Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -347,9 +347,14 @@
 option (LLVM_BUILD_EXTERNAL_COMPILER_RT
   "Build compiler-rt as an external project." OFF)
 
-option(LLVM_BUILD_LLVM_DYLIB "Build libllvm dynamic library" OFF)
-option(LLVM_DYLIB_EXPORT_ALL "Export all symbols from libLLVM.dylib (default is C API only" OFF)
-option(LLVM_DISABLE_LLVM_DYLIB_ATEXIT "Disable llvm-shlib's atexit destructors." ON)
+option(LLVM_LINK_LLVM_DYLIB "Link tools against the libllvm dynamic library" OFF)
+option(LLVM_BUILD_LLVM_DYLIB "Build libllvm dynamic library" ${LLVM_LINK_LLVM_DYLIB})
+option(LLVM_DYLIB_EXPORT_ALL "Export all symbols from libLLVM.dylib (default is C API only" ${LLVM_LINK_LLVM_DYLIB})
+set(LLVM_DISABLE_LLVM_DYLIB_ATEXIT_DEFAULT ON)
+if (LLVM_LINK_LLVM_DYLIB)
+  set(LLVM_DISABLE_LLVM_DYLIB_ATEXIT_DEFAULT OFF)
+endif()
+option(LLVM_DISABLE_LLVM_DYLIB_ATEXIT "Disable llvm-shlib's atexit destructors." ${LLVM_DISABLE_LLVM_DYLIB_ATEXIT_DEFAULT})
 if(LLVM_DISABLE_LLVM_DYLIB_ATEXIT)
   set(DISABLE_LLVM_DYLIB_ATEXIT 1)
 endif()
Index: cmake/modules/AddLLVM.cmake
===================================================================
--- cmake/modules/AddLLVM.cmake
+++ cmake/modules/AddLLVM.cmake
@@ -41,7 +41,7 @@
   # Assume that;
   #   - LLVM_COMPILE_FLAGS is list.
   #   - PROPERTY COMPILE_FLAGS is string.
-  string(REPLACE ";" " " target_compile_flags "${LLVM_COMPILE_FLAGS}")
+  string(REPLACE ";" " " target_compile_flags " ${LLVM_COMPILE_FLAGS}")
 
   if(update_src_props)
     foreach(fn ${sources})
@@ -444,10 +444,14 @@
   # property has been set to an empty value.
   get_property(lib_deps GLOBAL PROPERTY LLVMBUILD_LIB_DEPS_${name})
 
-  llvm_map_components_to_libnames(llvm_libs
-    ${ARG_LINK_COMPONENTS}
-    ${LLVM_LINK_COMPONENTS}
-    )
+  if (LLVM_LINK_LLVM_DYLIB AND NOT ARG_STATIC)
+    set(llvm_libs LLVM)
+  else()
+    llvm_map_components_to_libnames(llvm_libs
+      ${ARG_LINK_COMPONENTS}
+      ${LLVM_LINK_COMPONENTS}
+      )
+  endif()
 
   if(CMAKE_VERSION VERSION_LESS 2.8.12)
     # Link libs w/o keywords, assuming PUBLIC.
@@ -604,7 +608,11 @@
 
   set(EXCLUDE_FROM_ALL OFF)
   set_output_directory(${name} ${LLVM_RUNTIME_OUTPUT_INTDIR} ${LLVM_LIBRARY_OUTPUT_INTDIR})
-  llvm_config( ${name} ${LLVM_LINK_COMPONENTS} )
+  if (LLVM_LINK_LLVM_DYLIB)
+    target_link_libraries(${name} LLVM)
+  else()
+    llvm_config( ${name} ${LLVM_LINK_COMPONENTS} )
+  endif()
   if( LLVM_COMMON_DEPENDS )
     add_dependencies( ${name} ${LLVM_COMMON_DEPENDS} )
   endif( LLVM_COMMON_DEPENDS )
@@ -836,8 +844,13 @@
       set(cppflags "${cppflags} -I${d}")
     endforeach(d)
     set(ldflags "${CMAKE_EXE_LINKER_FLAGS}")
+    if (LLVM_LINK_LLVM_DYLIB)
+      set(linkmode "dylib")
+    else()
+      set(linkmode "component-libs")
+    endif()
     add_custom_command(OUTPUT ${binpath}
-      COMMAND ${CMAKE_BINARY_DIR}/bin/llvm-go "go=${GO_EXECUTABLE}" "cc=${cc}" "cxx=${cxx}" "cppflags=${cppflags}" "ldflags=${ldflags}"
+      COMMAND ${CMAKE_BINARY_DIR}/bin/llvm-go "go=${GO_EXECUTABLE}" "cc=${cc}" "cxx=${cxx}" "cppflags=${cppflags}" "ldflags=${ldflags}" "linkmode=${linkmode}"
               ${ARG_GOFLAGS} build -o ${binpath} ${pkgpath}
       DEPENDS llvm-config ${CMAKE_BINARY_DIR}/bin/llvm-go${CMAKE_EXECUTABLE_SUFFIX}
               ${llvmlibs} ${ARG_DEPENDS}
Index: cmake/modules/TableGen.cmake
===================================================================
--- cmake/modules/TableGen.cmake
+++ cmake/modules/TableGen.cmake
@@ -71,6 +71,7 @@
 endfunction()
 
