1 #
   2 # Copyright (c) 2011, 2020, 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="2019 2017"
  29 
  30 VS_DESCRIPTION_2017="Microsoft Visual Studio 2017"
  31 VS_VERSION_INTERNAL_2017=141
  32 VS_MSVCR_2017=vcruntime140.dll
  33 VS_MSVCP_2017=msvcp140.dll
  34 VS_ENVVAR_2017="VS150COMNTOOLS"
  35 VS_USE_UCRT_2017="true"
  36 VS_VS_INSTALLDIR_2017="Microsoft Visual Studio/2017"
  37 VS_EDITIONS_2017="BuildTools Community Professional Enterprise"
  38 VS_SDK_INSTALLDIR_2017=
  39 VS_VS_PLATFORM_NAME_2017="v141"
  40 VS_SDK_PLATFORM_NAME_2017=
  41 VS_SUPPORTED_2017=true
  42 VS_TOOLSET_SUPPORTED_2017=true
  43 
  44 VS_DESCRIPTION_2019="Microsoft Visual Studio 2019"
  45 VS_VERSION_INTERNAL_2019=142
  46 VS_MSVCR_2019=vcruntime140.dll
  47 VS_VCRUNTIME_1_2019=vcruntime140_1.dll
  48 VS_MSVCP_2019=msvcp140.dll
  49 VS_ENVVAR_2019="VS160COMNTOOLS"
  50 VS_USE_UCRT_2019="true"
  51 VS_VS_INSTALLDIR_2019="Microsoft Visual Studio/2019"
  52 VS_EDITIONS_2019="BuildTools Community Professional Enterprise"
  53 VS_SDK_INSTALLDIR_2019=
  54 VS_VS_PLATFORM_NAME_2019="v142"
  55 VS_SDK_PLATFORM_NAME_2019=
  56 VS_SUPPORTED_2019=true
  57 VS_TOOLSET_SUPPORTED_2019=true
  58 
  59 ################################################################################
  60 
  61 AC_DEFUN([TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT],
  62 [
  63   if test "x$VS_ENV_CMD" = x; then
  64     VS_VERSION="$1"
  65     VS_BASE="$2"
  66     METHOD="$3"
  67 
  68     UTIL_REWRITE_AS_UNIX_PATH(VS_BASE)
  69     # In VS 2017 and VS 2019, the default installation is in a subdir named after the edition.
  70     # Find the first one present and use that.
  71     if test "x$VS_EDITIONS" != x; then
  72       for edition in $VS_EDITIONS; do
  73         if test -d "$VS_BASE/$edition"; then
  74           VS_BASE="$VS_BASE/$edition"
  75           break
  76         fi
  77       done
  78     fi
  79 
  80     if test -d "$VS_BASE"; then
  81       AC_MSG_NOTICE([Found Visual Studio installation at $VS_BASE using $METHOD])
  82       if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
  83         VCVARSFILES="vc/bin/vcvars32.bat vc/auxiliary/build/vcvars32.bat"
  84       else
  85         VCVARSFILES="vc/bin/amd64/vcvars64.bat vc/bin/x86_amd64/vcvarsx86_amd64.bat \
  86             VC/Auxiliary/Build/vcvarsx86_amd64.bat VC/Auxiliary/Build/vcvars64.bat"
  87       fi
  88 
  89       for VCVARSFILE in $VCVARSFILES; do
  90         if test -f "$VS_BASE/$VCVARSFILE"; then
  91           VS_ENV_CMD="$VS_BASE/$VCVARSFILE"
  92           break
  93         fi
  94       done
  95 
  96       if test "x$VS_ENV_CMD" = x; then
  97         AC_MSG_NOTICE([Warning: None of $VCVARSFILES were found, Visual Studio installation not recognized. Ignoring])
  98       else
  99         # PLATFORM_TOOLSET is used during the compilation of the freetype sources
 100         # (see 'LIB_BUILD_FREETYPE' in libraries.m4) and must be one of 'v100',
 101         # 'v110' or 'v120' for VS 2010, 2012 or VS2013
 102         eval PLATFORM_TOOLSET="\${VS_VS_PLATFORM_NAME_${VS_VERSION}}"
 103       fi
 104     fi
 105   fi
 106 ])
 107 
 108 ################################################################################
 109 
 110 AC_DEFUN([TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT],
 111 [
 112   if test "x$VS_ENV_CMD" = x; then
 113     VS_VERSION="$1"
 114     WIN_SDK_BASE="$2"
 115     METHOD="$3"
 116     UTIL_REWRITE_AS_UNIX_PATH(WIN_SDK_BASE)
 117     if test -d "$WIN_SDK_BASE"; then
 118       # There have been cases of partial or broken SDK installations. A missing
 119       # lib dir is not going to work.
