8019470: Changes needed to compile JDK 8 on MacOS with clang compiler

Reviewed-by: erikj, ihse

common/autoconf/flags.m4

@@ -133,6 +133,26 @@ AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_LIBS],
     C_FLAG_REORDER=''
     CXX_FLAG_REORDER=''
 
+    if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+      # Linking is different on MacOSX
+      SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $PICFLAG"
+      SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker @loader_path/.'
+      SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
+      SET_SHARED_LIBRARY_NAME='-Xlinker -install_name -Xlinker @rpath/[$]1'
+      SET_SHARED_LIBRARY_MAPFILE=''
+    else
+      # Default works for linux, might work on other platforms as well.
+      SHARED_LIBRARY_FLAGS='-shared'
+      SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker \$$$$ORIGIN[$]1'
+      SET_SHARED_LIBRARY_ORIGIN="-Xlinker -z -Xlinker origin $SET_EXECUTABLE_ORIGIN"
+      SET_SHARED_LIBRARY_NAME='-Xlinker -soname=[$]1'
+      SET_SHARED_LIBRARY_MAPFILE='-Xlinker -version-script=[$]1'
+    fi
+  elif test "x$TOOLCHAIN_TYPE" = xclang; then
+    PICFLAG=''
+    C_FLAG_REORDER=''
+    CXX_FLAG_REORDER=''
+
     if test "x$OPENJDK_TARGET_OS" = xmacosx; then
       # Linking is different on MacOSX
       SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $PICFLAG"
@@ -242,6 +262,8 @@ AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION],
   # Generate make dependency files
   if test "x$TOOLCHAIN_TYPE" = xgcc; then
     C_FLAG_DEPS="-MMD -MF"
+  elif test "x$TOOLCHAIN_TYPE" = xclang; then
+    C_FLAG_DEPS="-MMD -MF"
   elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
     C_FLAG_DEPS="-xMMD -xMF"
   elif test "x$TOOLCHAIN_TYPE" = xxlc; then
@@ -260,6 +282,9 @@ AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION],
       CFLAGS_DEBUG_SYMBOLS="-g"
       CXXFLAGS_DEBUG_SYMBOLS="-g"
     fi
+  elif test "x$TOOLCHAIN_TYPE" = xclang; then
+    CFLAGS_DEBUG_SYMBOLS="-g"
+    CXXFLAGS_DEBUG_SYMBOLS="-g"
   elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
     CFLAGS_DEBUG_SYMBOLS="-g -xs"
     CXXFLAGS_DEBUG_SYMBOLS="-g0 -xs"
@@ -315,6 +340,20 @@ AC_DEFUN_ONCE([FLAGS_SETUP_COMPILER_FLAGS_FOR_OPTIMIZATION],
         C_O_FLAG_NORM="-O2"
         C_O_FLAG_NONE="-O0"
       fi
+    elif test "x$TOOLCHAIN_TYPE" = xclang; then
+      if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+        # On MacOSX we optimize for size, something
+        # we should do for all platforms?
+        C_O_FLAG_HIGHEST="-Os"
+        C_O_FLAG_HI="-Os"
+        C_O_FLAG_NORM="-Os"
+        C_O_FLAG_NONE=""
+      else
+        C_O_FLAG_HIGHEST="-O3"
+        C_O_FLAG_HI="-O3"
+        C_O_FLAG_NORM="-O2"
+        C_O_FLAG_NONE="-O0"
+      fi
     elif test "x$TOOLCHAIN_TYPE" = xxlc; then
       C_O_FLAG_HIGHEST="-O3"
       C_O_FLAG_HI="-O3 -qstrict"

common/autoconf/generated-configure.sh

@@ -4221,7 +4221,7 @@ TOOLCHAIN_DESCRIPTION_xlc="IBM XL C/C++"
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1394011255
+DATE_WHEN_GENERATED=1394150589
 
 ###############################################################################
 #
@@ -26297,8 +26297,28 @@ fi
   # Use indirect variable referencing
   toolchain_var_name=VALID_TOOLCHAINS_$OPENJDK_BUILD_OS
   VALID_TOOLCHAINS=${!toolchain_var_name}
+
+  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    # On Mac OS X, default toolchain to clang after Xcode 5
+    XCODE_VERSION_OUTPUT=`xcodebuild -version 2>&1 | $HEAD -n 1`
+    $ECHO "$XCODE_VERSION_OUTPUT" | $GREP "Xcode " > /dev/null
+    if test $? -ne 0; then
+      as_fn_error $? "Failed to determine Xcode version." "$LINENO" 5
+    fi
+    XCODE_MAJOR_VERSION=`$ECHO $XCODE_VERSION_OUTPUT | \
+        $SED -e 's/^Xcode \([1-9][0-9.]*\)/\1/' | \
+        $CUT -f 1 -d .`
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Xcode major version: $XCODE_MAJOR_VERSION" >&5
+$as_echo "$as_me: Xcode major version: $XCODE_MAJOR_VERSION" >&6;}
+    if test $XCODE_MAJOR_VERSION -ge 5; then
+        DEFAULT_TOOLCHAIN="clang"
+    else
+        DEFAULT_TOOLCHAIN="gcc"
+    fi
+  else
     # First toolchain type in the list is the default
     DEFAULT_TOOLCHAIN=${VALID_TOOLCHAINS%% *}
+  fi
 
   if test "x$with_toolchain_type" = xlist; then
     # List all toolchains
@@ -41221,6 +41241,26 @@ $as_echo "$ac_cv_c_bigendian" >&6; }
     C_FLAG_REORDER=''
     CXX_FLAG_REORDER=''
 
