clang 3.6 MODULE REQUIRED)
+include_directories(${CLANG_INCLUDE_DIRS})
+
 set( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin )
 set( CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib )
 set( CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib )
 
 add_definitions (-D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS)
 add_definitions (-D_GNU_SOURCE -DHAVE_CLANG_CONFIG_H)
 
-set (LLVM_INSTALL_PREFIX /data/prefix/)
+set (LLVM_INSTALL_PREFIX ${CMAKE_INSTALL_PREFIX})
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fPIC -fno-common -Woverloaded-virtual -Wcast-qual -fno-strict-aliasing -pedantic -Wno-long-long -Wall -W -Wno-unused-parameter -Wwrite-strings -fno-exceptions -fno-rtti")
 set (CMAKE_MODULE_LINKER_FLAGS "-Wl,-flat_namespace -Wl,-undefined -Wl,suppress")

cmake/FindClang.cmake

@@ -0,0 +1,108 @@
+# Detect Clang libraries
+#
+# Defines the following variables:
+#  CLANG_FOUND                 - True if Clang was found
+#  CLANG_INCLUDE_DIR           - Where to find Clang includes
+#  CLANG_LIBRARY_DIR           - Where to find Clang libraries
+#
+#  CLANG_CLANG_LIB             - LibClang library
+#  CLANG_CLANGFRONTEND_LIB     - Clang Frontend Library
+#  CLANG_CLANGDRIVER_LIB       - Clang Driver Library
+#  ...
+#
+# Uses the same include and library paths detected by FindLLVM.cmake
+#
+# See http://clang.llvm.org/docs/InternalsManual.html for full list of libraries
+
+#=============================================================================
+# Copyright 2014 Kevin Funk <[email protected]>
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+
+#=============================================================================
+
+if(${Clang_FIND_REQUIRED})
+  set(LLVM_FIND_TYPE REQUIRED)
+else()
+  set(LLVM_FIND_TYPE OPTIONAL)
+endif()
+
+find_package(LLVM CONFIG ${LLVM_FIND_TYPE} QUIET)
+# if(NOT LLVM_FOUND)
+#   find_package(LLVM 3.4 CONFIG ${LLVM_FIND_TYPE} QUIET)
+# endif()
+# if(NOT LLVM_FOUND)
+#   find_package(LLVM 3.5 CONFIG ${LLVM_FIND_TYPE} QUIET)
+# endif()
+# if(NOT LLVM_FOUND)
+#   find_package(LLVM 3.6 CONFIG ${LLVM_FIND_TYPE} QUIET)
+# endif()
+
+set(Clang_FOUND FALSE)
+
+if(NOT TARGET llvm-config)
+  message(STATUS "LLVM was not found -> cannot find clang")
+  return()
+endif()
+
+set(CLANG_LIBRARY_DIR ${LLVM_LIBRARY_DIRS})
+set(CLANG_INCLUDE_DIR ${LLVM_INCLUDE_DIRS})
+
+macro(FIND_AND_ADD_CLANG_LIB _libname_)
+  string(TOUPPER ${_libname_} _prettylibname_)
+  find_library(CLANG_${_prettylibname_}_LIB NAMES "clang${_libname_}" HINTS ${LLVM_LIBRARY_DIRS})
+  if(CLANG_${_prettylibname_}_LIB)
+    add_library(Clang::${_libname_} UNKNOWN IMPORTED)
+    set_property(TARGET Clang::${_libname_} PROPERTY IMPORTED_LOCATION "${CLANG_${_prettylibname_}_LIB}")
+    set_property(TARGET Clang::${_libname_} PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${CLANG_INCLUDE_DIR})
+
+    set(CLANG_LIBS ${CLANG_LIBS} ${CLANG_${_prettylibname_}_LIB})
+  endif()
+endmacro(FIND_AND_ADD_CLANG_LIB)
+
+FIND_AND_ADD_CLANG_LIB(Frontend)
+FIND_AND_ADD_CLANG_LIB(Driver)
+FIND_AND_ADD_CLANG_LIB(CodeGen)
+FIND_AND_ADD_CLANG_LIB(Sema)
+FIND_AND_ADD_CLANG_LIB(Checker)
+FIND_AND_ADD_CLANG_LIB(Analysis)
+FIND_AND_ADD_CLANG_LIB(Rewrite)
+FIND_AND_ADD_CLANG_LIB(AST)
+FIND_AND_ADD_CLANG_LIB(Parse)
+FIND_AND_ADD_CLANG_LIB(Lex)
+FIND_AND_ADD_CLANG_LIB(Basic)
+FIND_AND_ADD_CLANG_LIB(ARCMigrate)
+FIND_AND_ADD_CLANG_LIB(Edit)
+FIND_AND_ADD_CLANG_LIB(FrontendTool)
+FIND_AND_ADD_CLANG_LIB(Serialization)
+FIND_AND_ADD_CLANG_LIB(Tooling)
+FIND_AND_ADD_CLANG_LIB(ToolingCore)
+FIND_AND_ADD_CLANG_LIB(StaticAnalyzerCheckers)
+FIND_AND_ADD_CLANG_LIB(StaticAnalyzerCore)
+FIND_AND_ADD_CLANG_LIB(StaticAnalyzerFrontend)
+FIND_AND_ADD_CLANG_LIB(RewriteCore)
+FIND_AND_ADD_CLANG_LIB(ASTMatchers)
+
+if(CLANG_LIBS)
+  set(Clang_FOUND TRUE)
+  set(Clang_VERSION ${LLVM_VERSION})
+
+else()
+  message(STATUS "Could not find any Clang libraries in ${LLVM_LIBRARY_DIR}")
+endif()
+
+if(Clang_FOUND)
+  message(STATUS "Found Clang (LLVM version: ${LLVM_VERSION})")
+  message(STATUS "  Include dirs:  ${CLANG_INCLUDE_DIR}")
+  message(STATUS "  Library dir:  ${CLANG_LIBRARY_DIR}")
+  message(STATUS "  Libraries:     ${CLANG_LIBS}")
+else()
+  if(Clang_FIND_REQUIRED)
+    message(FATAL_ERROR "Could NOT find Clang")
+  endif()
+endif()