1 #
   2 # Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
   3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4 #
   5 # This code is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License version 2 only, as
   7 # published by the Free Software Foundation.  Oracle designates this
   8 # particular file as subject to the "Classpath" exception as provided
   9 # by Oracle in the LICENSE file that accompanied this code.
  10 #
  11 # This code is distributed in the hope that it will be useful, but WITHOUT
  12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 # version 2 for more details (a copy is included in the LICENSE file that
  15 # accompanied this code).
  16 #
  17 # You should have received a copy of the GNU General Public License version
  18 # 2 along with this work; if not, write to the Free Software Foundation,
  19 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20 #
  21 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22 # or visit www.oracle.com if you need additional information or have any
  23 # questions.
  24 #
  25 
  26 ################################################################################
  27 # The order of these defines the priority by which we try to find them.
  28 VALID_VS_VERSIONS="2017 2013 2015 2012 2010"
  29 
  30 VS_DESCRIPTION_2010="Microsoft Visual Studio 2010"
  31 VS_VERSION_INTERNAL_2010=100
  32 VS_MSVCR_2010=msvcr100.dll
  33 # We don't use msvcp on Visual Studio 2010
  34 #VS_MSVCP_2010=msvcp100.dll
  35 VS_ENVVAR_2010="VS100COMNTOOLS"
  36 VS_VS_INSTALLDIR_2010="Microsoft Visual Studio 10.0"
  37 VS_SDK_INSTALLDIR_2010="Microsoft SDKs/Windows/v7.1"
  38 VS_VS_PLATFORM_NAME_2010="v100"
  39 VS_SDK_PLATFORM_NAME_2010="Windows7.1SDK"
  40 VS_SUPPORTED_2010=false
  41 
  42 VS_DESCRIPTION_2012="Microsoft Visual Studio 2012"
  43 VS_VERSION_INTERNAL_2012=110
  44 VS_MSVCR_2012=msvcr110.dll
  45 VS_MSVCP_2012=msvcp110.dll
  46 VS_ENVVAR_2012="VS110COMNTOOLS"
  47 VS_VS_INSTALLDIR_2012="Microsoft Visual Studio 11.0"
  48 VS_SDK_INSTALLDIR_2012=
  49 VS_VS_PLATFORM_NAME_2012="v110"
  50 VS_SDK_PLATFORM_NAME_2012=
  51 VS_SUPPORTED_2012=false
  52 
  53 VS_DESCRIPTION_2013="Microsoft Visual Studio 2013"
  54 VS_VERSION_INTERNAL_2013=120
  55 VS_MSVCR_2013=msvcr120.dll
  56 VS_MSVCP_2013=msvcp120.dll
  57 VS_ENVVAR_2013="VS120COMNTOOLS"
  58 VS_VS_INSTALLDIR_2013="Microsoft Visual Studio 12.0"
  59 VS_SDK_INSTALLDIR_2013=
  60 VS_VS_PLATFORM_NAME_2013="v120"
  61 VS_SDK_PLATFORM_NAME_2013=
  62 VS_SUPPORTED_2013=false
  63 
  64 VS_DESCRIPTION_2015="Microsoft Visual Studio 2015"
  65 VS_VERSION_INTERNAL_2015=140
  66 VS_MSVCR_2015=vcruntime140.dll
  67 VS_MSVCP_2015=msvcp140.dll
  68 VS_ENVVAR_2015="VS140COMNTOOLS"
  69 VS_VS_INSTALLDIR_2015="Microsoft Visual Studio 14.0"
  70 VS_SDK_INSTALLDIR_2015=
  71 VS_VS_PLATFORM_NAME_2015="v140"
  72 VS_SDK_PLATFORM_NAME_2015=
  73 # The vcvars of 2015 breaks if 2017 is also installed. Work around this by
  74 # explicitly specifying Windows Kit 8.1 to be used.
  75 VS_ENV_ARGS_2015="8.1"
  76 VS_SUPPORTED_2015=false
  77 
  78 VS_DESCRIPTION_2017="Microsoft Visual Studio 2017"
  79 VS_VERSION_INTERNAL_2017=141
  80 VS_MSVCR_2017=vcruntime140.dll
  81 VS_MSVCP_2017=msvcp140.dll
  82 VS_ENVVAR_2017="VS150COMNTOOLS"
  83 VS_USE_UCRT_2017="true"
  84 VS_VS_INSTALLDIR_2017="Microsoft Visual Studio/2017"
  85 VS_EDITIONS_2017="BuildTools Community Professional Enterprise"
  86 VS_SDK_INSTALLDIR_2017=
  87 VS_VS_PLATFORM_NAME_2017="v141"
  88 VS_SDK_PLATFORM_NAME_2017=
  89 VS_SUPPORTED_2017=true
  90 VS_TOOLSET_SUPPORTED_2017=true
  91 
  92 ################################################################################
  93 
  94 AC_DEFUN([TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT],
  95 [
  96   if test "x$VS_ENV_CMD" = x; then
  97     VS_VERSION="$1"
  98     VS_BASE="$2"
  99     METHOD="$3"
 100 
 101     BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(VS_BASE)
 102     # In VS 2017, the default installation is in a subdir named after the edition.
 103     # Find the first one present and use that.
