#

# Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.  Oracle designates this

# particular file as subject to the "Classpath" exception as provided

# by Oracle in the LICENSE file that accompanied this code.

#

# This code is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

#

# You should have received a copy of the GNU General Public License version

# 2 along with this work; if not, write to the Free Software Foundation,

# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

# or visit www.oracle.com if you need additional information or have any

# questions.

#

################################################################################

#

AC_DEFUN([FLAGS_SETUP_LDFLAGS],

[

  FLAGS_SETUP_LDFLAGS_HELPER

  # Setup the target toolchain

  # On some platforms (mac) the linker warns about non existing -L dirs.

  # For any of the variants server, client or minimal, the dir matches the

  # variant name. The "main" variant should be used for linking. For the

  # rest, the dir is just server.

  if HOTSPOT_CHECK_JVM_VARIANT(server) || HOTSPOT_CHECK_JVM_VARIANT(client) \

      || HOTSPOT_CHECK_JVM_VARIANT(minimal); then

    TARGET_JVM_VARIANT_PATH=$JVM_VARIANT_MAIN

  else

    TARGET_JVM_VARIANT_PATH=server

  fi

  FLAGS_SETUP_LDFLAGS_CPU_DEP([TARGET])

  # Setup the build toolchain

  # When building a buildjdk, it's always only the server variant

  BUILD_JVM_VARIANT_PATH=server

  FLAGS_SETUP_LDFLAGS_CPU_DEP([BUILD], [OPENJDK_BUILD_])

  LDFLAGS_TESTLIB="$LDFLAGS_JDKLIB"

  LDFLAGS_TESTEXE="$LDFLAGS_JDKEXE ${TARGET_LDFLAGS_JDK_LIBPATH}"

  AC_SUBST(LDFLAGS_TESTLIB)

  AC_SUBST(LDFLAGS_TESTEXE)

])

################################################################################

# CPU independent LDFLAGS setup, used for both target and build toolchain.

AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],

[

  # Setup basic LDFLAGS

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    # "-z relro" supported in GNU binutils 2.17 and later

    LINKER_RELRO_FLAG="-Wl,-z,relro"

    FLAGS_LINKER_CHECK_ARGUMENTS(ARGUMENT: [$LINKER_RELRO_FLAG],

      IF_TRUE: [HAS_LINKER_RELRO=true],

      IF_FALSE: [HAS_LINKER_RELRO=false])

    # "-z now" supported in GNU binutils 2.11 and later

    LINKER_NOW_FLAG="-Wl,-z,now"

    FLAGS_LINKER_CHECK_ARGUMENTS(ARGUMENT: [$LINKER_NOW_FLAG],

      IF_TRUE: [HAS_LINKER_NOW=true],

      IF_FALSE: [HAS_LINKER_NOW=false])

    # If this is a --hash-style=gnu system, use --hash-style=both, why?

    # We have previously set HAS_GNU_HASH if this is the case

    if test -n "$HAS_GNU_HASH"; then

      BASIC_LDFLAGS="-Wl,--hash-style=both"

      LIBJSIG_HASHSTYLE_LDFLAGS="-Wl,--hash-style=both"

    fi

    # And since we now know that the linker is gnu, then add -z defs, to forbid

    # undefined symbols in object files.

    BASIC_LDFLAGS="$BASIC_LDFLAGS -Wl,-z,defs"

    BASIC_LDFLAGS_JVM_ONLY="-Wl,-z,noexecstack -Wl,-O1"

    BASIC_LDFLAGS_JDK_LIB_ONLY="-Wl,-z,noexecstack"

    LIBJSIG_NOEXECSTACK_LDFLAGS="-Wl,-z,noexecstack"

    if test "x$HAS_LINKER_RELRO" = "xtrue"; then

      BASIC_LDFLAGS_JVM_ONLY="$BASIC_LDFLAGS_JVM_ONLY $LINKER_RELRO_FLAG"

    fi

  elif test "x$TOOLCHAIN_TYPE" = xclang; then

    BASIC_LDFLAGS_JVM_ONLY="-mno-omit-leaf-frame-pointer -mstack-alignment=16 \

        -stdlib=libstdc++ -fPIC"