 120       if test ! -d "$WIN_SDK_BASE/lib"; then
 121         AC_MSG_NOTICE([Found Windows SDK installation at $WIN_SDK_BASE using $METHOD])
 122         AC_MSG_NOTICE([Warning: Installation is broken, lib dir is missing. Ignoring])
 123       elif test -f "$WIN_SDK_BASE/Bin/SetEnv.Cmd"; then
 124         AC_MSG_NOTICE([Found Windows SDK installation at $WIN_SDK_BASE using $METHOD])
 125         VS_ENV_CMD="$WIN_SDK_BASE/Bin/SetEnv.Cmd"
 126         if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
 127           VS_ENV_ARGS="/x86"
 128         else
 129           VS_ENV_ARGS="/x64"
 130         fi
 131         # PLATFORM_TOOLSET is used during the compilation of the freetype sources (see
 132         # 'LIB_BUILD_FREETYPE' in libraries.m4) and must be 'Windows7.1SDK' for Windows7.1SDK
 133         # TODO: improve detection for other versions of SDK
 134         eval PLATFORM_TOOLSET="\${VS_SDK_PLATFORM_NAME_${VS_VERSION}}"
 135       else
 136         AC_MSG_NOTICE([Found Windows SDK installation at $WIN_SDK_BASE using $METHOD])
 137         AC_MSG_NOTICE([Warning: Installation is broken, SetEnv.Cmd is missing. Ignoring])
 138       fi
 139     fi
 140   fi
 141 ])
 142 
 143 ################################################################################
 144 # Finds the bat or cmd file in Visual Studio or the SDK that sets up a proper
 145 # build environment and assigns it to VS_ENV_CMD
 146 AC_DEFUN([TOOLCHAIN_FIND_VISUAL_STUDIO_BAT_FILE],
 147 [
 148   # VS2017 provides the option to install previous minor versions of the MSVC
 149   # toolsets. It is not possible to directly download earlier minor versions of
 150   # VS2017 and in order to build with a previous minor compiler toolset version,
 151   # it is now possible to compile with earlier minor versions by passing
 152   # -vcvars_ver=<toolset_version> argument to vcvarsall.bat.
 153   AC_ARG_WITH(msvc-toolset-version, [AS_HELP_STRING([--with-msvc-toolset-version],
 154       [specific MSVC toolset version to use, passed as -vcvars_ver argument to
 155        pass to vcvarsall.bat (Windows only)])])
 156 
 157   VS_VERSION="$1"
 158   eval VS_COMNTOOLS_VAR="\${VS_ENVVAR_${VS_VERSION}}"
 159   eval VS_COMNTOOLS="\$${VS_COMNTOOLS_VAR}"
 160   eval VS_INSTALL_DIR="\${VS_VS_INSTALLDIR_${VS_VERSION}}"
 161   eval VS_EDITIONS="\${VS_EDITIONS_${VS_VERSION}}"
 162   eval SDK_INSTALL_DIR="\${VS_SDK_INSTALLDIR_${VS_VERSION}}"
 163   eval VS_ENV_ARGS="\${VS_ENV_ARGS_${VS_VERSION}}"
 164   eval VS_TOOLSET_SUPPORTED="\${VS_TOOLSET_SUPPORTED_${VS_VERSION}}"
 165 
 166   VS_ENV_CMD=""
 167 
 168   # When using --with-tools-dir, assume it points to the correct and default
 169   # version of Visual Studio or that --with-toolchain-version was also set.
 170   if test "x$with_tools_dir" != x; then
 171     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 172         [$with_tools_dir/../..], [--with-tools-dir])
 173     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 174         [$with_tools_dir/../../..], [--with-tools-dir])
 175     if test "x$VS_ENV_CMD" = x; then
 176       # Having specified an argument which is incorrect will produce an instant failure;
 177       # we should not go on looking
 178       AC_MSG_NOTICE([The path given by --with-tools-dir does not contain a valid])
 179       AC_MSG_NOTICE([Visual Studio installation. Please point to the VC/bin or VC/bin/amd64])
 180       AC_MSG_NOTICE([directory within the Visual Studio installation])
 181       AC_MSG_ERROR([Cannot locate a valid Visual Studio installation])
 182     fi
 183   fi
 184 
 185   if test "x$VS_COMNTOOLS" != x; then
 186     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 187         [$VS_COMNTOOLS/../..], [$VS_COMNTOOLS_VAR variable])
 188   fi
 189   if test "x$PROGRAMFILES" != x; then
 190     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 191         [$PROGRAMFILES/$VS_INSTALL_DIR], [well-known name])
 192   fi
 193   # Work around the insanely named ProgramFiles(x86) env variable
 194   PROGRAMFILES_X86="`env | $SED -n 's/^ProgramFiles(x86)=//p'`"
 195   if test "x$PROGRAMFILES_X86" != x; then
 196     TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 197         [$PROGRAMFILES_X86/$VS_INSTALL_DIR], [well-known name])
 198   fi
 199   TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 200       [C:/Program Files/$VS_INSTALL_DIR], [well-known name])
 201   TOOLCHAIN_CHECK_POSSIBLE_VISUAL_STUDIO_ROOT([${VS_VERSION}],
 202       [C:/Program Files (x86)/$VS_INSTALL_DIR], [well-known name])
 203   if test "x$SDK_INSTALL_DIR" != x; then
 204     if test "x$ProgramW6432" != x; then
 205       TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 206           [$ProgramW6432/$SDK_INSTALL_DIR], [well-known name])
 207     fi
 208     if test "x$PROGRAMW6432" != x; then
 209       TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 210           [$PROGRAMW6432/$SDK_INSTALL_DIR], [well-known name])
 211     fi
 212     if test "x$PROGRAMFILES" != x; then
 213       TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 214           [$PROGRAMFILES/$SDK_INSTALL_DIR], [well-known name])
 215     fi
 216     TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 217         [C:/Program Files/$SDK_INSTALL_DIR], [well-known name])