 104     if test "x$VS_EDITIONS" != x; then
 105       for edition in $VS_EDITIONS; do
 106         if test -d "$VS_BASE/$edition"; then
 107           VS_BASE="$VS_BASE/$edition"
 108           break
 109         fi
 110       done
 111     fi
 112 
 113     if test -d "$VS_BASE"; then
 114       AC_MSG_NOTICE([Found Visual Studio installation at $VS_BASE using $METHOD])
 115       if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
 116         VCVARSFILES="vc/bin/vcvars32.bat vc/auxiliary/build/vcvars32.bat"
 117       else
 118         VCVARSFILES="vc/bin/amd64/vcvars64.bat vc/bin/x86_amd64/vcvarsx86_amd64.bat \
 119             VC/Auxiliary/Build/vcvarsx86_amd64.bat VC/Auxiliary/Build/vcvars64.bat"
 120       fi
 121 
 122       for VCVARSFILE in $VCVARSFILES; do
 123         if test -f "$VS_BASE/$VCVARSFILE"; then
 124           VS_ENV_CMD="$VS_BASE/$VCVARSFILE"
 125           break
 126         fi
 127       done
 128 
 129       if test "x$VS_ENV_CMD" = x; then
 130         AC_MSG_NOTICE([Warning: None of $VCVARSFILES were found, Visual Studio installation not recognized. Ignoring])
 131       else
 132         # PLATFORM_TOOLSET is used during the compilation of the freetype sources
 133         # (see 'LIB_BUILD_FREETYPE' in libraries.m4) and must be one of 'v100',
 134         # 'v110' or 'v120' for VS 2010, 2012 or VS2013
 135         eval PLATFORM_TOOLSET="\${VS_VS_PLATFORM_NAME_${VS_VERSION}}"
 136       fi
 137     fi
 138   fi
 139 ])
 140 
 141 ################################################################################
 142 
 143 AC_DEFUN([TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT],
 144 [
 145   if test "x$VS_ENV_CMD" = x; then
 146     VS_VERSION="$1"
 147     WIN_SDK_BASE="$2"
 148     METHOD="$3"
 149     BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(WIN_SDK_BASE)
 150     if test -d "$WIN_SDK_BASE"; then
 151       # There have been cases of partial or broken SDK installations. A missing
 152       # lib dir is not going to work.
 153       if test ! -d "$WIN_SDK_BASE/lib"; then
 154         AC_MSG_NOTICE([Found Windows SDK installation at $WIN_SDK_BASE using $METHOD])
 155         AC_MSG_NOTICE([Warning: Installation is broken, lib dir is missing. Ignoring])
 156       elif test -f "$WIN_SDK_BASE/Bin/SetEnv.Cmd"; then
 157         AC_MSG_NOTICE([Found Windows SDK installation at $WIN_SDK_BASE using $METHOD])
 158         VS_ENV_CMD="$WIN_SDK_BASE/Bin/SetEnv.Cmd"
 159         if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
 160           VS_ENV_ARGS="/x86"
 161         else
 162           VS_ENV_ARGS="/x64"
 163         fi
 164         # PLATFORM_TOOLSET is used during the compilation of the freetype sources (see
 165         # 'LIB_BUILD_FREETYPE' in libraries.m4) and must be 'Windows7.1SDK' for Windows7.1SDK
 166         # TODO: improve detection for other versions of SDK
 167         eval PLATFORM_TOOLSET="\${VS_SDK_PLATFORM_NAME_${VS_VERSION}}"
 168       else
 169         AC_MSG_NOTICE([Found Windows SDK installation at $WIN_SDK_BASE using $METHOD])
 170         AC_MSG_NOTICE([Warning: Installation is broken, SetEnv.Cmd is missing. Ignoring])
 171       fi
 172     fi
 173   fi
 174 ])
 175 
 176 ################################################################################
 177 # Finds the bat or cmd file in Visual Studio or the SDK that sets up a proper
 178 # build environment and assigns it to VS_ENV_CMD
 179 AC_DEFUN([TOOLCHAIN_FIND_VISUAL_STUDIO_BAT_FILE],
 180 [
 181   # VS2017 provides the option to install previous minor versions of the MSVC
 182   # toolsets. It is not possible to directly download earlier minor versions of
 183   # VS2017 and in order to build with a previous minor compiler toolset version,
 184   # it is now possible to compile with earlier minor versions by passing
 185   # -vcvars_ver=<toolset_version> argument to vcvarsall.bat.
 186   AC_ARG_WITH(msvc-toolset-version, [AS_HELP_STRING([--with-msvc-toolset-version],
 187       [specific MSVC toolset version to use, passed as -vcvars_ver argument to
 188        pass to vcvarsall.bat (Windows only)])])
 189 
 190   VS_VERSION="$1"
 191   eval VS_COMNTOOLS_VAR="\${VS_ENVVAR_${VS_VERSION}}"
 192   eval VS_COMNTOOLS="\$${VS_COMNTOOLS_VAR}"
 193   eval VS_INSTALL_DIR="\${VS_VS_INSTALLDIR_${VS_VERSION}}"
 194   eval VS_EDITIONS="\${VS_EDITIONS_${VS_VERSION}}"
 195   eval SDK_INSTALL_DIR="\${VS_SDK_INSTALLDIR_${VS_VERSION}}"
 196   eval VS_ENV_ARGS="\${VS_ENV_ARGS_${VS_VERSION}}"
 197   eval VS_TOOLSET_SUPPORTED="\${VS_TOOLSET_SUPPORTED_${VS_VERSION}}"
 198 
 199   # When using --with-tools-dir, assume it points to the correct and default
 200   # version of Visual Studio or that --with-toolchain-version was also set.
