common/autoconf/flags.m4

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

@@ -146,10 +146,30 @@
       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"

@@ -240,10 +260,12 @@
   # 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

@@ -258,10 +280,13 @@
       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"

@@ -305,10 +330,24 @@
       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"