 macro(add_tablegen target project)
+  set(LLVM_LINK_LLVM_DYLIB OFF) # dylib depends on tblgen
   set(${target}_OLD_LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS})
   set(LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS} TableGen)
 
Index: tools/llvm-config/CMakeLists.txt
===================================================================
--- tools/llvm-config/CMakeLists.txt
+++ tools/llvm-config/CMakeLists.txt
@@ -1,4 +1,5 @@
 set(LLVM_LINK_COMPONENTS support)
+set(LLVM_LINK_LLVM_DYLIB OFF)
 
 set(BUILDVARIABLES_SRCPATH ${CMAKE_CURRENT_SOURCE_DIR}/BuildVariables.inc.in)
 set(BUILDVARIABLES_OBJPATH ${CMAKE_CURRENT_BINARY_DIR}/BuildVariables.inc)
Index: tools/llvm-go/llvm-go.go
===================================================================
--- tools/llvm-go/llvm-go.go
+++ tools/llvm-go/llvm-go.go
@@ -24,6 +24,11 @@
 	"strings"
 )
 
+const (
+	linkmodeComponentLibs = "component-libs"
+	linkmodeDylib         = "dylib"
+)
+
 type pkg struct {
 	llvmpath, pkgpath string
 }
@@ -66,11 +71,12 @@
 func llvmConfig(args ...string) string {
 	configpath := os.Getenv("LLVM_CONFIG")
 	if configpath == "" {
-		// strip llvm-go, add llvm-config
-		configpath = os.Args[0][:len(os.Args[0])-7] + "llvm-config"
+		bin, _ := filepath.Split(os.Args[0])
+		configpath = filepath.Join(bin, "llvm-config")
 	}
 
 	cmd := exec.Command(configpath, args...)
+	cmd.Stderr = os.Stderr
 	out, err := cmd.Output()
 	if err != nil {
 		panic(err.Error())
@@ -78,11 +84,21 @@
 
 	outstr := string(out)
 	outstr = strings.TrimSuffix(outstr, "\n")
-	return strings.Replace(outstr, "\n", " ", -1)
+	outstr = strings.Replace(outstr, "\n", " ", -1)
+	return outstr
 }
 
-func llvmFlags() compilerFlags {
-	ldflags := llvmConfig(append([]string{"--ldflags", "--libs", "--system-libs"}, components...)...)
+func llvmFlags(linkmode string) compilerFlags {
+	ldflags := llvmConfig("--ldflags")
+	switch linkmode {
+	case linkmodeComponentLibs:
+		ldflags += " " + llvmConfig(append([]string{"--libs"}, components...)...)
+	case linkmodeDylib:
+		ldflags += " -lLLVM"
+	default:
+		panic("invalid linkmode: " + linkmode)
+	}
+	ldflags += " " + llvmConfig("--system-libs")
 	if runtime.GOOS != "darwin" {
 		// OS X doesn't like -rpath with cgo. See:
 		// https://code.google.com/p/go/issues/detail?id=7293
@@ -117,8 +133,8 @@
 	fmt.Println(strings.Join(components, " "))
 }
 
-func printConfig() {
-	flags := llvmFlags()
+func printConfig(linkmode string) {
+	flags := llvmFlags(linkmode)
 
 	fmt.Printf(`// +build !byollvm
 
@@ -137,7 +153,7 @@
 `, flags.cpp, flags.cxx, flags.ld)
 }
 
-func runGoWithLLVMEnv(args []string, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags string) {
+func runGoWithLLVMEnv(args []string, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags, linkmode string) {
 	args = addTag(args, "byollvm")
 
 	srcdir := llvmConfig("--src-root")
@@ -166,7 +182,7 @@
 	newgopathlist = append(newgopathlist, filepath.SplitList(os.Getenv("GOPATH"))...)
 	newgopath := strings.Join(newgopathlist, string(filepath.ListSeparator))
 