+    if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+      # Linking is different on MacOSX
+      SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $PICFLAG"
+      SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker @loader_path/.'
+      SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
+      SET_SHARED_LIBRARY_NAME='-Xlinker -install_name -Xlinker @rpath/$1'
+      SET_SHARED_LIBRARY_MAPFILE=''
+    else
+      # Default works for linux, might work on other platforms as well.
+      SHARED_LIBRARY_FLAGS='-shared'
+      SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker \$$$$ORIGIN$1'
+      SET_SHARED_LIBRARY_ORIGIN="-Xlinker -z -Xlinker origin $SET_EXECUTABLE_ORIGIN"
+      SET_SHARED_LIBRARY_NAME='-Xlinker -soname=$1'
+      SET_SHARED_LIBRARY_MAPFILE='-Xlinker -version-script=$1'
+    fi
+  elif test "x$TOOLCHAIN_TYPE" = xclang; then
+    PICFLAG=''
+    C_FLAG_REORDER=''
+    CXX_FLAG_REORDER=''
+
     if test "x$OPENJDK_TARGET_OS" = xmacosx; then
       # Linking is different on MacOSX
       SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $PICFLAG"
@@ -41297,6 +41337,8 @@ $as_echo "$ac_cv_c_bigendian" >&6; }
   # Generate make dependency files
   if test "x$TOOLCHAIN_TYPE" = xgcc; then
     C_FLAG_DEPS="-MMD -MF"
+  elif test "x$TOOLCHAIN_TYPE" = xclang; then
+    C_FLAG_DEPS="-MMD -MF"
   elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
     C_FLAG_DEPS="-xMMD -xMF"
   elif test "x$TOOLCHAIN_TYPE" = xxlc; then
@@ -41315,6 +41357,9 @@ $as_echo "$ac_cv_c_bigendian" >&6; }
       CFLAGS_DEBUG_SYMBOLS="-g"
       CXXFLAGS_DEBUG_SYMBOLS="-g"
     fi
+  elif test "x$TOOLCHAIN_TYPE" = xclang; then
+    CFLAGS_DEBUG_SYMBOLS="-g"
+    CXXFLAGS_DEBUG_SYMBOLS="-g"
   elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
     CFLAGS_DEBUG_SYMBOLS="-g -xs"
     CXXFLAGS_DEBUG_SYMBOLS="-g0 -xs"
@@ -41370,6 +41415,20 @@ $as_echo "$ac_cv_c_bigendian" >&6; }
         C_O_FLAG_NORM="-O2"
         C_O_FLAG_NONE="-O0"
       fi
+    elif test "x$TOOLCHAIN_TYPE" = xclang; then
+      if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+        # On MacOSX we optimize for size, something
+        # we should do for all platforms?
+        C_O_FLAG_HIGHEST="-Os"
+        C_O_FLAG_HI="-Os"
+        C_O_FLAG_NORM="-Os"
+        C_O_FLAG_NONE=""
+      else
+        C_O_FLAG_HIGHEST="-O3"
+        C_O_FLAG_HI="-O3"
+        C_O_FLAG_NORM="-O2"
+        C_O_FLAG_NONE="-O0"
+      fi
     elif test "x$TOOLCHAIN_TYPE" = xxlc; then
       C_O_FLAG_HIGHEST="-O3"
       C_O_FLAG_HI="-O3 -qstrict"

common/autoconf/toolchain.m4

@@ -96,8 +96,27 @@ AC_DEFUN_ONCE([TOOLCHAIN_DETERMINE_TOOLCHAIN_TYPE],
   # Use indirect variable referencing
   toolchain_var_name=VALID_TOOLCHAINS_$OPENJDK_BUILD_OS
   VALID_TOOLCHAINS=${!toolchain_var_name}
+
+  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    # On Mac OS X, default toolchain to clang after Xcode 5
+    XCODE_VERSION_OUTPUT=`xcodebuild -version 2>&1 | $HEAD -n 1`
+    $ECHO "$XCODE_VERSION_OUTPUT" | $GREP "Xcode " > /dev/null
+    if test $? -ne 0; then
+      AC_MSG_ERROR([Failed to determine Xcode version.])
+    fi
+    XCODE_MAJOR_VERSION=`$ECHO $XCODE_VERSION_OUTPUT | \
+        $SED -e 's/^Xcode \(@<:@1-9@:>@@<:@0-9.@:>@*\)/\1/' | \
+        $CUT -f 1 -d .`
+    AC_MSG_NOTICE([Xcode major version: $XCODE_MAJOR_VERSION])
+    if test $XCODE_MAJOR_VERSION -ge 5; then
+        DEFAULT_TOOLCHAIN="clang"
+    else
+        DEFAULT_TOOLCHAIN="gcc"
+    fi
+  else
     # First toolchain type in the list is the default
     DEFAULT_TOOLCHAIN=${VALID_TOOLCHAINS%% *}
+  fi
   
   if test "x$with_toolchain_type" = xlist; then
     # List all toolchains