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Java example source code file (basics_windows.m4)

This example Java source code file (basics_windows.m4) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

ac_defun, ac_msg_checking, ac_msg_error, ac_msg_notice, ac_msg_result, cygpath, dos\-style, echo, grep, now, openjdk_build_os_env, the, this, windows

The basics_windows.m4 Java example source code

#
# Copyright (c) 2011, 2012, 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([BASIC_WINDOWS_REWRITE_AS_UNIX_PATH],
[
  windows_path="[$]$1"
  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
    unix_path=`$CYGPATH -u "$windows_path"`
    $1="$unix_path"
  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
    unix_path=`$ECHO "$windows_path" | $SED -e 's,^\\(.\\):,/\\1,g' -e 's,\\\\,/,g'`
    $1="$unix_path"
  fi
])

AC_DEFUN([BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH],
[
  unix_path="[$]$1"
  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
    windows_path=`$CYGPATH -m "$unix_path"`
    $1="$windows_path"
  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
    windows_path=`cmd //c echo $unix_path`
    $1="$windows_path"
  fi
])

# Helper function which possibly converts a path using DOS-style short mode.
# If so, the updated path is stored in $new_path.
# $1: The path to check
AC_DEFUN([BASIC_MAKE_WINDOWS_SPACE_SAFE_CYGWIN],
[
  input_path="$1"
  # Check if we need to convert this using DOS-style short mode. If the path
  # contains just simple characters, use it. Otherwise (spaces, weird characters),
  # take no chances and rewrite it.
  # Note: m4 eats our [], so we need to use @<:@ and @:>@ instead.
  has_forbidden_chars=`$ECHO "$input_path" | $GREP @<:@^-._/a-zA-Z0-9@:>@`
  if test "x$has_forbidden_chars" != x; then
    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
    shortmode_path=`$CYGPATH -s -m -a "$input_path"`
    path_after_shortmode=`$CYGPATH -u "$shortmode_path"`
    if test "x$path_after_shortmode" != "x$input_to_shortpath"; then
      # Going to short mode and back again did indeed matter. Since short mode is
      # case insensitive, let's make it lowercase to improve readability.
      shortmode_path=`$ECHO "$shortmode_path" | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
      # Now convert it back to Unix-stile (cygpath)
      input_path=`$CYGPATH -u "$shortmode_path"`
      new_path="$input_path"
    fi
  fi

  test_cygdrive_prefix=`$ECHO $input_path | $GREP ^/cygdrive/`
  if test "x$test_cygdrive_prefix" = x; then
    # As a simple fix, exclude /usr/bin since it's not a real path.
    if test "x`$ECHO $1 | $GREP ^/usr/bin/`" = x; then
      # The path is in a Cygwin special directory (e.g. /home). We need this converted to
      # a path prefixed by /cygdrive for fixpath to work.
      new_path="$CYGWIN_ROOT_PATH$input_path"
    fi
  fi
])

# Helper function which possibly converts a path using DOS-style short mode.
# If so, the updated path is stored in $new_path.
# $1: The path to check
AC_DEFUN([BASIC_MAKE_WINDOWS_SPACE_SAFE_MSYS],
[
  input_path="$1"
  # Check if we need to convert this using DOS-style short mode. If the path
  # contains just simple characters, use it. Otherwise (spaces, weird characters),
  # take no chances and rewrite it.
  # Note: m4 eats our [], so we need to use @<:@ and @:>@ instead.
  has_forbidden_chars=`$ECHO "$input_path" | $GREP @<:@^-_/:a-zA-Z0-9@:>@`
  if test "x$has_forbidden_chars" != x; then
    # Now convert it to mixed DOS-style, short mode (no spaces, and / instead of \)
    new_path=`cmd /c "for %A in (\"$input_path\") do @echo %~sA"|$TR \\\\\\\\ / | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
  fi
])

# FIXME: The BASIC_FIXUP_*_CYGWIN/MSYS is most likely too convoluted
# and could probably be heavily simplified. However, all changes in this
# area tend to need lot of testing in different scenarios, and in lack of
# proper unit testing, cleaning this up has not been deemed worth the effort
# at the moment.