-	flags := llvmFlags()
+	flags := llvmFlags(linkmode)
 
 	newenv := []string{
 		"CC=" + cc,
@@ -178,7 +194,7 @@
 		"PATH=" + newpath,
 	}
 	if llgo != "" {
-		newenv = append(newenv, "GCCGO=" + llgo)
+		newenv = append(newenv, "GCCGO="+llgo)
 	}
 
 	for _, v := range os.Environ() {
@@ -234,45 +250,44 @@
 	ldflags := os.Getenv("CGO_LDFLAGS")
 	gocmd := "go"
 	llgo := ""
+	linkmode := linkmodeComponentLibs
+
+	flags := []struct {
+		name string
+		dest *string
+	}{
+		{"cc", &cc},
+		{"cxx", &cxx},
+		{"go", &gocmd},
+		{"llgo", &llgo},
+		{"cppflags", &cppflags},
+		{"ldflags", &ldflags},
+		{"linkmode", &linkmode},
+	}
 
 	args := os.Args[1:]
-	DONE: for {
-		switch {
-		case len(args) == 0:
+LOOP:
+	for {
+		if len(args) == 0 {
 			usage()
-		case strings.HasPrefix(args[0], "cc="):
-			cc = args[0][3:]
-			args = args[1:]
-		case strings.HasPrefix(args[0], "cxx="):
-			cxx = args[0][4:]
-			args = args[1:]
-		case strings.HasPrefix(args[0], "go="):
-			gocmd = args[0][3:]
-			args = args[1:]
-		case strings.HasPrefix(args[0], "llgo="):
-			llgo = args[0][5:]
-			args = args[1:]
-		case strings.HasPrefix(args[0], "cppflags="):
-			cppflags = args[0][9:]
-			args = args[1:]
-		case strings.HasPrefix(args[0], "cxxflags="):
-			cxxflags = args[0][9:]
-			args = args[1:]
-		case strings.HasPrefix(args[0], "ldflags="):
-			ldflags = args[0][8:]
-			args = args[1:]
-		default:
-			break DONE
 		}
+		for _, flag := range flags {
+			if strings.HasPrefix(args[0], flag.name+"=") {
+				*flag.dest = args[0][len(flag.name)+1:]
+				args = args[1:]
+				continue LOOP
+			}
+		}
+		break
 	}
 
 	switch args[0] {
 	case "build", "get", "install", "run", "test":
-		runGoWithLLVMEnv(args, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags)
+		runGoWithLLVMEnv(args, cc, cxx, gocmd, llgo, cppflags, cxxflags, ldflags, linkmode)
 	case "print-components":
 		printComponents()
 	case "print-config":
-		printConfig()
+		printConfig(linkmode)
 	default:
 		usage()
 	}
Index: tools/llvm-shlib/CMakeLists.txt
===================================================================
--- tools/llvm-shlib/CMakeLists.txt
+++ tools/llvm-shlib/CMakeLists.txt
@@ -8,33 +8,37 @@
 # LLVM components. All compoenent names handled by llvm-config are valid.
 
 if(NOT DEFINED LLVM_DYLIB_COMPONENTS)
-  set(LLVM_DYLIB_COMPONENTS
-    ${LLVM_TARGETS_TO_BUILD}
-    Analysis
-    BitReader
-    BitWriter
-    CodeGen
-    Core
-    DebugInfoDWARF
-    DebugInfoPDB
-    ExecutionEngine
-    IPO
-    IRReader
-    InstCombine
-    Instrumentation
-    Interpreter
-    Linker
-    MCDisassembler
-    MCJIT
-    ObjCARCOpts
-    Object
-    ScalarOpts
-    Support
-    Target
-    TransformUtils
-    Vectorize
-    native
-    )
+  if(LLVM_LINK_LLVM_DYLIB)
+    set(LLVM_DYLIB_COMPONENTS all)
+  else()
+    set(LLVM_DYLIB_COMPONENTS
+      ${LLVM_TARGETS_TO_BUILD}
+      Analysis
+      BitReader
+      BitWriter
+      CodeGen
+      Core
+      DebugInfoDWARF
+      DebugInfoPDB
+      ExecutionEngine
+      IPO
+      IRReader
+      InstCombine
+      Instrumentation
+      Interpreter
+      Linker
+      MCDisassembler
+      MCJIT
+      ObjCARCOpts
+      Object
+      ScalarOpts
+      Support
+      Target
+      TransformUtils
+      Vectorize
+      native
+      )
+  endif()
 endif()
 