 201   if test "x$with_tools_dir" != x; then
 202     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 203         [$with_tools_dir/../..], [--with-tools-dir])
 204     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 205         [$with_tools_dir/../../..], [--with-tools-dir])
 206     if test "x$VS_ENV_CMD" = x; then
 207       # Having specified an argument which is incorrect will produce an instant failure;
 208       # we should not go on looking
 209       AC_MSG_NOTICE([The path given by --with-tools-dir does not contain a valid])
 210       AC_MSG_NOTICE([Visual Studio installation. Please point to the VC/bin or VC/bin/amd64])
 211       AC_MSG_NOTICE([directory within the Visual Studio installation])
 212       AC_MSG_ERROR([Cannot locate a valid Visual Studio installation])
 213     fi
 214   fi
 215 
 216   VS_ENV_CMD=""
 217 
 218   if test "x$VS_COMNTOOLS" != x; then
 219     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 220         [$VS_COMNTOOLS/../..], [$VS_COMNTOOLS_VAR variable])
 221   fi
 222   if test "x$PROGRAMFILES" != x; then
 223     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 224         [$PROGRAMFILES/$VS_INSTALL_DIR], [well-known name])
 225   fi
 226   # Work around the insanely named ProgramFiles(x86) env variable
 227   PROGRAMFILES_X86="`env | $SED -n 's/^ProgramFiles(x86)=//p'`"
 228   if test "x$PROGRAMFILES_X86" != x; then
 229     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 230         [$PROGRAMFILES_X86/$VS_INSTALL_DIR], [well-known name])
 231   fi
 232   TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 233       [C:/Program Files/$VS_INSTALL_DIR], [well-known name])
 234   TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 235       [C:/Program Files (x86)/$VS_INSTALL_DIR], [well-known name])
 236   if test "x$SDK_INSTALL_DIR" != x; then
 237     if test "x$ProgramW6432" != x; then
 238       TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 239           [$ProgramW6432/$SDK_INSTALL_DIR], [well-known name])
 240     fi
 241     if test "x$PROGRAMW6432" != x; then
 242       TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 243           [$PROGRAMW6432/$SDK_INSTALL_DIR], [well-known name])
 244     fi
 245     if test "x$PROGRAMFILES" != x; then
 246       TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 247           [$PROGRAMFILES/$SDK_INSTALL_DIR], [well-known name])
 248     fi
 249     TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 250         [C:/Program Files/$SDK_INSTALL_DIR], [well-known name])
 251     TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 252         [C:/Program Files (x86)/$SDK_INSTALL_DIR], [well-known name])
 253   fi
 254 
 255   if test "x$VS_TOOLSET_SUPPORTED" != x; then
 256     if test "x$with_msvc_toolset_version" != x; then
 257       VS_ENV_ARGS="$VS_ENV_ARGS -vcvars_ver=$with_msvc_toolset_version"
 258     fi
 259   fi
 260 ])
 261 
 262 ################################################################################
 263 
 264 AC_DEFUN([TOOLCHAIN_FIND_VISUAL_STUDIO],
 265 [
 266   AC_ARG_WITH(toolchain-version, [AS_HELP_STRING([--with-toolchain-version],
 267       [the version of the toolchain to look for, use '--help' to show possible values @<:@platform dependent@:>@])])
 268 
 269   if test "x$with_toolchain_version" = xlist; then
 270     # List all toolchains
 271     AC_MSG_NOTICE([The following toolchain versions are valid on this platform:])
 272     for version in $VALID_VS_VERSIONS; do
 273       eval VS_DESCRIPTION=\${VS_DESCRIPTION_$version}
 274       $PRINTF "  %-10s  %s\n" $version "$VS_DESCRIPTION"
 275     done
 276 
 277     exit 0
 278   elif test "x$DEVKIT_VS_VERSION" != x; then
 279     VS_VERSION=$DEVKIT_VS_VERSION
 280     TOOLCHAIN_VERSION=$VS_VERSION
 281     # If the devkit has a name, use that as description
 282     VS_DESCRIPTION="$DEVKIT_NAME"
 283     if test "x$VS_DESCRIPTION" = x; then
 284       eval VS_DESCRIPTION="\${VS_DESCRIPTION_${VS_VERSION}}"
 285     fi
 286     eval VS_VERSION_INTERNAL="\${VS_VERSION_INTERNAL_${VS_VERSION}}"
 287     eval MSVCR_NAME="\${VS_MSVCR_${VS_VERSION}}"
 288     eval MSVCP_NAME="\${VS_MSVCP_${VS_VERSION}}"
 289     eval USE_UCRT="\${VS_USE_UCRT_${VS_VERSION}}"
 290     eval VS_SUPPORTED="\${VS_SUPPORTED_${VS_VERSION}}"
 291     eval PLATFORM_TOOLSET="\${VS_VS_PLATFORM_NAME_${VS_VERSION}}"
 292 
 293     # The TOOLCHAIN_PATH from a devkit is in Unix format. In WSL we need a
 294     # windows version of the complete VS_PATH as VS_PATH_WINDOWS
 295     if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 296       # Convert the toolchain path
 297       OLDIFS="$IFS"
 298       IFS=":"
 299       VS_PATH_WINDOWS=""
 300       for i in $TOOLCHAIN_PATH; do
 301         path=$i
 302         BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([path])
 303         VS_PATH_WINDOWS="$VS_PATH_WINDOWS;$path"
 304       done
 305       IFS="$OLDIFS"
 306       # Append the current path from Windows env
 307       WINDOWS_PATH="`$CMD /c echo %PATH%`"
 308       VS_PATH_WINDOWS="$VS_PATH_WINDOWS;$WINDOWS_PATH"
 309     else
 310       VS_PATH="$TOOLCHAIN_PATH:$PATH"
 311     fi
 312 
 313     # Convert DEVKIT_VS_INCLUDE into windows style VS_INCLUDE so that it
 314     # can still be exported as INCLUDE for compiler invocations without
 315     # SYSROOT_CFLAGS
 316     OLDIFS="$IFS"
 317     IFS=";"
 318     for i in $DEVKIT_VS_INCLUDE; do
 319       ipath=$i
 320       BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([ipath])
 321       VS_INCLUDE="$VS_INCLUDE;$ipath"
 322     done
 323     # Convert DEVKIT_VS_LIB into VS_LIB so that it can still be exported
 324     # as LIB for compiler invocations without SYSROOT_LDFLAGS
 325     for i in $DEVKIT_VS_LIB; do
 326       libpath=$i
 327       BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([libpath])
 328       VS_LIB="$VS_LIB;$libpath"
 329     done
 330     IFS="$OLDIFS"
 331 
 332     AC_MSG_NOTICE([Found devkit $VS_DESCRIPTION])
 333 
 334   elif test "x$with_toolchain_version" != x; then
 335     # User override; check that it is valid
 336     if test "x${VALID_VS_VERSIONS/$with_toolchain_version/}" = "x${VALID_VS_VERSIONS}"; then