 218     TOOLCHAIN_CHECK_POSSIBLE_WIN_SDK_ROOT([${VS_VERSION}],
 219         [C:/Program Files (x86)/$SDK_INSTALL_DIR], [well-known name])
 220   fi
 221 
 222   if test "x$VS_TOOLSET_SUPPORTED" != x; then
 223     if test "x$with_msvc_toolset_version" != x; then
 224       VS_ENV_ARGS="$VS_ENV_ARGS -vcvars_ver=$with_msvc_toolset_version"
 225     fi
 226   fi
 227 ])
 228 
 229 ################################################################################
 230 
 231 AC_DEFUN([TOOLCHAIN_FIND_VISUAL_STUDIO],
 232 [
 233   AC_ARG_WITH(toolchain-version, [AS_HELP_STRING([--with-toolchain-version],
 234       [the version of the toolchain to look for, use '--help' to show possible values @<:@platform dependent@:>@])])
 235 
 236   if test "x$with_toolchain_version" = xlist; then
 237     # List all toolchains
 238     AC_MSG_NOTICE([The following toolchain versions are valid on this platform:])
 239     for version in $VALID_VS_VERSIONS; do
 240       eval VS_DESCRIPTION=\${VS_DESCRIPTION_$version}
 241       $PRINTF "  %-10s  %s\n" $version "$VS_DESCRIPTION"
 242     done
 243 
 244     exit 0
 245   elif test "x$DEVKIT_VS_VERSION" != x; then
 246     VS_VERSION=$DEVKIT_VS_VERSION
 247     TOOLCHAIN_VERSION=$VS_VERSION
 248     # If the devkit has a name, use that as description
 249     VS_DESCRIPTION="$DEVKIT_NAME"
 250     if test "x$VS_DESCRIPTION" = x; then
 251       eval VS_DESCRIPTION="\${VS_DESCRIPTION_${VS_VERSION}}"
 252     fi
 253     eval VS_VERSION_INTERNAL="\${VS_VERSION_INTERNAL_${VS_VERSION}}"
 254     eval MSVCR_NAME="\${VS_MSVCR_${VS_VERSION}}"
 255     eval VCRUNTIME_1_NAME="\${VS_VCRUNTIME_1_${VS_VERSION}}"
 256     eval MSVCP_NAME="\${VS_MSVCP_${VS_VERSION}}"
 257     eval USE_UCRT="\${VS_USE_UCRT_${VS_VERSION}}"
 258     eval VS_SUPPORTED="\${VS_SUPPORTED_${VS_VERSION}}"
 259     eval PLATFORM_TOOLSET="\${VS_VS_PLATFORM_NAME_${VS_VERSION}}"
 260 
 261     # The TOOLCHAIN_PATH from a devkit is in Unix format. In WSL we need a
 262     # windows version of the complete VS_PATH as VS_PATH_WINDOWS
 263     if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 264       # Convert the toolchain path
 265       OLDIFS="$IFS"
 266       IFS=":"
 267       VS_PATH_WINDOWS=""
 268       for i in $TOOLCHAIN_PATH; do
 269         path=$i
 270         UTIL_REWRITE_AS_WINDOWS_MIXED_PATH([path])
 271         VS_PATH_WINDOWS="$VS_PATH_WINDOWS;$path"
 272       done
 273       IFS="$OLDIFS"
 274       # Append the current path from Windows env
 275       WINDOWS_PATH="`$CMD /c echo %PATH%`"
 276       VS_PATH_WINDOWS="$VS_PATH_WINDOWS;$WINDOWS_PATH"
 277     else
 278       VS_PATH="$TOOLCHAIN_PATH:$PATH"
 279     fi
 280 
 281     # Convert DEVKIT_VS_INCLUDE into windows style VS_INCLUDE so that it
 282     # can still be exported as INCLUDE for compiler invocations without
 283     # SYSROOT_CFLAGS
 284     OLDIFS="$IFS"
 285     IFS=";"
 286     for i in $DEVKIT_VS_INCLUDE; do
 287       ipath=$i
 288       UTIL_REWRITE_AS_WINDOWS_MIXED_PATH([ipath])
 289       VS_INCLUDE="$VS_INCLUDE;$ipath"
 290     done
 291     # Convert DEVKIT_VS_LIB into VS_LIB so that it can still be exported
 292     # as LIB for compiler invocations without SYSROOT_LDFLAGS
 293     for i in $DEVKIT_VS_LIB; do
 294       libpath=$i
 295       UTIL_REWRITE_AS_WINDOWS_MIXED_PATH([libpath])
 296       VS_LIB="$VS_LIB;$libpath"
 297     done
 298     IFS="$OLDIFS"
 299 
 300     AC_MSG_NOTICE([Found devkit $VS_DESCRIPTION])
 301 
 302   elif test "x$with_toolchain_version" != x; then
 303     # User override; check that it is valid
 304     if test "x${VALID_VS_VERSIONS/$with_toolchain_version/}" = "x${VALID_VS_VERSIONS}"; then
 305       AC_MSG_NOTICE([Visual Studio version $with_toolchain_version is not valid.])
 306       AC_MSG_NOTICE([Valid Visual Studio versions: $VALID_VS_VERSIONS.])
 307       AC_MSG_ERROR([Cannot continue.])
 308     fi
 309     VS_VERSIONS_PROBE_LIST="$with_toolchain_version"
 310   else
 311     # No flag given, use default
 312     VS_VERSIONS_PROBE_LIST="$VALID_VS_VERSIONS"
 313   fi
 314 
 315   for VS_VERSION in $VS_VERSIONS_PROBE_LIST; do
 316     TOOLCHAIN_FIND_VISUAL_STUDIO_BAT_FILE([$VS_VERSION])
 317     if test "x$VS_ENV_CMD" != x; then
 318       TOOLCHAIN_VERSION=$VS_VERSION
 319       eval VS_DESCRIPTION="\${VS_DESCRIPTION_${VS_VERSION}}"
 320       eval VS_VERSION_INTERNAL="\${VS_VERSION_INTERNAL_${VS_VERSION}}"
 321       eval MSVCR_NAME="\${VS_MSVCR_${VS_VERSION}}"
 322       eval VCRUNTIME_1_NAME="\${VS_VCRUNTIME_1_${VS_VERSION}}"
 323       eval MSVCP_NAME="\${VS_MSVCP_${VS_VERSION}}"
 324       eval USE_UCRT="\${VS_USE_UCRT_${VS_VERSION}}"
 325       eval VS_SUPPORTED="\${VS_SUPPORTED_${VS_VERSION}}"
 326       # The rest of the variables are already evaled while probing
 327       AC_MSG_NOTICE([Found $VS_DESCRIPTION])
 328       break
 329     fi
 330   done
 331 
 332   TOOLCHAIN_DESCRIPTION="$VS_DESCRIPTION"
 333   if test "x$VS_SUPPORTED" = "xfalse"; then
 334     UNSUPPORTED_TOOLCHAIN_VERSION=yes
 335   fi
 336 ])
 337 
 338 ################################################################################
 339 # Check if the VS env variables were setup prior to running configure.