AC_DEFUN([BASIC_FIXUP_PATH_CYGWIN],
[
  # Input might be given as Windows format, start by converting to
  # unix format.
  path="[$]$1"
  new_path=`$CYGPATH -u "$path"`

  # Cygwin tries to hide some aspects of the Windows file system, such that binaries are
  # named .exe but called without that suffix. Therefore, "foo" and "foo.exe" are considered
  # the same file, most of the time (as in "test -f"). But not when running cygpath -s, then
  # "foo.exe" is OK but "foo" is an error.
  #
  # This test is therefore slightly more accurate than "test -f" to check for file precense.
  # It is also a way to make sure we got the proper file name for the real test later on.
  test_shortpath=`$CYGPATH -s -m "$new_path" 2> /dev/null`
  if test "x$test_shortpath" = x; then
    AC_MSG_NOTICE([The path of $1, which resolves as "$path", is invalid.])
    AC_MSG_ERROR([Cannot locate the the path of $1])
  fi

  # Call helper function which possibly converts this using DOS-style short mode.
  # If so, the updated path is stored in $new_path.
  BASIC_MAKE_WINDOWS_SPACE_SAFE_CYGWIN([$new_path])

  if test "x$path" != "x$new_path"; then
    $1="$new_path"
    AC_MSG_NOTICE([Rewriting $1 to "$new_path"])
  fi
])

AC_DEFUN([BASIC_FIXUP_PATH_MSYS],
[
  path="[$]$1"
  has_colon=`$ECHO $path | $GREP ^.:`
  new_path="$path"
  if test "x$has_colon" = x; then
    # Not in mixed or Windows style, start by that.
    new_path=`cmd //c echo $path`
  fi

  BASIC_MAKE_WINDOWS_SPACE_SAFE_MSYS([$new_path])
  BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(new_path)
  if test "x$path" != "x$new_path"; then
    $1="$new_path"
    AC_MSG_NOTICE([Rewriting $1 to "$new_path"])
  fi

  # Save the first 10 bytes of this path to the storage, so fixpath can work.
  all_fixpath_prefixes=("${all_fixpath_prefixes@<:@@@:>@}" "${new_path:0:10}")
])

AC_DEFUN([BASIC_FIXUP_EXECUTABLE_CYGWIN],
[
  # First separate the path from the arguments. This will split at the first
  # space.
  complete="[$]$1"
  path="${complete%% *}"
  tmp="$complete EOL"
  arguments="${tmp#* }"

  # Input might be given as Windows format, start by converting to
  # unix format.
  new_path=`$CYGPATH -u "$path"`

  # Now try to locate executable using which
  new_path=`$WHICH "$new_path" 2> /dev/null`
  # bat and cmd files are not always considered executable in cygwin causing which
  # to not find them
  if test "x$new_path" = x \
      && test "x`$ECHO \"$path\" | $GREP -i -e \"\\.bat$\" -e \"\\.cmd$\"`" != x \
      && test "x`$LS \"$path\" 2>/dev/null`" != x; then
    new_path=`$CYGPATH -u "$path"`
  fi
  if test "x$new_path" = x; then
    # Oops. Which didn't find the executable.
    # The splitting of arguments from the executable at a space might have been incorrect,
    # since paths with space are more likely in Windows. Give it another try with the whole
    # argument.
    path="$complete"
    arguments="EOL"
    new_path=`$CYGPATH -u "$path"`
    new_path=`$WHICH "$new_path" 2> /dev/null`
    # bat and cmd files are not always considered executable in cygwin causing which
    # to not find them
    if test "x$new_path" = x \
        && test "x`$ECHO \"$path\" | $GREP -i -e \"\\.bat$\" -e \"\\.cmd$\"`" != x \
        && test "x`$LS \"$path\" 2>/dev/null`" != x; then
      new_path=`$CYGPATH -u "$path"`
    fi
    if test "x$new_path" = x; then
      # It's still not found. Now this is an unrecoverable error.
      AC_MSG_NOTICE([The path of $1, which resolves as "$complete", is not found.])
      has_space=`$ECHO "$complete" | $GREP " "`
      if test "x$has_space" != x; then
        AC_MSG_NOTICE([You might be mixing spaces in the path and extra arguments, which is not allowed.])
      fi
      AC_MSG_ERROR([Cannot locate the the path of $1])
    fi
  fi

