Eliminate CIndexer::getClangPath(), since libclang no longer depends

on the presence of a 'clang' executable. Simplify
CIndexer::getClangResourcesPath() a bit.

Patch up the CMake makefiles to install headers into two locations in
the build tree, for those silly cases where 'clang' will end up
looking into the wrong build directory for headers.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116260 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Headers/CMakeLists.txt

@@ -18,21 +18,20 @@ set(files
   tmmintrin.h
   xmmintrin.h)
 
-if (MSVC_IDE OR XCODE)
-  set(output_dir ${LLVM_BINARY_DIR}/bin/lib/clang/${CLANG_VERSION}/include)
-else ()
-  set(output_dir ${LLVM_BINARY_DIR}/lib/clang/${CLANG_VERSION}/include)
-endif ()
+set(output_dir ${LLVM_BINARY_DIR}/lib/${CMAKE_CFG_INTDIR}/clang/${CLANG_VERSION}/include)
+
+# If we are in an IDE that has a configuration directory, we need to
+# create a second copy of the headers so that 'clang' can find them if
+# it's run from the build directory.
+if(MSVC_IDE OR XCODE)
+   set(other_output_dir ${LLVM_BINARY_DIR}/bin/lib/clang/${CLANG_VERSION}/include)
+endif()
 
 # Generate arm_neon.h
 set(LLVM_TARGET_DEFINITIONS ${CLANG_SOURCE_DIR}/include/clang/Basic/arm_neon.td)
 tablegen(arm_neon.h.inc -gen-arm-neon)
 
-add_custom_command(OUTPUT ${output_dir}/arm_neon.h 
-  DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/arm_neon.h.inc
-  COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_BINARY_DIR}/arm_neon.h.inc ${output_dir}/arm_neon.h
-  COMMENT "Copying clang's arm_neon.h...")
-
+set(out_files)
 foreach( f ${files} )
   set( src ${CMAKE_CURRENT_SOURCE_DIR}/${f} )
   set( dst ${output_dir}/${f} )
@@ -40,10 +39,34 @@ foreach( f ${files} )
     DEPENDS ${src}
     COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
     COMMENT "Copying clang's ${f}...")
+  list(APPEND out_files ${dst})
+
+  if(other_output_dir)
+   set(other_dst ${other_output_dir}/${f})
+    add_custom_command(OUTPUT ${other_dst}
+      DEPENDS ${src}
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${other_dst}
+      COMMENT "Copying clang's ${f}...")    
+    list(APPEND out_files ${other_dst})
+  endif()
 endforeach( f )
 
-add_custom_target(clang-headers ALL
-  DEPENDS ${files} ${output_dir}/arm_neon.h)
+add_custom_command(OUTPUT ${output_dir}/arm_neon.h 
+  DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/arm_neon.h.inc
+  COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_BINARY_DIR}/arm_neon.h.inc ${output_dir}/arm_neon.h
+  COMMENT "Copying clang's arm_neon.h...")
+list(APPEND out_files ${output_dir}/arm_neon.h)
+
+if (other_output_dir)
+    set(other_dst ${other_output_dir}/arm_neon.h)
+    add_custom_command(OUTPUT ${other_dst}
+      DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/arm_neon.h.inc
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_BINARY_DIR}/arm_neon.h.inc ${other_dst}
+      COMMENT "Copying clang's arm_neon.h...")
+    list(APPEND out_files ${other_dst})
+endif ()
+
+add_custom_target(clang-headers ALL DEPENDS ${out_files})
 
 install(FILES ${files} ${output_dir}/arm_neon.h
   PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ

tools/libclang/CIndexer.cpp

@@ -39,12 +39,12 @@
 
 using namespace clang;
 
-const llvm::sys::Path& CIndexer::getClangPath() {
+std::string CIndexer::getClangResourcesPath() {
   // Did we already compute the path?
-  if (!ClangPath.empty())
-    return ClangPath;
+  if (!ResourcesPath.empty())
+    return ResourcesPath.str();
   
-  // Find the location where this library lives (libCIndex.dylib).
+  // Find the location where this library lives (libclang.dylib).
 #ifdef LLVM_ON_WIN32
   MEMORY_BASIC_INFORMATION mbi;
   char path[MAX_PATH];
@@ -52,46 +52,26 @@ const llvm::sys::Path& CIndexer::getClangPath() {
                sizeof(mbi));
   GetModuleFileNameA((HINSTANCE)mbi.AllocationBase, path, MAX_PATH);
   
-  llvm::sys::Path CIndexPath(path);
-
-  CIndexPath.eraseComponent();
-  CIndexPath.appendComponent("clang");
-  CIndexPath.appendSuffix("exe");
-  CIndexPath.makeAbsolute();
+  llvm::sys::Path LibClangPath(path);
+  LibClangPath.eraseComponent();
 #else
   // This silly cast below avoids a C++ warning.
   Dl_info info;
   if (dladdr((void *)(uintptr_t)clang_createTranslationUnit, &info) == 0)
     assert(0 && "Call to dladdr() failed");
   
-  llvm::sys::Path CIndexPath(info.dli_fname);
+  llvm::sys::Path LibClangPath(info.dli_fname);
   
   // We now have the CIndex directory, locate clang relative to it.
-  CIndexPath.eraseComponent();
-  CIndexPath.appendComponent("..");
-  CIndexPath.appendComponent("bin");
-  CIndexPath.appendComponent("clang");
+  LibClangPath.eraseComponent();
 #endif
   
+  LibClangPath.appendComponent("clang");
+  LibClangPath.appendComponent(CLANG_VERSION_STRING);
+
   // Cache our result.
-  ClangPath = CIndexPath;
-  return ClangPath;
-}
-
-std::string CIndexer::getClangResourcesPath() {
-  llvm::sys::Path P = getClangPath();
-
-  if (!P.empty()) {
-    P.eraseComponent();  // Remove /clang from foo/bin/clang
-    P.eraseComponent();  // Remove /bin   from foo/bin
-
-    // Get foo/lib/clang/<version>/include
-    P.appendComponent("lib");
-    P.appendComponent("clang");
-    P.appendComponent(CLANG_VERSION_STRING);
-  }
-
-  return P.str();
+  ResourcesPath = LibClangPath;
+  return LibClangPath.str();
 }
 
 static llvm::sys::Path GetTemporaryPath() {

tools/libclang/CIndexer.h

@@ -31,7 +31,7 @@ class CIndexer {
   bool OnlyLocalDecls;
   bool DisplayDiagnostics;
 
-  llvm::sys::Path ClangPath;
+  llvm::sys::Path ResourcesPath;
   
 public:
  CIndexer() : OnlyLocalDecls(false), DisplayDiagnostics(false) { }
@@ -47,9 +47,6 @@ public:
     DisplayDiagnostics = Display;
   }
 
-  /// \brief Get the path of the clang binary.
-  const llvm::sys::Path& getClangPath();
-  
   /// \brief Get the path of the clang resource files.
   std::string getClangResourcesPath();
 };