  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    BASIC_LDFLAGS="-Wl,-z,defs"

    BASIC_LDFLAGS_ONLYCXX="-norunpath"

    BASIC_LDFLAGS_ONLYCXX_JDK_ONLY="-xnolib"

    BASIC_LDFLAGS_JDK_ONLY="-ztext"

    BASIC_LDFLAGS_JVM_ONLY="-library=%none -mt -z noversion"

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    BASIC_LDFLAGS="-b64 -brtl -bnolibpath -bexpall -bernotok -btextpsize:64K \

        -bdatapsize:64K -bstackpsize:64K"

    BASIC_LDFLAGS_JVM_ONLY="-Wl,-lC_r"

  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    BASIC_LDFLAGS="-nologo -opt:ref"

    BASIC_LDFLAGS_JDK_ONLY="-incremental:no"

    BASIC_LDFLAGS_JVM_ONLY="-opt:icf,8 -subsystem:windows -base:0x8000000"

  fi

  # Setup OS-dependent LDFLAGS

  if test "x$TOOLCHAIN_TYPE" = xclang || test "x$TOOLCHAIN_TYPE" = xgcc; then

    if test "x$OPENJDK_TARGET_OS" = xmacosx; then

      # Assume clang or gcc.

      # FIXME: We should really generalize SET_SHARED_LIBRARY_ORIGIN instead.

      OS_LDFLAGS_JVM_ONLY="-Wl,-rpath,@loader_path/. -Wl,-rpath,@loader_path/.."

      OS_LDFLAGS_JDK_ONLY="-mmacosx-version-min=$MACOSX_VERSION_MIN"

    fi

  fi

  # Setup debug level-dependent LDFLAGS

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    if test "x$OPENJDK_TARGET_OS" = xlinux; then

       if test x$DEBUG_LEVEL = xrelease; then

          DEBUGLEVEL_LDFLAGS_JDK_ONLY="$DEBUGLEVEL_LDFLAGS_JDK_ONLY -Wl,-O1"

       else

          # mark relocations read only on (fast/slow) debug builds

          if test "x$HAS_LINKER_RELRO" = "xtrue"; then

            DEBUGLEVEL_LDFLAGS_JDK_ONLY="$LINKER_RELRO_FLAG"

          fi

       fi

       if test x$DEBUG_LEVEL = xslowdebug; then

          if test "x$HAS_LINKER_NOW" = "xtrue"; then

            # do relocations at load

            DEBUGLEVEL_LDFLAGS="$LINKER_NOW_FLAG"

          fi

       fi

    fi

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    # We need '-qminimaltoc' or '-qpic=large -bbigtoc' if the TOC overflows.

    # Hotspot now overflows its 64K TOC (currently only for debug),

    # so we build with '-qpic=large -bbigtoc'.

    if test "x$DEBUG_LEVEL" != xrelease; then

      DEBUGLEVEL_LDFLAGS_JVM_ONLY="$DEBUGLEVEL_LDFLAGS_JVM_ONLY -bbigtoc"

    fi

  fi

  # Setup LDFLAGS for linking executables

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    EXECUTABLE_LDFLAGS="$EXECUTABLE_LDFLAGS -Wl,--allow-shlib-undefined"

  fi

  # Export some intermediate variables for compatibility

  LDFLAGS_CXX_JDK="$BASIC_LDFLAGS_ONLYCXX $BASIC_LDFLAGS_ONLYCXX_JDK_ONLY $DEBUGLEVEL_LDFLAGS_JDK_ONLY"

  AC_SUBST(LDFLAGS_CXX_JDK)

  AC_SUBST(LIBJSIG_HASHSTYLE_LDFLAGS)

  AC_SUBST(LIBJSIG_NOEXECSTACK_LDFLAGS)

])