 337       AC_MSG_NOTICE([Visual Studio version $with_toolchain_version is not valid.])
 338       AC_MSG_NOTICE([Valid Visual Studio versions: $VALID_VS_VERSIONS.])
 339       AC_MSG_ERROR([Cannot continue.])
 340     fi
 341     VS_VERSIONS_PROBE_LIST="$with_toolchain_version"
 342   else
 343     # No flag given, use default
 344     VS_VERSIONS_PROBE_LIST="$VALID_VS_VERSIONS"
 345   fi
 346 
 347   for VS_VERSION in $VS_VERSIONS_PROBE_LIST; do
 348     TOOLCHAIN_FIND_VISUAL_STUDIO_BAT_FILE([$VS_VERSION])
 349     if test "x$VS_ENV_CMD" != x; then
 350       TOOLCHAIN_VERSION=$VS_VERSION
 351       eval VS_DESCRIPTION="\${VS_DESCRIPTION_${VS_VERSION}}"
 352       eval VS_VERSION_INTERNAL="\${VS_VERSION_INTERNAL_${VS_VERSION}}"
 353       eval MSVCR_NAME="\${VS_MSVCR_${VS_VERSION}}"
 354       eval MSVCP_NAME="\${VS_MSVCP_${VS_VERSION}}"
 355       eval USE_UCRT="\${VS_USE_UCRT_${VS_VERSION}}"
 356       eval VS_SUPPORTED="\${VS_SUPPORTED_${VS_VERSION}}"
 357       # The rest of the variables are already evaled while probing
 358       AC_MSG_NOTICE([Found $VS_DESCRIPTION])
 359       break
 360     fi
 361   done
 362 
 363   TOOLCHAIN_DESCRIPTION="$VS_DESCRIPTION"
 364   if test "x$VS_SUPPORTED" = "xfalse"; then
 365     UNSUPPORTED_TOOLCHAIN_VERSION=yes
 366   fi
 367 ])
 368 
 369 ################################################################################
 370 # Check if the VS env variables were setup prior to running configure.
 371 # If not, then find vcvarsall.bat and run it automatically, and integrate
 372 # the set env variables into the spec file.
 373 AC_DEFUN([TOOLCHAIN_SETUP_VISUAL_STUDIO_ENV],
 374 [
 375   # Store path to cygwin link.exe to help excluding it when searching for
 376   # VS linker. This must be done before changing the PATH when looking for VS.
 377   AC_PATH_PROG(CYGWIN_LINK, link.exe)
 378   if test "x$CYGWIN_LINK" != x; then
 379     AC_MSG_CHECKING([if the first found link.exe is actually the Cygwin link tool])
 380     "$CYGWIN_LINK" --version > /dev/null
 381     if test $? -eq 0 ; then
 382       AC_MSG_RESULT([yes])
 383     else
 384       AC_MSG_RESULT([no])
 385       # This might be the VS linker. Don't exclude it later on.
 386       CYGWIN_LINK=""
 387     fi
 388   fi
 389 
 390   # First-hand choice is to locate and run the vsvars bat file.
 391   TOOLCHAIN_FIND_VISUAL_STUDIO
 392 
 393   # If we have a devkit, skip all of the below.
 394   if test "x$DEVKIT_VS_VERSION" = x; then
 395     if test "x$VS_ENV_CMD" != x; then
 396       # We have found a Visual Studio environment on disk, let's extract variables from the vsvars bat file.
 397       BASIC_FIXUP_EXECUTABLE(VS_ENV_CMD)
 398 
 399       # Lets extract the variables that are set by vcvarsall.bat/vsvars32.bat/vsvars64.bat
 400       AC_MSG_NOTICE([Trying to extract Visual Studio environment variables])
 401 
 402       # We need to create a couple of temporary files.
 403       VS_ENV_TMP_DIR="$CONFIGURESUPPORT_OUTPUTDIR/vs-env"
 404       $MKDIR -p $VS_ENV_TMP_DIR
 405 
 406       # Cannot use the VS10 setup script directly (since it only updates the DOS subshell environment).
 407       # Instead create a shell script which will set the relevant variables when run.
 408       WINPATH_VS_ENV_CMD="$VS_ENV_CMD"
 409       BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([WINPATH_VS_ENV_CMD])
 410 
 411       if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 412         WINPATH_BASH="bash"
 413       else
 414         WINPATH_BASH="$BASH"
 415         BASIC_WINDOWS_REWRITE_AS_WINDOWS_MIXED_PATH([WINPATH_BASH])
 416       fi
 417 
 418       # Generate a DOS batch file which runs $VS_ENV_CMD, and then creates a shell
 419       # script (executable by bash) that will setup the important variables.
 420       EXTRACT_VC_ENV_BAT_FILE="$VS_ENV_TMP_DIR/extract-vs-env.bat"
 421       $ECHO "@echo off" >  $EXTRACT_VC_ENV_BAT_FILE
 422       # This will end up something like:
 423       # call C:/progra~2/micros~2.0/vc/bin/amd64/vcvars64.bat
 424       $ECHO "call \"$WINPATH_VS_ENV_CMD\" $VS_ENV_ARGS" >> $EXTRACT_VC_ENV_BAT_FILE
 425       # In some cases, the VS_ENV_CMD will change directory, change back so
 426       # the set-vs-env.sh ends up in the right place.
 427       $ECHO 'cd %~dp0' >> $EXTRACT_VC_ENV_BAT_FILE
 428       if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 429         # These will end up something like:
 430         # echo VS_PATH=\"$PATH\" > set-vs-env.sh
 431         # The trailing space for everyone except PATH is no typo, but is needed due
 432         # to trailing \ in the Windows paths. These will be stripped later.