 340 # If not, then find vcvarsall.bat and run it automatically, and integrate
 341 # the set env variables into the spec file.
 342 AC_DEFUN([TOOLCHAIN_SETUP_VISUAL_STUDIO_ENV],
 343 [
 344   # Store path to cygwin link.exe to help excluding it when searching for
 345   # VS linker. This must be done before changing the PATH when looking for VS.
 346   AC_PATH_PROG(CYGWIN_LINK, link.exe)
 347   if test "x$CYGWIN_LINK" != x; then
 348     AC_MSG_CHECKING([if the first found link.exe is actually the Cygwin link tool])
 349     "$CYGWIN_LINK" --version > /dev/null
 350     if test $? -eq 0 ; then
 351       AC_MSG_RESULT([yes])
 352     else
 353       AC_MSG_RESULT([no])
 354       # This might be the VS linker. Don't exclude it later on.
 355       CYGWIN_LINK=""
 356     fi
 357   fi
 358 
 359   # First-hand choice is to locate and run the vsvars bat file.
 360   TOOLCHAIN_FIND_VISUAL_STUDIO
 361 
 362   # If we have a devkit, skip all of the below.
 363   if test "x$DEVKIT_VS_VERSION" = x; then
 364     if test "x$VS_ENV_CMD" != x; then
 365       # We have found a Visual Studio environment on disk, let's extract variables from the vsvars bat file.
 366       UTIL_FIXUP_EXECUTABLE(VS_ENV_CMD)
 367 
 368       # Lets extract the variables that are set by vcvarsall.bat/vsvars32.bat/vsvars64.bat
 369       AC_MSG_NOTICE([Trying to extract Visual Studio environment variables])
 370 
 371       # We need to create a couple of temporary files.
 372       VS_ENV_TMP_DIR="$CONFIGURESUPPORT_OUTPUTDIR/vs-env"
 373       $MKDIR -p $VS_ENV_TMP_DIR
 374 
 375       # Cannot use the VS10 setup script directly (since it only updates the DOS subshell environment).
 376       # Instead create a shell script which will set the relevant variables when run.
 377       WINPATH_VS_ENV_CMD="$VS_ENV_CMD"
 378       UTIL_REWRITE_AS_WINDOWS_MIXED_PATH([WINPATH_VS_ENV_CMD])
 379 
 380       if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 381         WINPATH_BASH="bash"
 382       else
 383         WINPATH_BASH="$BASH"
 384         UTIL_REWRITE_AS_WINDOWS_MIXED_PATH([WINPATH_BASH])
 385       fi
 386 
 387       # Generate a DOS batch file which runs $VS_ENV_CMD, and then creates a shell
 388       # script (executable by bash) that will setup the important variables.
 389       EXTRACT_VC_ENV_BAT_FILE="$VS_ENV_TMP_DIR/extract-vs-env.bat"
 390       $ECHO "@echo off" >  $EXTRACT_VC_ENV_BAT_FILE
 391       # This will end up something like:
 392       # call C:/progra~2/micros~2.0/vc/bin/amd64/vcvars64.bat
 393       $ECHO "call \"$WINPATH_VS_ENV_CMD\" $VS_ENV_ARGS" >> $EXTRACT_VC_ENV_BAT_FILE
 394       # In some cases, the VS_ENV_CMD will change directory, change back so
 395       # the set-vs-env.sh ends up in the right place.
 396       $ECHO 'cd %~dp0' >> $EXTRACT_VC_ENV_BAT_FILE
 397       if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 398         # These will end up something like:
 399         # echo VS_PATH=\"$PATH\" > set-vs-env.sh
 400         # The trailing space for everyone except PATH is no typo, but is needed due
 401         # to trailing \ in the Windows paths. These will be stripped later.
 402         # Trying pure CMD extract. This results in windows paths that need to
 403         # be converted post extraction, but a simpler script.
 404         $ECHO 'echo VS_PATH="%PATH%" > set-vs-env.sh' \
 405             >> $EXTRACT_VC_ENV_BAT_FILE
 406         $ECHO 'echo VS_INCLUDE="%INCLUDE% " >> set-vs-env.sh' \
 407             >> $EXTRACT_VC_ENV_BAT_FILE
 408         $ECHO 'echo VS_LIB="%LIB% " >> set-vs-env.sh' \
 409             >> $EXTRACT_VC_ENV_BAT_FILE
 410         $ECHO 'echo VCINSTALLDIR="%VCINSTALLDIR% " >> set-vs-env.sh' \
 411             >> $EXTRACT_VC_ENV_BAT_FILE
 412         $ECHO 'echo VCToolsRedistDir="%VCToolsRedistDir% " >> set-vs-env.sh' \
 413             >> $EXTRACT_VC_ENV_BAT_FILE
 414         $ECHO 'echo WindowsSdkDir="%WindowsSdkDir% " >> set-vs-env.sh' \
 415             >> $EXTRACT_VC_ENV_BAT_FILE
 416         $ECHO 'echo WINDOWSSDKDIR="%WINDOWSSDKDIR% " >> set-vs-env.sh' \
 417             >> $EXTRACT_VC_ENV_BAT_FILE
 418       else
 419         # These will end up something like:
 420         # C:/CygWin/bin/bash -c 'echo VS_PATH=\"$PATH\" > localdevenv.sh
 421         # The trailing space for everyone except PATH is no typo, but is needed due
 422         # to trailing \ in the Windows paths. These will be stripped later.