 add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
@@ -45,6 +49,25 @@
 
 llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
 
+if(LLVM_DYLIB_COMPONENTS STREQUAL "all")
+  # libLLVM.so should not have any dependencies on any other LLVM
+  # shared libraries. When using the "all" pseudo-component,
+  # LLVM_AVAILABLE_LIBS is added to the dependencies, which may
+  # contain shared libraries (e.g. libLTO).
+  #
+  # Also exclude libLLVMTableGen for the following reasons:
+  #  - it is only used by internal *-tblgen utilities;
+  #  - it pollutes the global options space.
+  foreach(lib ${LIB_NAMES})
+    get_target_property(t ${lib} TYPE)
+    if("${lib}" STREQUAL "LLVMTableGen")
+    elseif("x${t}" STREQUAL "xSTATIC_LIBRARY")
+      list(APPEND FILTERED_LIB_NAMES ${lib})
+    endif()
+  endforeach()
+  set(LIB_NAMES ${FILTERED_LIB_NAMES})
+endif()
+
 if(NOT DEFINED LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
 
   if( WIN32 AND NOT CYGWIN )
@@ -56,44 +79,52 @@
 
   set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm.exports)
 
-  if (NOT LLVM_DYLIB_EXPORT_ALL)
-    foreach (lib ${LIB_NAMES})
-      set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
-      set(LIB_NAME ${LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib})
-      set(LIB_PATH ${LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX})
-      set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
-      list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
-
-      
-      add_custom_command(OUTPUT ${LIB_EXPORTS_PATH}
-        COMMAND nm ${LIB_PATH} | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_EXPORTS_PATH}
-        WORKING_DIRECTORY ${LIB_DIR}
-        DEPENDS ${lib}
-        COMMENT "Generating Export list for ${lib}..."
-        VERBATIM )
-    endforeach ()
+  if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
+    set(SYMBOL_PREFIX "_")
+  else()
+    set(SYMBOL_PREFIX "")
   endif()
 
   if (LLVM_DYLIB_EXPORT_ALL)
-    add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
-      COMMAND echo \"LLVM*\" > ${LLVM_EXPORTED_SYMBOL_FILE} && echo \"_Z*llvm*\" >> ${LLVM_EXPORTED_SYMBOL_FILE}
-      WORKING_DIRECTORY ${LIB_DIR}
-      DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
-      COMMENT "Generating combined export list...")
+    # We want all exported symbols. Undefined symbol (U) lines lack
+    # an address; filter them out by ensuring the type is preceded
+    # by non-whitespace.
+    set(NM_EXPORTED_SYMBOLS "^[^ ]+ [A-Z] ")
   else()
-    add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
-      COMMAND cat ${LLVM_DYLIB_REQUIRED_EXPORTS} > ${LLVM_EXPORTED_SYMBOL_FILE}
-      WORKING_DIRECTORY ${LIB_DIR}
-      DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
-      COMMENT "Generating combined export list...")
+    # We only want to export the LLVM C API.
+    set(NM_EXPORTED_SYMBOLS " T ${SYMBOL_PREFIX}LLVM")
   endif()
 
+  foreach (lib ${LIB_NAMES})
+    set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
+    set(LIB_NAME ${LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib})
+    set(LIB_PATH ${LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX})
+    set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
+    list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
+
+    add_custom_command(OUTPUT ${LIB_EXPORTS_PATH}
+      COMMAND nm ${LIB_PATH} | awk "/${NM_EXPORTED_SYMBOLS}/ { print $3 }" | sort -u | sed -e "s/^${SYMBOL_PREFIX}//g" > ${LIB_EXPORTS_PATH}
+      WORKING_DIRECTORY ${LIB_DIR}
+      DEPENDS ${lib}
+      COMMENT "Generating Export list for ${lib}..."
+      VERBATIM )
+  endforeach ()
+
+  add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
+    COMMAND cat ${LLVM_DYLIB_REQUIRED_EXPORTS} > ${LLVM_EXPORTED_SYMBOL_FILE}
+    WORKING_DIRECTORY ${LIB_DIR}
+    DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
+    COMMENT "Generating combined export list...")
+
   add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
 else()
   set(LLVM_EXPORTED_SYMBOL_FILE ${LLVM_DYLIB_EXPORTED_SYMBOL_FILE})
   add_custom_target(libLLVMExports DEPENDS ${LLVM_EXPORTED_SYMBOL_FILE})
 endif()
 
+# Don't try to link libLLVM.so against itself.
+set(LLVM_LINK_LLVM_DYLIB OFF)
+
 add_llvm_library(LLVM SHARED ${SOURCES})
 
 list(REMOVE_DUPLICATES LIB_NAMES)