 433         # Trying pure CMD extract. This results in windows paths that need to
 434         # be converted post extraction, but a simpler script.
 435         $ECHO 'echo VS_PATH="%PATH%" > set-vs-env.sh' \
 436             >> $EXTRACT_VC_ENV_BAT_FILE
 437         $ECHO 'echo VS_INCLUDE="%INCLUDE% " >> set-vs-env.sh' \
 438             >> $EXTRACT_VC_ENV_BAT_FILE
 439         $ECHO 'echo VS_LIB="%LIB% " >> set-vs-env.sh' \
 440             >> $EXTRACT_VC_ENV_BAT_FILE
 441         $ECHO 'echo VCINSTALLDIR="%VCINSTALLDIR% " >> set-vs-env.sh' \
 442             >> $EXTRACT_VC_ENV_BAT_FILE
 443         $ECHO 'echo VCToolsRedistDir="%VCToolsRedistDir% " >> set-vs-env.sh' \
 444             >> $EXTRACT_VC_ENV_BAT_FILE
 445         $ECHO 'echo WindowsSdkDir="%WindowsSdkDir% " >> set-vs-env.sh' \
 446             >> $EXTRACT_VC_ENV_BAT_FILE
 447         $ECHO 'echo WINDOWSSDKDIR="%WINDOWSSDKDIR% " >> set-vs-env.sh' \
 448             >> $EXTRACT_VC_ENV_BAT_FILE
 449       else
 450         # These will end up something like:
 451         # C:/CygWin/bin/bash -c 'echo VS_PATH=\"$PATH\" > localdevenv.sh
 452         # The trailing space for everyone except PATH is no typo, but is needed due
 453         # to trailing \ in the Windows paths. These will be stripped later.
 454         $ECHO "$WINPATH_BASH -c 'echo VS_PATH="'\"$PATH\" > set-vs-env.sh' \
 455             >> $EXTRACT_VC_ENV_BAT_FILE
 456         $ECHO "$WINPATH_BASH -c 'echo VS_INCLUDE="'\"$INCLUDE\;$include \" >> set-vs-env.sh' \
 457             >> $EXTRACT_VC_ENV_BAT_FILE
 458         $ECHO "$WINPATH_BASH -c 'echo VS_LIB="'\"$LIB\;$lib \" >> set-vs-env.sh' \
 459             >> $EXTRACT_VC_ENV_BAT_FILE
 460         $ECHO "$WINPATH_BASH -c 'echo VCINSTALLDIR="'\"$VCINSTALLDIR \" >> set-vs-env.sh' \
 461             >> $EXTRACT_VC_ENV_BAT_FILE
 462         $ECHO "$WINPATH_BASH -c 'echo VCToolsRedistDir="'\"$VCToolsRedistDir \" >> set-vs-env.sh' \
 463             >> $EXTRACT_VC_ENV_BAT_FILE
 464         $ECHO "$WINPATH_BASH -c 'echo WindowsSdkDir="'\"$WindowsSdkDir \" >> set-vs-env.sh' \
 465             >> $EXTRACT_VC_ENV_BAT_FILE
 466         $ECHO "$WINPATH_BASH -c 'echo WINDOWSSDKDIR="'\"$WINDOWSSDKDIR \" >> set-vs-env.sh' \
 467             >> $EXTRACT_VC_ENV_BAT_FILE
 468       fi
 469 
 470       # Now execute the newly created bat file.
 471       # The | cat is to stop SetEnv.Cmd to mess with system colors on msys.
 472       # Change directory so we don't need to mess with Windows paths in redirects.
 473       cd $VS_ENV_TMP_DIR
 474       $CMD /c extract-vs-env.bat | $CAT
 475       cd $CURDIR
 476 
 477       if test ! -s $VS_ENV_TMP_DIR/set-vs-env.sh; then
 478         AC_MSG_NOTICE([Could not succesfully extract the environment variables needed for the VS setup.])
 479         AC_MSG_NOTICE([Try setting --with-tools-dir to the VC/bin directory within the VS installation])
 480         AC_MSG_NOTICE([or run "bash.exe -l" from a VS command prompt and then run configure from there.])
 481         AC_MSG_ERROR([Cannot continue])
 482       fi
 483 
 484       # Remove windows line endings
 485       $SED -i -e 's|\r||g' $VS_ENV_TMP_DIR/set-vs-env.sh
 486 
 487       # Now set all paths and other env variables. This will allow the rest of
 488       # the configure script to find and run the compiler in the proper way.
 489       AC_MSG_NOTICE([Setting extracted environment variables])
 490       . $VS_ENV_TMP_DIR/set-vs-env.sh
 491       # Now we have VS_PATH, VS_INCLUDE, VS_LIB. For further checking, we
 492       # also define VCINSTALLDIR, WindowsSdkDir and WINDOWSSDKDIR.
 493 
 494       # In WSL, the extracted VS_PATH is Windows style. This needs to be
 495       # rewritten as Unix style and the Windows style version is saved
 496       # in VS_PATH_WINDOWS.
 497       if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 498         OLDIFS="$IFS"
 499         IFS=";"
 500         # Convert VS_PATH to unix style
 501         VS_PATH_WINDOWS="$VS_PATH"
 502         VS_PATH=""
 503         for i in $VS_PATH_WINDOWS; do
 504           path=$i
 505           # Only process non-empty elements
 506           if test "x$path" != x; then
 507             IFS="$OLDIFS"
 508             # Check that directory exists before calling fixup_path
 509             testpath=$path
 510             BASIC_WINDOWS_REWRITE_AS_UNIX_PATH([testpath])
 511             if test -d "$testpath"; then
 512               BASIC_FIXUP_PATH([path])
 513               BASIC_APPEND_TO_PATH(VS_PATH, $path)
 514             fi
 515             IFS=";"
 516           fi
 517         done
 518         IFS="$OLDIFS"
 519       fi
 520 
 521     else
 522       # We did not find a vsvars bat file, let's hope we are run from a VS command prompt.
