common/autoconf/flags.m4

rev 977 : JDK-8019470: Changes needed to compile JDK8 on MacOS with clang compiler
Reviewed-by:

*** 146,155 ****
--- 146,175 ----
        SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker \$$$$ORIGIN[$]1'
        SET_SHARED_LIBRARY_ORIGIN="-Xlinker -z -Xlinker origin $SET_EXECUTABLE_ORIGIN"
        SET_SHARED_LIBRARY_NAME='-Xlinker -soname=[$]1'
        SET_SHARED_LIBRARY_MAPFILE='-Xlinker -version-script=[$]1'
      fi
+   elif test "x$TOOLCHAIN_TYPE" = xclang; then
+     PICFLAG=''
+     C_FLAG_REORDER=''
+     CXX_FLAG_REORDER=''
+ 
+     if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+       # Linking is different on MacOSX
+       SHARED_LIBRARY_FLAGS="-dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $PICFLAG"
+       SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker @loader_path/.'
+       SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"
+       SET_SHARED_LIBRARY_NAME='-Xlinker -install_name -Xlinker @rpath/[$]1'
+       SET_SHARED_LIBRARY_MAPFILE=''
+     else
+       # Default works for linux, might work on other platforms as well.
+       SHARED_LIBRARY_FLAGS='-shared'
+       SET_EXECUTABLE_ORIGIN='-Xlinker -rpath -Xlinker \$$$$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" = xsolstudio; then
      PICFLAG="-KPIC"
      C_FLAG_REORDER='-xF'
      CXX_FLAG_REORDER='-xF'
      SHARED_LIBRARY_FLAGS="-G"
*** 240,249 ****
--- 260,271 ----
    # fi
  
    # 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
      C_FLAG_DEPS="-qmakedep=gcc -MF"
    fi
*** 258,267 ****
--- 280,292 ----
        CXXFLAGS_DEBUG_SYMBOLS="-g1"
      else
        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"
    elif test "x$TOOLCHAIN_TYPE" = xxlc; then
      CFLAGS_DEBUG_SYMBOLS="-g"
*** 305,314 ****
--- 330,353 ----
        if test "x$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$TOOLCHAIN_TYPE" = xclang; then
+       if test "x$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"