################################################################################

# $1 - Either BUILD or TARGET to pick the correct OS/CPU variables to check

#      conditionals against.

# $2 - Optional prefix for each variable defined.

AC_DEFUN([FLAGS_SETUP_LDFLAGS_CPU_DEP],

[

  # Setup CPU-dependent basic LDFLAGS. These can differ between the target and

  # build toolchain.

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    if test "x${OPENJDK_$1_CPU}" = xx86; then

      $1_CPU_LDFLAGS_JVM_ONLY="-march=i586"

    elif test "x$OPENJDK_$1_CPU" = xarm; then

      $1_CPU_LDFLAGS_JVM_ONLY="${$1_CPU_LDFLAGS_JVM_ONLY} -fsigned-char"

      $1_CPU_LDFLAGS="$ARM_ARCH_TYPE_FLAGS $ARM_FLOAT_TYPE_FLAGS"

    elif test "x$FLAGS_CPU" = xaarch64; then

      if test "x$HOTSPOT_TARGET_CPU_PORT" = xarm64; then

        $1_CPU_LDFLAGS_JVM_ONLY="${$1_CPU_LDFLAGS_JVM_ONLY} -fsigned-char"

      fi

    fi

  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    if test "x${OPENJDK_$1_CPU}" = "xsparcv9"; then

      $1_CPU_LDFLAGS_JVM_ONLY="-xarch=sparc"

    fi

  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    if test "x${OPENJDK_$1_CPU}" = "xx86"; then

      $1_CPU_LDFLAGS="-safeseh"

      # NOTE: Old build added -machine. Probably not needed.

      $1_CPU_LDFLAGS_JVM_ONLY="-machine:I386"

      $1_CPU_EXECUTABLE_LDFLAGS="-stack:327680"

    else

      $1_CPU_LDFLAGS_JVM_ONLY="-machine:AMD64"

      $1_CPU_EXECUTABLE_LDFLAGS="-stack:1048576"

    fi

  fi

  # JVM_VARIANT_PATH depends on if this is build or target...

  if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    $1_LDFLAGS_JDK_LIBPATH="-libpath:${OUTPUTDIR}/support/modules_libs/java.base"

  else

    $1_LDFLAGS_JDK_LIBPATH="-L\$(SUPPORT_OUTPUTDIR)/modules_libs/java.base \

        -L\$(SUPPORT_OUTPUTDIR)/modules_libs/java.base/${$1_JVM_VARIANT_PATH}"

  fi

  # Export variables according to old definitions, prefix with $2 if present.

  LDFLAGS_JDK_COMMON="$BASIC_LDFLAGS $BASIC_LDFLAGS_JDK_ONLY \

      $OS_LDFLAGS_JDK_ONLY $DEBUGLEVEL_LDFLAGS_JDK_ONLY ${$2EXTRA_LDFLAGS}"

  $2LDFLAGS_JDKLIB="$LDFLAGS_JDK_COMMON $BASIC_LDFLAGS_JDK_LIB_ONLY \

      ${$1_LDFLAGS_JDK_LIBPATH} $SHARED_LIBRARY_FLAGS"

  $2LDFLAGS_JDKEXE="$LDFLAGS_JDK_COMMON $EXECUTABLE_LDFLAGS \

      ${$1_CPU_EXECUTABLE_LDFLAGS}"

  $2JVM_LDFLAGS="$BASIC_LDFLAGS $BASIC_LDFLAGS_JVM_ONLY $OS_LDFLAGS_JVM_ONLY \

      $DEBUGLEVEL_LDFLAGS $DEBUGLEVEL_LDFLAGS_JVM_ONLY $BASIC_LDFLAGS_ONLYCXX \

      ${$1_CPU_LDFLAGS} ${$1_CPU_LDFLAGS_JVM_ONLY} ${$2EXTRA_LDFLAGS}"

  AC_SUBST($2LDFLAGS_JDKLIB)

  AC_SUBST($2LDFLAGS_JDKEXE)

  AC_SUBST($2JVM_LDFLAGS)

])