 523       AC_MSG_NOTICE([Cannot locate a valid Visual Studio installation, checking current environment])
 524     fi
 525   fi
 526 
 527   # At this point, we should have correct variables in the environment, or we can't continue.
 528   AC_MSG_CHECKING([for Visual Studio variables])
 529 
 530   if test "x$VCINSTALLDIR" != x || test "x$WindowsSDKDir" != x \
 531       || test "x$WINDOWSSDKDIR" != x || test "x$DEVKIT_NAME" != x; then
 532     if test "x$VS_INCLUDE" = x || test "x$VS_LIB" = x; then
 533       AC_MSG_RESULT([present but broken])
 534       AC_MSG_ERROR([Your VC command prompt seems broken, INCLUDE and/or LIB is missing.])
 535     else
 536       AC_MSG_RESULT([ok])
 537       # Remove any trailing "\" ";" and " " from the variables.
 538       VS_INCLUDE=`$ECHO "$VS_INCLUDE" | $SED -e 's/\\\\*;* *$//'`
 539       VS_LIB=`$ECHO "$VS_LIB" | $SED 's/\\\\*;* *$//'`
 540       VCINSTALLDIR=`$ECHO "$VCINSTALLDIR" | $SED 's/\\\\* *$//'`
 541       VCToolsRedistDir=`$ECHO "$VCToolsRedistDir" | $SED 's/\\\\* *$//'`
 542       WindowsSdkDir=`$ECHO "$WindowsSdkDir" | $SED 's/\\\\* *$//'`
 543       WINDOWSSDKDIR=`$ECHO "$WINDOWSSDKDIR" | $SED 's/\\\\* *$//'`
 544       if test -z "$WINDOWSSDKDIR"; then
 545         WINDOWSSDKDIR="$WindowsSdkDir"
 546       fi
 547       # Remove any paths containing # (typically F#) as that messes up make. This
 548       # is needed if visual studio was installed with F# support.
 549       VS_PATH=`$ECHO "$VS_PATH" | $SED 's/[[^:#]]*#[^:]*://g'`
 550 
 551       AC_SUBST(VS_PATH)
 552       AC_SUBST(VS_INCLUDE)
 553       AC_SUBST(VS_LIB)
 554 
 555       # Convert VS_INCLUDE into SYSROOT_CFLAGS
 556       OLDIFS="$IFS"
 557       IFS=";"
 558       for i in $VS_INCLUDE; do
 559         ipath=$i
 560         # Only process non-empty elements
 561         if test "x$ipath" != x; then
 562           IFS="$OLDIFS"
 563           # Check that directory exists before calling fixup_path
 564           testpath=$ipath
 565           BASIC_WINDOWS_REWRITE_AS_UNIX_PATH([testpath])
 566           if test -d "$testpath"; then
 567             BASIC_FIXUP_PATH([ipath])
 568             SYSROOT_CFLAGS="$SYSROOT_CFLAGS -I$ipath"
 569           fi
 570           IFS=";"
 571         fi
 572       done
 573       # Convert VS_LIB into SYSROOT_LDFLAGS
 574       for i in $VS_LIB; do
 575         libpath=$i
 576         # Only process non-empty elements
 577         if test "x$libpath" != x; then
 578           IFS="$OLDIFS"
 579           # Check that directory exists before calling fixup_path
 580           testpath=$libpath
 581           BASIC_WINDOWS_REWRITE_AS_UNIX_PATH([testpath])
 582           if test -d "$testpath"; then
 583             BASIC_FIXUP_PATH([libpath])
 584             SYSROOT_LDFLAGS="$SYSROOT_LDFLAGS -libpath:$libpath"
 585           fi
 586           IFS=";"
 587         fi
 588       done
 589       IFS="$OLDIFS"
 590 
 591       AC_SUBST(VS_PATH_WINDOWS)
 592     fi
 593   else
 594     AC_MSG_RESULT([not found])
 595 
 596     if test "x$VS_ENV_CMD" = x; then
 597       AC_MSG_NOTICE([Cannot locate a valid Visual Studio or Windows SDK installation on disk,])
 598       AC_MSG_NOTICE([nor is this script run from a Visual Studio command prompt.])
 599     else
 600       AC_MSG_NOTICE([Running the extraction script failed.])
 601     fi
 602     AC_MSG_NOTICE([Try setting --with-tools-dir to the VC/bin directory within the VS installation])
 603     AC_MSG_NOTICE([or run "bash.exe -l" from a VS command prompt and then run configure from there.])
 604     AC_MSG_ERROR([Cannot continue])
 605   fi
 606 ])
 607 
 608 AC_DEFUN([TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL],
 609 [
 610   DLL_NAME="$1"
 611   POSSIBLE_MSVC_DLL="$2"
 612   METHOD="$3"
 613   if test -n "$POSSIBLE_MSVC_DLL" -a -e "$POSSIBLE_MSVC_DLL"; then
 614     AC_MSG_NOTICE([Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD])
 615 
 616     # Need to check if the found msvcr is correct architecture
 617     AC_MSG_CHECKING([found $DLL_NAME architecture])
 618     MSVC_DLL_FILETYPE=`$FILE -b "$POSSIBLE_MSVC_DLL"`
 619     if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
 620       # The MSYS 'file' command returns "PE32 executable for MS Windows (DLL) (GUI) Intel 80386 32-bit"
 621       # on x32 and "PE32+ executable for MS Windows (DLL) (GUI) Mono/.Net assembly" on x64 systems.