 423         $ECHO "$WINPATH_BASH -c 'echo VS_PATH="'\"$PATH\" > set-vs-env.sh' \
 424             >> $EXTRACT_VC_ENV_BAT_FILE
 425         $ECHO "$WINPATH_BASH -c 'echo VS_INCLUDE="'\"$INCLUDE\;$include \" >> set-vs-env.sh' \
 426             >> $EXTRACT_VC_ENV_BAT_FILE
 427         $ECHO "$WINPATH_BASH -c 'echo VS_LIB="'\"$LIB\;$lib \" >> set-vs-env.sh' \
 428             >> $EXTRACT_VC_ENV_BAT_FILE
 429         $ECHO "$WINPATH_BASH -c 'echo VCINSTALLDIR="'\"$VCINSTALLDIR \" >> set-vs-env.sh' \
 430             >> $EXTRACT_VC_ENV_BAT_FILE
 431         $ECHO "$WINPATH_BASH -c 'echo VCToolsRedistDir="'\"$VCToolsRedistDir \" >> set-vs-env.sh' \
 432             >> $EXTRACT_VC_ENV_BAT_FILE
 433         $ECHO "$WINPATH_BASH -c 'echo WindowsSdkDir="'\"$WindowsSdkDir \" >> set-vs-env.sh' \
 434             >> $EXTRACT_VC_ENV_BAT_FILE
 435         $ECHO "$WINPATH_BASH -c 'echo WINDOWSSDKDIR="'\"$WINDOWSSDKDIR \" >> set-vs-env.sh' \
 436             >> $EXTRACT_VC_ENV_BAT_FILE
 437       fi
 438 
 439       # Now execute the newly created bat file.
 440       # Change directory so we don't need to mess with Windows paths in redirects.
 441       cd $VS_ENV_TMP_DIR
 442       $CMD /c extract-vs-env.bat > extract-vs-env.log 2>&1
 443       cd $CONFIGURE_START_DIR
 444 
 445       if test ! -s $VS_ENV_TMP_DIR/set-vs-env.sh; then
 446         AC_MSG_NOTICE([Could not succesfully extract the environment variables needed for the VS setup.])
 447         AC_MSG_NOTICE([Try setting --with-tools-dir to the VC/bin directory within the VS installation])
 448         AC_MSG_NOTICE([or run "bash.exe -l" from a VS command prompt and then run configure from there.])
 449         AC_MSG_ERROR([Cannot continue])
 450       fi
 451 
 452       # Remove windows line endings
 453       $SED -i -e 's|\r||g' $VS_ENV_TMP_DIR/set-vs-env.sh
 454 
 455       # Now set all paths and other env variables. This will allow the rest of
 456       # the configure script to find and run the compiler in the proper way.
 457       AC_MSG_NOTICE([Setting extracted environment variables])
 458       . $VS_ENV_TMP_DIR/set-vs-env.sh
 459       # Now we have VS_PATH, VS_INCLUDE, VS_LIB. For further checking, we
 460       # also define VCINSTALLDIR, WindowsSdkDir and WINDOWSSDKDIR.
 461 
 462       # In WSL, the extracted VS_PATH is Windows style. This needs to be
 463       # rewritten as Unix style and the Windows style version is saved
 464       # in VS_PATH_WINDOWS.
 465       if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl"; then
 466         OLDIFS="$IFS"
 467         IFS=";"
 468         # Convert VS_PATH to unix style
 469         VS_PATH_WINDOWS="$VS_PATH"
 470         VS_PATH=""
 471         for i in $VS_PATH_WINDOWS; do
 472           path=$i
 473           # Only process non-empty elements
 474           if test "x$path" != x; then
 475             IFS="$OLDIFS"
 476             # Check that directory exists before calling fixup_path
 477             testpath=$path
 478             UTIL_REWRITE_AS_UNIX_PATH([testpath])
 479             if test -d "$testpath"; then
 480               UTIL_FIXUP_PATH([path])
 481               UTIL_APPEND_TO_PATH(VS_PATH, $path)
 482             fi
 483             IFS=";"
 484           fi
 485         done
 486         IFS="$OLDIFS"
 487       fi
 488 
 489     else
 490       # We did not find a vsvars bat file, let's hope we are run from a VS command prompt.
 491       AC_MSG_NOTICE([Cannot locate a valid Visual Studio installation, checking current environment])
 492     fi
 493   fi
 494 
 495   # At this point, we should have correct variables in the environment, or we can't continue.
 496   AC_MSG_CHECKING([for Visual Studio variables])
 497 
 498   if test "x$VCINSTALLDIR" != x || test "x$WindowsSDKDir" != x \
 499       || test "x$WINDOWSSDKDIR" != x || test "x$DEVKIT_NAME" != x; then
 500     if test "x$VS_INCLUDE" = x || test "x$VS_LIB" = x; then
 501       AC_MSG_RESULT([present but broken])
 502       AC_MSG_ERROR([Your VC command prompt seems broken, INCLUDE and/or LIB is missing.])
 503     else
 504       AC_MSG_RESULT([ok])
 505       # Remove any trailing "\" ";" and " " from the variables.
