#

# 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.

#

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

#

# Setup flags for C/C++ compiler

#

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

#

# How to compile shared libraries.

#

AC_DEFUN([FLAGS_SETUP_SHARED_LIBS],

[

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    C_FLAG_REORDER=''

    # Default works for linux, might work on other platforms as well.

    SHARED_LIBRARY_FLAGS='-shared'

    SET_EXECUTABLE_ORIGIN='-Wl,-rpath,\$$ORIGIN[$]1'

    SET_SHARED_LIBRARY_ORIGIN="-Wl,-z,origin $SET_EXECUTABLE_ORIGIN"

    SET_SHARED_LIBRARY_NAME='-Wl,-soname=[$]1'

    SET_SHARED_LIBRARY_MAPFILE='-Wl,-version-script=[$]1'

  elif test "x$TOOLCHAIN_TYPE" = xclang; then

    C_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"

      SET_EXECUTABLE_ORIGIN='-Wl,-rpath,@loader_path$(or [$]1,/.)'

      SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"

      SET_SHARED_LIBRARY_NAME='-Wl,-install_name,@rpath/[$]1'

      SET_SHARED_LIBRARY_MAPFILE='-Wl,-exported_symbols_list,[$]1'

    else

      # Default works for linux, might work on other platforms as well.

      SHARED_LIBRARY_FLAGS='-shared'

      SET_EXECUTABLE_ORIGIN='-Wl,-rpath,\$$ORIGIN[$]1'

      SET_SHARED_LIBRARY_NAME='-Wl,-soname=[$]1'

      SET_SHARED_LIBRARY_MAPFILE='-Wl,-version-script=[$]1'

      # arm specific settings

      if test "x$OPENJDK_TARGET_CPU" = "xarm"; then

        # '-Wl,-z,origin' isn't used on arm.

        SET_SHARED_LIBRARY_ORIGIN='-Wl,-rpath,\$$$$ORIGIN[$]1'

      else

        SET_SHARED_LIBRARY_ORIGIN="-Wl,-z,origin $SET_EXECUTABLE_ORIGIN"

      fi

    fi

  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    C_FLAG_REORDER='-xF'

    SHARED_LIBRARY_FLAGS="-G"

    SET_EXECUTABLE_ORIGIN='-R\$$ORIGIN[$]1'

    SET_SHARED_LIBRARY_ORIGIN="$SET_EXECUTABLE_ORIGIN"

    SET_SHARED_LIBRARY_NAME='-h [$]1'

    SET_SHARED_LIBRARY_MAPFILE='-M[$]1'

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    C_FLAG_REORDER=''

    SHARED_LIBRARY_FLAGS="-qmkshrobj -bM:SRE -bnoentry"

    SET_EXECUTABLE_ORIGIN=""

    SET_SHARED_LIBRARY_ORIGIN=''

    SET_SHARED_LIBRARY_NAME=''

    SET_SHARED_LIBRARY_MAPFILE=''

  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    C_FLAG_REORDER=''

    SHARED_LIBRARY_FLAGS="-dll"

    SET_EXECUTABLE_ORIGIN=''

    SET_SHARED_LIBRARY_ORIGIN=''

    SET_SHARED_LIBRARY_NAME=''

    SET_SHARED_LIBRARY_MAPFILE='-def:[$]1'

  fi

  AC_SUBST(C_FLAG_REORDER)

  AC_SUBST(SET_EXECUTABLE_ORIGIN)

  AC_SUBST(SET_SHARED_LIBRARY_ORIGIN)

  AC_SUBST(SET_SHARED_LIBRARY_NAME)

  AC_SUBST(SET_SHARED_LIBRARY_MAPFILE)

  AC_SUBST(SHARED_LIBRARY_FLAGS)

])

AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS],

[

  # Debug symbols

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    if test "x$OPENJDK_TARGET_CPU_BITS" = "x64" && test "x$DEBUG_LEVEL" = "xfastdebug"; then

      CFLAGS_DEBUG_SYMBOLS="-g1"

    else

      CFLAGS_DEBUG_SYMBOLS="-g"

    fi

  elif test "x$TOOLCHAIN_TYPE" = xclang; then

    CFLAGS_DEBUG_SYMBOLS="-g"

  elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    CFLAGS_DEBUG_SYMBOLS="-g -xs"