  # Cygwin tries to hide some aspects of the Windows file system, such that binaries are
  # named .exe but called without that suffix. Therefore, "foo" and "foo.exe" are considered
  # the same file, most of the time (as in "test -f"). But not when running cygpath -s, then
  # "foo.exe" is OK but "foo" is an error.
  #
  # This test is therefore slightly more accurate than "test -f" to check for file presence.
  # It is also a way to make sure we got the proper file name for the real test later on.
  test_shortpath=`$CYGPATH -s -m "$new_path" 2> /dev/null`
  if test "x$test_shortpath" = x; then
    # Short path failed, file does not exist as specified.
    # Try adding .exe or .cmd
    if test -f "${new_path}.exe"; then
      input_to_shortpath="${new_path}.exe"
    elif test -f "${new_path}.cmd"; then
      input_to_shortpath="${new_path}.cmd"
    else
      AC_MSG_NOTICE([The path of $1, which resolves as "$new_path", is invalid.])
      AC_MSG_NOTICE([Neither "$new_path" nor "$new_path.exe/cmd" can be found])
      AC_MSG_ERROR([Cannot locate the the path of $1])
    fi
  else
    input_to_shortpath="$new_path"
  fi

  # Call helper function which possibly converts this using DOS-style short mode.
  # If so, the updated path is stored in $new_path.
  new_path="$input_to_shortpath"
  BASIC_MAKE_WINDOWS_SPACE_SAFE_CYGWIN([$input_to_shortpath])
  # remove trailing .exe if any
  new_path="${new_path/%.exe/}"
])

AC_DEFUN([BASIC_FIXUP_EXECUTABLE_MSYS],
[
  # First separate the path from the arguments. This will split at the first
  # space.
  complete="[$]$1"
  path="${complete%% *}"
  tmp="$complete EOL"
  arguments="${tmp#* }"

  # Input might be given as Windows format, start by converting to
  # unix format.
  new_path="$path"
  BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(new_path)

  # Now try to locate executable using which
  new_path=`$WHICH "$new_path" 2> /dev/null`

  if test "x$new_path" = x; then
    # Oops. Which didn't find the executable.
    # The splitting of arguments from the executable at a space might have been incorrect,
    # since paths with space are more likely in Windows. Give it another try with the whole
    # argument.
    path="$complete"
    arguments="EOL"
    new_path="$path"
    BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(new_path)

    new_path=`$WHICH "$new_path" 2> /dev/null`

    if test "x$new_path" = x; then
      # It's still not found. Now this is an unrecoverable error.
      AC_MSG_NOTICE([The path of $1, which resolves as "$complete", is not found.])
      has_space=`$ECHO "$complete" | $GREP " "`
      if test "x$has_space" != x; then
        AC_MSG_NOTICE([You might be mixing spaces in the path and extra arguments, which is not allowed.])
      fi
      AC_MSG_ERROR([Cannot locate the the path of $1])
    fi
  fi

  # Now new_path has a complete unix path to the binary
  if test "x`$ECHO $new_path | $GREP ^/bin/`" != x; then
    # Keep paths in /bin as-is, but remove trailing .exe if any
    new_path="${new_path/%.exe/}"
    # Do not save /bin paths to all_fixpath_prefixes!
  else
    # Not in mixed or Windows style, start by that.
    new_path=`cmd //c echo $new_path`
    BASIC_MAKE_WINDOWS_SPACE_SAFE_MSYS([$new_path])
    # Output is in $new_path
    BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(new_path)
    # remove trailing .exe if any
    new_path="${new_path/%.exe/}"