 506       VS_INCLUDE=`$ECHO "$VS_INCLUDE" | $SED -e 's/\\\\*;* *$//'`
 507       VS_LIB=`$ECHO "$VS_LIB" | $SED 's/\\\\*;* *$//'`
 508       VCINSTALLDIR=`$ECHO "$VCINSTALLDIR" | $SED 's/\\\\* *$//'`
 509       VCToolsRedistDir=`$ECHO "$VCToolsRedistDir" | $SED 's/\\\\* *$//'`
 510       WindowsSdkDir=`$ECHO "$WindowsSdkDir" | $SED 's/\\\\* *$//'`
 511       WINDOWSSDKDIR=`$ECHO "$WINDOWSSDKDIR" | $SED 's/\\\\* *$//'`
 512       if test -z "$WINDOWSSDKDIR"; then
 513         WINDOWSSDKDIR="$WindowsSdkDir"
 514       fi
 515       # Remove any paths containing # (typically F#) as that messes up make. This
 516       # is needed if visual studio was installed with F# support.
 517       VS_PATH=`$ECHO "$VS_PATH" | $SED 's/[[^:#]]*#[^:]*://g'`
 518 
 519       AC_SUBST(VS_PATH)
 520       AC_SUBST(VS_INCLUDE)
 521       AC_SUBST(VS_LIB)
 522 
 523       # Convert VS_INCLUDE into SYSROOT_CFLAGS
 524       OLDIFS="$IFS"
 525       IFS=";"
 526       for i in $VS_INCLUDE; do
 527         ipath=$i
 528         # Only process non-empty elements
 529         if test "x$ipath" != x; then
 530           IFS="$OLDIFS"
 531           # Check that directory exists before calling fixup_path
 532           testpath=$ipath
 533           UTIL_REWRITE_AS_UNIX_PATH([testpath])
 534           if test -d "$testpath"; then
 535             UTIL_FIXUP_PATH([ipath])
 536             SYSROOT_CFLAGS="$SYSROOT_CFLAGS -I$ipath"
 537           fi
 538           IFS=";"
 539         fi
 540       done
 541       # Convert VS_LIB into SYSROOT_LDFLAGS
 542       for i in $VS_LIB; do
 543         libpath=$i
 544         # Only process non-empty elements
 545         if test "x$libpath" != x; then
 546           IFS="$OLDIFS"
 547           # Check that directory exists before calling fixup_path
 548           testpath=$libpath
 549           UTIL_REWRITE_AS_UNIX_PATH([testpath])
 550           if test -d "$testpath"; then
 551             UTIL_FIXUP_PATH([libpath])
 552             SYSROOT_LDFLAGS="$SYSROOT_LDFLAGS -libpath:$libpath"
 553           fi
 554           IFS=";"
 555         fi
 556       done
 557       IFS="$OLDIFS"
 558 
 559       AC_SUBST(VS_PATH_WINDOWS)
 560     fi
 561   else
 562     AC_MSG_RESULT([not found])
 563 
 564     if test "x$VS_ENV_CMD" = x; then
 565       AC_MSG_NOTICE([Cannot locate a valid Visual Studio or Windows SDK installation on disk,])
 566       AC_MSG_NOTICE([nor is this script run from a Visual Studio command prompt.])
 567     else
 568       AC_MSG_NOTICE([Running the extraction script failed.])
 569     fi
 570     AC_MSG_NOTICE([Try setting --with-tools-dir to the VC/bin directory within the VS installation])
 571     AC_MSG_NOTICE([or run "bash.exe -l" from a VS command prompt and then run configure from there.])
 572     AC_MSG_ERROR([Cannot continue])
 573   fi
 574 ])
 575 
 576 AC_DEFUN([TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL],
 577 [
 578   DLL_NAME="$1"
 579   POSSIBLE_MSVC_DLL="$2"
 580   METHOD="$3"
 581   if test -n "$POSSIBLE_MSVC_DLL" -a -e "$POSSIBLE_MSVC_DLL"; then
 582     AC_MSG_NOTICE([Found $DLL_NAME at $POSSIBLE_MSVC_DLL using $METHOD])
 583 
 584     # Need to check if the found msvcr is correct architecture
 585     AC_MSG_CHECKING([found $DLL_NAME architecture])
 586     MSVC_DLL_FILETYPE=`$FILE -b "$POSSIBLE_MSVC_DLL"`
 587     if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.msys"; then
 588       # The MSYS 'file' command returns "PE32 executable for MS Windows (DLL) (GUI) Intel 80386 32-bit"
 589       # on x32 and "PE32+ executable for MS Windows (DLL) (GUI) Mono/.Net assembly" on x64 systems.