    # -g0 enables debug symbols without disabling inlining.

    CXXFLAGS_DEBUG_SYMBOLS="-g0 -xs"

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    CFLAGS_DEBUG_SYMBOLS="-g"

  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    CFLAGS_DEBUG_SYMBOLS="-Zi"

  fi

  if test "x$CXXFLAGS_DEBUG_SYMBOLS" = x; then

    # If we did not specify special flags for C++, use C version

    CXXFLAGS_DEBUG_SYMBOLS="$CFLAGS_DEBUG_SYMBOLS"

  fi

  AC_SUBST(CFLAGS_DEBUG_SYMBOLS)

  AC_SUBST(CXXFLAGS_DEBUG_SYMBOLS)

  # FIXME: This was never used in the old build. What to do with it?

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    # "-Og" suppported for GCC 4.8 and later

    CFLAG_OPTIMIZE_DEBUG_FLAG="-Og"

    FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$CFLAG_OPTIMIZE_DEBUG_FLAG],

      IF_TRUE: [HAS_CFLAG_OPTIMIZE_DEBUG=true],

      IF_FALSE: [HAS_CFLAG_OPTIMIZE_DEBUG=false])

  fi

])

AC_DEFUN([FLAGS_SETUP_QUALITY_CHECKS],

[

  AC_ARG_ENABLE([warnings-as-errors], [AS_HELP_STRING([--disable-warnings-as-errors],

      [do not consider native warnings to be an error @<:@enabled@:>@])])

  AC_MSG_CHECKING([if native warnings are errors])

  if test "x$enable_warnings_as_errors" = "xyes"; then

    AC_MSG_RESULT([yes (explicitly set)])

    WARNINGS_AS_ERRORS=true

  elif test "x$enable_warnings_as_errors" = "xno"; then

    AC_MSG_RESULT([no])

    WARNINGS_AS_ERRORS=false

  elif test "x$enable_warnings_as_errors" = "x"; then

    AC_MSG_RESULT([yes (default)])

    WARNINGS_AS_ERRORS=true

  else

    AC_MSG_ERROR([--enable-warnings-as-errors accepts no argument])

  fi

  AC_SUBST(WARNINGS_AS_ERRORS)

  case "${TOOLCHAIN_TYPE}" in

    microsoft)

      DISABLE_WARNING_PREFIX="-wd"

      CFLAGS_WARNINGS_ARE_ERRORS="-WX"

      ;;

    solstudio)

      DISABLE_WARNING_PREFIX="-erroff="

      CFLAGS_WARNINGS_ARE_ERRORS="-errtags -errwarn=%all"

      ;;

    gcc)

      # Prior to gcc 4.4, a -Wno-X where X is unknown for that version of gcc will cause an error

      FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [-Wno-this-is-a-warning-that-do-not-exist],

          IF_TRUE: [GCC_CAN_DISABLE_WARNINGS=true],

          IF_FALSE: [GCC_CAN_DISABLE_WARNINGS=false]

      )

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

        DISABLE_WARNING_PREFIX="-Wno-"

      else

        DISABLE_WARNING_PREFIX=

      fi

      CFLAGS_WARNINGS_ARE_ERRORS="-Werror"

      # Repeate the check for the BUILD_CC and BUILD_CXX. Need to also reset

      # CFLAGS since any target specific flags will likely not work with the

      # build compiler

      CC_OLD="$CC"

      CXX_OLD="$CXX"

      CC="$BUILD_CC"

      CXX="$BUILD_CXX"

      CFLAGS_OLD="$CFLAGS"

      CFLAGS=""

      FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [-Wno-this-is-a-warning-that-do-not-exist],

          IF_TRUE: [BUILD_CC_CAN_DISABLE_WARNINGS=true],

          IF_FALSE: [BUILD_CC_CAN_DISABLE_WARNINGS=false]

      )

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

        BUILD_CC_DISABLE_WARNING_PREFIX="-Wno-"

      else

        BUILD_CC_DISABLE_WARNING_PREFIX=

      fi

      CC="$CC_OLD"

      CXX="$CXX_OLD"

      CFLAGS="$CFLAGS_OLD"