    # Save the first 10 bytes of this path to the storage, so fixpath can work.
    all_fixpath_prefixes=("${all_fixpath_prefixes@<:@@@:>@}" "${new_path:0:10}")
  fi
])

# Setup basic configuration paths, and platform-specific stuff related to PATHs.
AC_DEFUN([BASIC_CHECK_PATHS_WINDOWS],
[
  SRC_ROOT_LENGTH=`$THEPWDCMD -L|$WC -m`
  if test $SRC_ROOT_LENGTH -gt 100; then
    AC_MSG_ERROR([Your base path is too long. It is $SRC_ROOT_LENGTH characters long, but only 100 is supported])
  fi

  if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
    AC_MSG_CHECKING([cygwin release])
    CYGWIN_VERSION=`$UNAME -r`
    AC_MSG_RESULT([$CYGWIN_VERSION])
    WINDOWS_ENV_VENDOR='cygwin'
    WINDOWS_ENV_VERSION="$CYGWIN_VERSION"

    CYGWIN_VERSION_OK=`$ECHO $CYGWIN_VERSION | $GREP ^1.7.`
    if test "x$CYGWIN_VERSION_OK" = x; then
      AC_MSG_NOTICE([Your cygwin is too old. You are running $CYGWIN_VERSION, but at least cygwin 1.7 is required. Please upgrade.])
      AC_MSG_ERROR([Cannot continue])
    fi
    if test "x$CYGPATH" = x; then
      AC_MSG_ERROR([Something is wrong with your cygwin installation since I cannot find cygpath.exe in your path])
    fi
    AC_MSG_CHECKING([cygwin root directory as unix-style path])
    # The cmd output ends with Windows line endings (CR/LF), the grep command will strip that away
    cygwin_winpath_root=`cd / ; cmd /c cd | grep ".*"`
    # Force cygpath to report the proper root by including a trailing space, and then stripping it off again.
    CYGWIN_ROOT_PATH=`$CYGPATH -u "$cygwin_winpath_root " | $CUT -f 1 -d " "`
    AC_MSG_RESULT([$CYGWIN_ROOT_PATH])
    WINDOWS_ENV_ROOT_PATH="$CYGWIN_ROOT_PATH"
    test_cygdrive_prefix=`$ECHO $CYGWIN_ROOT_PATH | $GREP ^/cygdrive/`
    if test "x$test_cygdrive_prefix" = x; then
      AC_MSG_ERROR([Your cygdrive prefix is not /cygdrive. This is currently not supported. Change with mount -c.])
    fi
  elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
    AC_MSG_CHECKING([msys release])
    MSYS_VERSION=`$UNAME -r`
    AC_MSG_RESULT([$MSYS_VERSION])

    WINDOWS_ENV_VENDOR='msys'
    WINDOWS_ENV_VERSION="$MSYS_VERSION"

    AC_MSG_CHECKING([msys root directory as unix-style path])
    # The cmd output ends with Windows line endings (CR/LF), the grep command will strip that away
    MSYS_ROOT_PATH=`cd / ; cmd /c cd | grep ".*"`
    BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(MSYS_ROOT_PATH)
    AC_MSG_RESULT([$MSYS_ROOT_PATH])
    WINDOWS_ENV_ROOT_PATH="$MSYS_ROOT_PATH"
  else
    AC_MSG_ERROR([Unknown Windows environment. Neither cygwin nor msys was detected.])
  fi