 622       if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
 623         CORRECT_MSVCR_ARCH="PE32 executable"
 624       else
 625         CORRECT_MSVCR_ARCH="PE32+ executable"
 626       fi
 627     else
 628       if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
 629         CORRECT_MSVCR_ARCH=386
 630       else
 631         CORRECT_MSVCR_ARCH=x86-64
 632       fi
 633     fi
 634     if $ECHO "$MSVC_DLL_FILETYPE" | $GREP "$CORRECT_MSVCR_ARCH" 2>&1 > /dev/null; then
 635       AC_MSG_RESULT([ok])
 636       MSVC_DLL="$POSSIBLE_MSVC_DLL"
 637       AC_MSG_CHECKING([for $DLL_NAME])
 638       AC_MSG_RESULT([$MSVC_DLL])
 639     else
 640       AC_MSG_RESULT([incorrect, ignoring])
 641       AC_MSG_NOTICE([The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE])
 642     fi
 643   fi
 644 ])
 645 
 646 AC_DEFUN([TOOLCHAIN_SETUP_MSVC_DLL],
 647 [
 648   DLL_NAME="$1"
 649   MSVC_DLL=
 650 
 651   if test "x$MSVC_DLL" = x; then
 652     if test "x$VCINSTALLDIR" != x; then
 653       CYGWIN_VC_INSTALL_DIR="$VCINSTALLDIR"
 654       BASIC_FIXUP_PATH(CYGWIN_VC_INSTALL_DIR)
 655       if test "$VS_VERSION" -lt 2017; then
 656         # Probe: Using well-known location from Visual Studio 12.0 and older
 657         if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
 658           POSSIBLE_MSVC_DLL="$CYGWIN_VC_INSTALL_DIR/redist/x64/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME"
 659         else
 660           POSSIBLE_MSVC_DLL="$CYGWIN_VC_INSTALL_DIR/redist/x86/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME"
 661         fi
 662       else
 663         CYGWIN_VC_TOOLS_REDIST_DIR="$VCToolsRedistDir"
 664         BASIC_FIXUP_PATH(CYGWIN_VC_TOOLS_REDIST_DIR)
 665         # Probe: Using well-known location from VS 2017
 666         if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
 667           POSSIBLE_MSVC_DLL="`ls $CYGWIN_VC_TOOLS_REDIST_DIR/x64/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME`"
 668         else
 669           POSSIBLE_MSVC_DLL="`ls $CYGWIN_VC_TOOLS_REDIST_DIR/x86/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME`"
 670         fi
 671       fi
 672       # In case any of the above finds more than one file, loop over them.
 673       for possible_msvc_dll in $POSSIBLE_MSVC_DLL; do
 674         $ECHO "POSSIBLE_MSVC_DLL $possible_msvc_dll"
 675         TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$possible_msvc_dll],
 676             [well-known location in VCINSTALLDIR])
 677       done
 678     fi
 679   fi
 680 
 681   if test "x$MSVC_DLL" = x; then
 682     # Probe: Check in the Boot JDK directory.
 683     POSSIBLE_MSVC_DLL="$BOOT_JDK/bin/$DLL_NAME"
 684     TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$POSSIBLE_MSVC_DLL],
 685         [well-known location in Boot JDK])
 686   fi
 687 
 688   if test "x$MSVC_DLL" = x; then
 689     # Probe: Look in the Windows system32 directory
 690     CYGWIN_SYSTEMROOT="$SYSTEMROOT"
 691     BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(CYGWIN_SYSTEMROOT)
 692     POSSIBLE_MSVC_DLL="$CYGWIN_SYSTEMROOT/system32/$DLL_NAME"
 693     TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$POSSIBLE_MSVC_DLL],
 694         [well-known location in SYSTEMROOT])
 695   fi
 696 
 697   if test "x$MSVC_DLL" = x; then
 698     # Probe: If Visual Studio Express is installed, there is usually one with the debugger
 699     if test "x$VS100COMNTOOLS" != x; then
 700       CYGWIN_VS_TOOLS_DIR="$VS100COMNTOOLS/.."
 701       BASIC_WINDOWS_REWRITE_AS_UNIX_PATH(CYGWIN_VS_TOOLS_DIR)
 702       if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
 703         POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VS_TOOLS_DIR" -name $DLL_NAME \
 704         | $GREP -i /x64/ | $HEAD --lines 1`
 705       else
 706         POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VS_TOOLS_DIR" -name $DLL_NAME \
 707         | $GREP -i /x86/ | $HEAD --lines 1`
 708       fi
 709       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$POSSIBLE_MSVC_DLL],
 710           [search of VS100COMNTOOLS])
 711     fi
 712   fi
 713 
 714   if test "x$MSVC_DLL" = x; then
 715     # Probe: Search wildly in the VCINSTALLDIR. We've probably lost by now.
 716     # (This was the original behaviour; kept since it might turn something up)
 717     if test "x$CYGWIN_VC_INSTALL_DIR" != x; then
 718       if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
 719         POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VC_INSTALL_DIR" -name $DLL_NAME \
 720         | $GREP x64 | $HEAD --lines 1`
 721       else
 722         POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VC_INSTALL_DIR" -name $DLL_NAME \
 723         | $GREP x86 | $GREP -v ia64 | $GREP -v x64 | $HEAD --lines 1`
 724         if test "x$POSSIBLE_MSVC_DLL" = x; then
 725           # We're grasping at straws now...