      ;;

    clang)

      DISABLE_WARNING_PREFIX="-Wno-"

      CFLAGS_WARNINGS_ARE_ERRORS="-Werror"

      ;;

    xlc)

      DISABLE_WARNING_PREFIX="-qsuppress="

      CFLAGS_WARNINGS_ARE_ERRORS="-qhalt=w"

      ;;

  esac

  AC_SUBST(DISABLE_WARNING_PREFIX)

  AC_SUBST(BUILD_CC_DISABLE_WARNING_PREFIX)

  AC_SUBST(CFLAGS_WARNINGS_ARE_ERRORS)

  # bounds, memory and behavior checking options

  if test "x$TOOLCHAIN_TYPE" = xgcc; then

    case $DEBUG_LEVEL in

    release )

      # no adjustment

      ;;

    fastdebug )

      # no adjustment

      ;;

    slowdebug )

      # FIXME: By adding this to C(XX)FLAGS_DEBUG_OPTIONS/JVM_CFLAGS_SYMBOLS it

      # get's added conditionally on whether we produce debug symbols or not.

      # This is most likely not really correct.

      # Add runtime stack smashing and undefined behavior checks.

      # Not all versions of gcc support -fstack-protector

      STACK_PROTECTOR_CFLAG="-fstack-protector-all"

      FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$STACK_PROTECTOR_CFLAG -Werror],

          IF_FALSE: [STACK_PROTECTOR_CFLAG=""])

      CFLAGS_DEBUG_OPTIONS="$STACK_PROTECTOR_CFLAG --param ssp-buffer-size=1"

      CXXFLAGS_DEBUG_OPTIONS="$STACK_PROTECTOR_CFLAG --param ssp-buffer-size=1"

      ;;

    esac

  fi

])

AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],

[

  # Optimization levels

  # Most toolchains share opt flags between CC and CXX;

  # setup for C and duplicate afterwards.

  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    CC_HIGHEST="-fns -fsimple -fsingle -xbuiltin=%all -xdepend -xrestrict -xlibmil"

    C_O_FLAG_HIGHEST_JVM="-xO4"

    C_O_FLAG_DEBUG_JVM=""

    C_O_FLAG_SIZE=""

    C_O_FLAG_DEBUG=""

    C_O_FLAG_NONE=""

    if test "x$OPENJDK_TARGET_CPU_ARCH" = "xx86"; then

      C_O_FLAG_HIGHEST="-xO4 -Wu,-O4~yz $CC_HIGHEST"

      C_O_FLAG_HI="-xO4 -Wu,-O4~yz"

      C_O_FLAG_NORM="-xO2 -Wu,-O2~yz"

    elif test "x$OPENJDK_TARGET_CPU_ARCH" = "xsparc"; then

      C_O_FLAG_HIGHEST="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0 \

          -xprefetch=auto,explicit -xchip=ultra $CC_HIGHEST"

      C_O_FLAG_HI="-xO4 -Wc,-Qrm-s -Wc,-Qiselect-T0"

      C_O_FLAG_NORM="-xO2 -Wc,-Qrm-s -Wc,-Qiselect-T0"

    fi

  elif test "x$TOOLCHAIN_TYPE" = xgcc; then

    C_O_FLAG_HIGHEST_JVM="-O3"

    C_O_FLAG_HIGHEST="-O3"

    C_O_FLAG_HI="-O3"

    C_O_FLAG_NORM="-O2"

    C_O_FLAG_SIZE="-Os"

    C_O_FLAG_DEBUG="-O0"

    C_O_FLAG_DEBUG_JVM="-O0"

    C_O_FLAG_NONE="-O0"

  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_JVM="-Os"

      C_O_FLAG_HIGHEST="-Os"

      C_O_FLAG_HI="-Os"

      C_O_FLAG_NORM="-Os"

      C_O_FLAG_DEBUG_JVM=""

    else

      C_O_FLAG_HIGHEST_JVM="-O3"

      C_O_FLAG_HIGHEST="-O3"

      C_O_FLAG_HI="-O3"

      C_O_FLAG_NORM="-O2"

      C_O_FLAG_DEBUG_JVM="-O0"

    fi

    C_O_FLAG_SIZE="-Os"