  # Test if windows or unix (cygwin/msys) find is first in path.
  AC_MSG_CHECKING([what kind of 'find' is first on the PATH])
  FIND_BINARY_OUTPUT=`find --version 2>&1`
  if test "x`echo $FIND_BINARY_OUTPUT | $GREP GNU`" != x; then
    AC_MSG_RESULT([unix style])
  elif test "x`echo $FIND_BINARY_OUTPUT | $GREP FIND`" != x; then
    AC_MSG_RESULT([Windows])
    AC_MSG_NOTICE([Your path contains Windows tools (C:\Windows\system32) before your unix (cygwin or msys) tools.])
    AC_MSG_NOTICE([This will not work. Please correct and make sure /usr/bin (or similar) is first in path.])
    AC_MSG_ERROR([Cannot continue])
  else
    AC_MSG_RESULT([unknown])
    AC_MSG_WARN([It seems that your find utility is non-standard.])
  fi
])

AC_DEFUN_ONCE([BASIC_COMPILE_FIXPATH],
[
  # When using cygwin or msys, we need a wrapper binary that renames
  # /cygdrive/c/ arguments into c:/ arguments and peeks into
  # @files and rewrites these too! This wrapper binary is
  # called fixpath.
  FIXPATH=
  if test "x$OPENJDK_BUILD_OS" = xwindows; then
    AC_MSG_CHECKING([if fixpath can be created])
    FIXPATH_SRC="$SRC_ROOT/common/src/fixpath.c"
    FIXPATH_BIN="$OUTPUT_ROOT/fixpath.exe"
    if test "x$OPENJDK_BUILD_OS_ENV" = xwindows.cygwin; then
      FIXPATH_SRC=`$CYGPATH -m $FIXPATH_SRC`
      FIXPATH_BIN=`$CYGPATH -m $FIXPATH_BIN`
      # Important to keep the .exe suffix on Cygwin for Hotspot makefiles
      FIXPATH="$OUTPUT_ROOT/fixpath.exe -c"
    elif test "x$OPENJDK_BUILD_OS_ENV" = xwindows.msys; then
      FIXPATH_SRC=`cmd //c echo $FIXPATH_SRC`
      FIXPATH_BIN=`cmd //c echo $FIXPATH_BIN`

      # Take all collected prefixes and turn them into a -m/c/foo@/c/bar@... command line
      # @ was chosen as separator to minimize risk of other tools messing around with it
      all_unique_prefixes=`echo "${all_fixpath_prefixes@<:@@@:>@}" | tr ' ' '\n' | grep '^/./' | sort | uniq`
      fixpath_argument_list=`echo $all_unique_prefixes  | tr ' ' '@'`

      FIXPATH="$OUTPUT_ROOT/fixpath -m$fixpath_argument_list"
    fi
    rm -f $OUTPUT_ROOT/fixpath*
    cd $OUTPUT_ROOT
    $CC $FIXPATH_SRC -Fe$FIXPATH_BIN > $OUTPUT_ROOT/fixpath1.log 2>&1
    cd $CURDIR

    if test ! -x $OUTPUT_ROOT/fixpath.exe; then
      AC_MSG_RESULT([no])
      cat $OUTPUT_ROOT/fixpath1.log
      AC_MSG_ERROR([Could not create $OUTPUT_ROOT/fixpath.exe])
    fi
    AC_MSG_RESULT([yes])
    AC_MSG_CHECKING([if fixpath.exe works])
    cd $OUTPUT_ROOT
    $FIXPATH $CC $SRC_ROOT/common/src/fixpath.c -Fe$OUTPUT_ROOT/fixpath2.exe > $OUTPUT_ROOT/fixpath2.log 2>&1
    cd $CURDIR
    if test ! -x $OUTPUT_ROOT/fixpath2.exe; then
      AC_MSG_RESULT([no])
      cat $OUTPUT_ROOT/fixpath2.log
      AC_MSG_ERROR([fixpath did not work!])
    fi
    AC_MSG_RESULT([yes])
    rm -f $OUTPUT_ROOT/fixpath?.??? $OUTPUT_ROOT/fixpath.obj
  fi

  AC_SUBST(FIXPATH)
])

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