 590       if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
 591         CORRECT_MSVCR_ARCH="PE32 executable"
 592       else
 593         CORRECT_MSVCR_ARCH="PE32+ executable"
 594       fi
 595     else
 596       if test "x$OPENJDK_TARGET_CPU_BITS" = x32; then
 597         CORRECT_MSVCR_ARCH=386
 598       else
 599         CORRECT_MSVCR_ARCH=x86-64
 600       fi
 601     fi
 602     if $ECHO "$MSVC_DLL_FILETYPE" | $GREP "$CORRECT_MSVCR_ARCH" 2>&1 > /dev/null; then
 603       AC_MSG_RESULT([ok])
 604       MSVC_DLL="$POSSIBLE_MSVC_DLL"
 605       AC_MSG_CHECKING([for $DLL_NAME])
 606       AC_MSG_RESULT([$MSVC_DLL])
 607     else
 608       AC_MSG_RESULT([incorrect, ignoring])
 609       AC_MSG_NOTICE([The file type of the located $DLL_NAME is $MSVC_DLL_FILETYPE])
 610     fi
 611   fi
 612 ])
 613 
 614 AC_DEFUN([TOOLCHAIN_SETUP_MSVC_DLL],
 615 [
 616   DLL_NAME="$1"
 617   MSVC_DLL=
 618 
 619   if test "x$MSVC_DLL" = x; then
 620     if test "x$VCINSTALLDIR" != x; then
 621       CYGWIN_VC_INSTALL_DIR="$VCINSTALLDIR"
 622       UTIL_FIXUP_PATH(CYGWIN_VC_INSTALL_DIR)
 623       if test "$VS_VERSION" -lt 2017; then
 624         # Probe: Using well-known location from Visual Studio 12.0 and older
 625         if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
 626           POSSIBLE_MSVC_DLL="$CYGWIN_VC_INSTALL_DIR/redist/x64/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME"
 627         else
 628           POSSIBLE_MSVC_DLL="$CYGWIN_VC_INSTALL_DIR/redist/x86/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME"
 629         fi
 630       else
 631         CYGWIN_VC_TOOLS_REDIST_DIR="$VCToolsRedistDir"
 632         UTIL_FIXUP_PATH(CYGWIN_VC_TOOLS_REDIST_DIR)
 633         # Probe: Using well-known location from VS 2017 and VS 2019
 634         if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
 635           POSSIBLE_MSVC_DLL="`ls $CYGWIN_VC_TOOLS_REDIST_DIR/x64/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME`"
 636         else
 637           POSSIBLE_MSVC_DLL="`ls $CYGWIN_VC_TOOLS_REDIST_DIR/x86/Microsoft.VC${VS_VERSION_INTERNAL}.CRT/$DLL_NAME`"
 638         fi
 639       fi
 640       # In case any of the above finds more than one file, loop over them.
 641       for possible_msvc_dll in $POSSIBLE_MSVC_DLL; do
 642         $ECHO "POSSIBLE_MSVC_DLL $possible_msvc_dll"
 643         TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$possible_msvc_dll],
 644             [well-known location in VCINSTALLDIR])
 645       done
 646     fi
 647   fi
 648 
 649   if test "x$MSVC_DLL" = x; then
 650     # Probe: Check in the Boot JDK directory.
 651     POSSIBLE_MSVC_DLL="$BOOT_JDK/bin/$DLL_NAME"
 652     TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$POSSIBLE_MSVC_DLL],
 653         [well-known location in Boot JDK])
 654   fi
 655 
 656   if test "x$MSVC_DLL" = x; then
 657     # Probe: Look in the Windows system32 directory
 658     CYGWIN_SYSTEMROOT="$SYSTEMROOT"
 659     UTIL_REWRITE_AS_UNIX_PATH(CYGWIN_SYSTEMROOT)
 660     POSSIBLE_MSVC_DLL="$CYGWIN_SYSTEMROOT/system32/$DLL_NAME"
 661     TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$POSSIBLE_MSVC_DLL],
 662         [well-known location in SYSTEMROOT])
 663   fi
 664 
 665   if test "x$MSVC_DLL" = x; then
 666     # Probe: If Visual Studio Express is installed, there is usually one with the debugger
 667     if test "x$VS100COMNTOOLS" != x; then
 668       CYGWIN_VS_TOOLS_DIR="$VS100COMNTOOLS/.."
 669       UTIL_REWRITE_AS_UNIX_PATH(CYGWIN_VS_TOOLS_DIR)
 670       if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
 671         POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VS_TOOLS_DIR" -name $DLL_NAME \
 672         | $GREP -i /x64/ | $HEAD --lines 1`
 673       else
 674         POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VS_TOOLS_DIR" -name $DLL_NAME \
 675         | $GREP -i /x86/ | $HEAD --lines 1`
 676       fi
 677       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$POSSIBLE_MSVC_DLL],
 678           [search of VS100COMNTOOLS])
 679     fi
 680   fi
 681 
 682   if test "x$MSVC_DLL" = x; then
 683     # Probe: Search wildly in the VCINSTALLDIR. We've probably lost by now.
 684     # (This was the original behaviour; kept since it might turn something up)
 685     if test "x$CYGWIN_VC_INSTALL_DIR" != x; then
 686       if test "x$OPENJDK_TARGET_CPU_BITS" = x64; then
 687         POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VC_INSTALL_DIR" -name $DLL_NAME \
 688         | $GREP x64 | $HEAD --lines 1`
 689       else
 690         POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VC_INSTALL_DIR" -name $DLL_NAME \
 691         | $GREP x86 | $GREP -v ia64 | $GREP -v x64 | $HEAD --lines 1`
 692         if test "x$POSSIBLE_MSVC_DLL" = x; then
 693           # We're grasping at straws now...
 694           POSSIBLE_MSVC_DLL=`$FIND "$CYGWIN_VC_INSTALL_DIR" -name $DLL_NAME \
 695           | $HEAD --lines 1`
 696         fi
 697       fi
 698 
 699       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL([$DLL_NAME], [$POSSIBLE_MSVC_DLL],
 700           [search of VCINSTALLDIR])
 701     fi
 702   fi
 703 
 704   if test "x$MSVC_DLL" = x; then
 705     AC_MSG_CHECKING([for $DLL_NAME])
 706     AC_MSG_RESULT([no])
 707     AC_MSG_ERROR([Could not find $DLL_NAME. Please specify using --with-msvcr-dll.])
 708   fi
 709 ])
 710 
 711 AC_DEFUN([TOOLCHAIN_SETUP_VS_RUNTIME_DLLS],
 712 [
 713   AC_ARG_WITH(msvcr-dll, [AS_HELP_STRING([--with-msvcr-dll],
 714       [path to microsoft C runtime dll (msvcr*.dll) (Windows only) @<:@probed@:>@])])
 715 
 716   if test "x$with_msvcr_dll" != x; then
 717     # If given explicitly by user, do not probe. If not present, fail directly.