    C_O_FLAG_DEBUG="-O0"

    C_O_FLAG_NONE="-O0"

  elif test "x$TOOLCHAIN_TYPE" = xxlc; then

    C_O_FLAG_HIGHEST_JVM="-O3 -qhot=level=1 -qinline -qinlglue"

    C_O_FLAG_HIGHEST="-O3 -qhot=level=1 -qinline -qinlglue"

    C_O_FLAG_HI="-O3 -qinline -qinlglue"

    C_O_FLAG_NORM="-O2"

    C_O_FLAG_DEBUG="-qnoopt"

    # FIXME: Value below not verified.

    C_O_FLAG_DEBUG_JVM=""

    C_O_FLAG_NONE="-qnoopt"

  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then

    C_O_FLAG_HIGHEST_JVM="-O2 -Oy-"

    C_O_FLAG_HIGHEST="-O2"

    C_O_FLAG_HI="-O1"

    C_O_FLAG_NORM="-O1"

    C_O_FLAG_DEBUG="-Od"

    C_O_FLAG_DEBUG_JVM=""

    C_O_FLAG_NONE="-Od"

    C_O_FLAG_SIZE="-Os"

  fi

  # Now copy to C++ flags

  CXX_O_FLAG_HIGHEST_JVM="$C_O_FLAG_HIGHEST_JVM"

  CXX_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST"

  CXX_O_FLAG_HI="$C_O_FLAG_HI"

  CXX_O_FLAG_NORM="$C_O_FLAG_NORM"

  CXX_O_FLAG_DEBUG="$C_O_FLAG_DEBUG"

  CXX_O_FLAG_DEBUG_JVM="$C_O_FLAG_DEBUG_JVM"

  CXX_O_FLAG_NONE="$C_O_FLAG_NONE"

  CXX_O_FLAG_SIZE="$C_O_FLAG_SIZE"

  if test "x$TOOLCHAIN_TYPE" = xsolstudio; then

    # In solstudio, also add this to C (but not C++) flags...

    C_O_FLAG_HIGHEST="$C_O_FLAG_HIGHEST -xalias_level=basic"

  fi

  # Adjust optimization flags according to debug level.

  case $DEBUG_LEVEL in

    release )

      # no adjustment

      ;;

    fastdebug )

      # Not quite so much optimization

      C_O_FLAG_HI="$C_O_FLAG_NORM"

      CXX_O_FLAG_HI="$CXX_O_FLAG_NORM"

      ;;

    slowdebug )

      # Disable optimization

      C_O_FLAG_HIGHEST_JVM="$C_O_FLAG_DEBUG_JVM"

      C_O_FLAG_HIGHEST="$C_O_FLAG_DEBUG"

      C_O_FLAG_HI="$C_O_FLAG_DEBUG"

      C_O_FLAG_NORM="$C_O_FLAG_DEBUG"

      C_O_FLAG_SIZE="$C_O_FLAG_DEBUG"

      CXX_O_FLAG_HIGHEST_JVM="$CXX_O_FLAG_DEBUG_JVM"

      CXX_O_FLAG_HIGHEST="$CXX_O_FLAG_DEBUG"

      CXX_O_FLAG_HI="$CXX_O_FLAG_DEBUG"

      CXX_O_FLAG_NORM="$CXX_O_FLAG_DEBUG"

      CXX_O_FLAG_SIZE="$CXX_O_FLAG_DEBUG"

      ;;

  esac

  AC_SUBST(C_O_FLAG_HIGHEST_JVM)

  AC_SUBST(C_O_FLAG_HIGHEST)

  AC_SUBST(C_O_FLAG_HI)

  AC_SUBST(C_O_FLAG_NORM)

  AC_SUBST(C_O_FLAG_NONE)

  AC_SUBST(C_O_FLAG_SIZE)

  AC_SUBST(CXX_O_FLAG_HIGHEST_JVM)

  AC_SUBST(CXX_O_FLAG_HIGHEST)

  AC_SUBST(CXX_O_FLAG_HI)

  AC_SUBST(CXX_O_FLAG_NORM)

  AC_SUBST(CXX_O_FLAG_NONE)

  AC_SUBST(CXX_O_FLAG_SIZE)

])