 726           POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VC_INSTALL_DIR" -name $DLL_NAME \
 727           | $HEAD --lines 1`
 728         fi
 729       fi
 730 
 731       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$POSSIBLE_MSVC_DLL],
 732           [search of VCINSTALLDIR])
 733     fi
 734   fi
 735 
 736   if test "x$MSVC_DLL" = x; then
 737     AC_MSG_CHECKING([for $DLL_NAME])
 738     AC_MSG_RESULT([no])
 739     AC_MSG_ERROR([Could not find $DLL_NAME. Please specify using --with-msvcr-dll.])
 740   fi
 741 ])
 742 
 743 AC_DEFUN([TOOLCHAIN_SETUP_VS_RUNTIME_DLLS],
 744 [
 745   AC_ARG_WITH(msvcr-dll, [AS_HELP_STRING([--with-msvcr-dll],
 746       [path to microsoft C runtime dll (msvcr*.dll) (Windows only) @<:@probed@:>@])])
 747 
 748   if test "x$with_msvcr_dll" != x; then
 749     # If given explicitly by user, do not probe. If not present, fail directly.
 750     TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($MSVCR_NAME, [$with_msvcr_dll], [--with-msvcr-dll])
 751     if test "x$MSVC_DLL" = x; then
 752       AC_MSG_ERROR([Could not find a proper $MSVCR_NAME as specified by --with-msvcr-dll])
 753     fi
 754     MSVCR_DLL="$MSVC_DLL"
 755   elif test "x$DEVKIT_MSVCR_DLL" != x; then
 756     TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($MSVCR_NAME, [$DEVKIT_MSVCR_DLL], [devkit])
 757     if test "x$MSVC_DLL" = x; then
 758       AC_MSG_ERROR([Could not find a proper $MSVCR_NAME as specified by devkit])
 759     fi
 760     MSVCR_DLL="$MSVC_DLL"
 761   else
 762     TOOLCHAIN_SETUP_MSVC_DLL([${MSVCR_NAME}])
 763     MSVCR_DLL="$MSVC_DLL"
 764   fi
 765   AC_SUBST(MSVCR_DLL)
 766 
 767   AC_ARG_WITH(msvcp-dll, [AS_HELP_STRING([--with-msvcp-dll],
 768       [path to microsoft C++ runtime dll (msvcp*.dll) (Windows only) @<:@probed@:>@])])
 769 
 770   if test "x$MSVCP_NAME" != "x"; then
 771     if test "x$with_msvcp_dll" != x; then
 772       # If given explicitly by user, do not probe. If not present, fail directly.
 773       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($MSVCP_NAME, [$with_msvcp_dll], [--with-msvcp-dll])
 774       if test "x$MSVC_DLL" = x; then
 775         AC_MSG_ERROR([Could not find a proper $MSVCP_NAME as specified by --with-msvcp-dll])
 776       fi
 777       MSVCP_DLL="$MSVC_DLL"
 778     elif test "x$DEVKIT_MSVCP_DLL" != x; then
 779       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($MSVCP_NAME, [$DEVKIT_MSVCP_DLL], [devkit])
 780       if test "x$MSVC_DLL" = x; then
 781         AC_MSG_ERROR([Could not find a proper $MSVCP_NAME as specified by devkit])
 782       fi
 783       MSVCP_DLL="$MSVC_DLL"
 784     else
 785       TOOLCHAIN_SETUP_MSVC_DLL([${MSVCP_NAME}])
 786       MSVCP_DLL="$MSVC_DLL"
 787     fi
 788     AC_SUBST(MSVCP_DLL)
 789   fi
 790 
 791   AC_ARG_WITH(ucrt-dll-dir, [AS_HELP_STRING([--with-ucrt-dll-dir],
 792       [path to Microsoft Windows Kit UCRT DLL dir (Windows only) @<:@probed@:>@])])
 793 
 794   if test "x$USE_UCRT" = "xtrue"; then
 795     AC_MSG_CHECKING([for UCRT DLL dir])
 796     if test "x$with_ucrt_dll_dir" != x; then
 797       if test -z "$(ls -d $with_ucrt_dll_dir/*.dll 2> /dev/null)"; then
 798         AC_MSG_RESULT([no])
 799         AC_MSG_ERROR([Could not find any dlls in $with_ucrt_dll_dir])
 800       else
 801         AC_MSG_RESULT([$with_ucrt_dll_dir])
 802         UCRT_DLL_DIR="$with_ucrt_dll_dir"
 803         BASIC_FIXUP_PATH([UCRT_DLL_DIR])
 804       fi
 805     elif test "x$DEVKIT_UCRT_DLL_DIR" != "x"; then
 806       UCRT_DLL_DIR="$DEVKIT_UCRT_DLL_DIR"
 807       AC_MSG_RESULT($UCRT_DLL_DIR)
 808     else
 809       CYGWIN_WINDOWSSDKDIR="${WINDOWSSDKDIR}"
 810       BASIC_FIXUP_PATH([CYGWIN_WINDOWSSDKDIR])
 811       dll_subdir=$OPENJDK_TARGET_CPU
 812       if test "x$dll_subdir" = "xx86_64"; then
 813         dll_subdir="x64"
 814       fi
 815       UCRT_DLL_DIR="$CYGWIN_WINDOWSSDKDIR/Redist/ucrt/DLLs/$dll_subdir"
 816       if test -z "$(ls -d "$UCRT_DLL_DIR/"*.dll 2> /dev/null)"; then
 817         # Try with version subdir
 818         UCRT_DLL_DIR="`ls -d $CYGWIN_WINDOWSSDKDIR/Redist/*/ucrt/DLLs/$dll_subdir \
 819             2> /dev/null | $SORT -d | $HEAD -n1`"
 820         if test -z "$UCRT_DLL_DIR" \
 821             || test -z "$(ls -d "$UCRT_DLL_DIR/"*.dll 2> /dev/null)"; then
 822           AC_MSG_RESULT([no])
 823           AC_MSG_ERROR([Could not find any dlls in $UCRT_DLL_DIR])
 824         else
 825           AC_MSG_RESULT($UCRT_DLL_DIR)
 826         fi
 827       else
 828         AC_MSG_RESULT($UCRT_DLL_DIR)
 829       fi
 830     fi
 831   else
 832     UCRT_DLL_DIR=
 833   fi
 834   AC_SUBST(UCRT_DLL_DIR)
 835 ])