 718     TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($MSVCR_NAME, [$with_msvcr_dll], [--with-msvcr-dll])
 719     if test "x$MSVC_DLL" = x; then
 720       AC_MSG_ERROR([Could not find a proper $MSVCR_NAME as specified by --with-msvcr-dll])
 721     fi
 722     MSVCR_DLL="$MSVC_DLL"
 723   elif test "x$DEVKIT_MSVCR_DLL" != x; then
 724     TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($MSVCR_NAME, [$DEVKIT_MSVCR_DLL], [devkit])
 725     if test "x$MSVC_DLL" = x; then
 726       AC_MSG_ERROR([Could not find a proper $MSVCR_NAME as specified by devkit])
 727     fi
 728     MSVCR_DLL="$MSVC_DLL"
 729   else
 730     TOOLCHAIN_SETUP_MSVC_DLL([${MSVCR_NAME}])
 731     MSVCR_DLL="$MSVC_DLL"
 732   fi
 733   AC_SUBST(MSVCR_DLL)
 734 
 735   AC_ARG_WITH(msvcp-dll, [AS_HELP_STRING([--with-msvcp-dll],
 736       [path to microsoft C++ runtime dll (msvcp*.dll) (Windows only) @<:@probed@:>@])])
 737 
 738   if test "x$MSVCP_NAME" != "x"; then
 739     if test "x$with_msvcp_dll" != x; then
 740       # If given explicitly by user, do not probe. If not present, fail directly.
 741       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($MSVCP_NAME, [$with_msvcp_dll], [--with-msvcp-dll])
 742       if test "x$MSVC_DLL" = x; then
 743         AC_MSG_ERROR([Could not find a proper $MSVCP_NAME as specified by --with-msvcp-dll])
 744       fi
 745       MSVCP_DLL="$MSVC_DLL"
 746     elif test "x$DEVKIT_MSVCP_DLL" != x; then
 747       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($MSVCP_NAME, [$DEVKIT_MSVCP_DLL], [devkit])
 748       if test "x$MSVC_DLL" = x; then
 749         AC_MSG_ERROR([Could not find a proper $MSVCP_NAME as specified by devkit])
 750       fi
 751       MSVCP_DLL="$MSVC_DLL"
 752     else
 753       TOOLCHAIN_SETUP_MSVC_DLL([${MSVCP_NAME}])
 754       MSVCP_DLL="$MSVC_DLL"
 755     fi
 756     AC_SUBST(MSVCP_DLL)
 757   fi
 758 
 759   AC_ARG_WITH(vcruntime-1-dll, [AS_HELP_STRING([--with-vcruntime-1-dll],
 760       [path to microsoft C++ runtime dll (vcruntime*_1.dll) (Windows only) @<:@probed@:>@])])
 761 
 762   if test "x$VCRUNTIME_1_NAME" != "x"; then
 763     if test "x$with_vcruntime_1_dll" != x; then
 764       # If given explicitly by user, do not probe. If not present, fail directly.
 765       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($VCRUNTIME_1_NAME, [$with_vcruntime_1_dll],
 766           [--with-vcruntime-1-dll])
 767       if test "x$MSVC_DLL" = x; then
 768         AC_MSG_ERROR([Could not find a proper $VCRUNTIME_1_NAME as specified by --with-vcruntime-1-dll])
 769       fi
 770       VCRUNTIME_1_DLL="$MSVC_DLL"
 771     elif test "x$DEVKIT_VCRUNTIME_1_DLL" != x; then
 772       TOOLCHAIN_CHECK_POSSIBLE_MSVC_DLL($VCRUNTIME_1_NAME, [$DEVKIT_VCRUNTIME_1_DLL], [devkit])
 773       if test "x$MSVC_DLL" = x; then
 774         AC_MSG_ERROR([Could not find a proper $VCRUNTIME_1_NAME as specified by devkit])
 775       fi
 776       VCRUNTIME_1_DLL="$MSVC_DLL"
 777     else
 778       TOOLCHAIN_SETUP_MSVC_DLL([${VCRUNTIME_1_NAME}])
 779       VCRUNTIME_1_DLL="$MSVC_DLL"
 780     fi
 781     AC_SUBST(VCRUNTIME_1_DLL)
 782   fi
 783 
 784   AC_ARG_WITH(ucrt-dll-dir, [AS_HELP_STRING([--with-ucrt-dll-dir],
 785       [path to Microsoft Windows Kit UCRT DLL dir (Windows only) @<:@probed@:>@])])
 786 
 787   if test "x$USE_UCRT" = "xtrue"; then
 788     AC_MSG_CHECKING([for UCRT DLL dir])
 789     if test "x$with_ucrt_dll_dir" != x; then
 790       if test -z "$(ls -d "$with_ucrt_dll_dir/"*.dll 2> /dev/null)"; then
 791         AC_MSG_RESULT([no])
 792         AC_MSG_ERROR([Could not find any dlls in $with_ucrt_dll_dir])
 793       else
 794         AC_MSG_RESULT([$with_ucrt_dll_dir])
 795         UCRT_DLL_DIR="$with_ucrt_dll_dir"
 796         UTIL_FIXUP_PATH([UCRT_DLL_DIR])
 797       fi
 798     elif test "x$DEVKIT_UCRT_DLL_DIR" != "x"; then
 799       UCRT_DLL_DIR="$DEVKIT_UCRT_DLL_DIR"
 800       AC_MSG_RESULT($UCRT_DLL_DIR)
 801     else
 802       CYGWIN_WINDOWSSDKDIR="${WINDOWSSDKDIR}"
 803       UTIL_FIXUP_PATH([CYGWIN_WINDOWSSDKDIR])
 804       dll_subdir=$OPENJDK_TARGET_CPU
 805       if test "x$dll_subdir" = "xx86_64"; then
 806         dll_subdir="x64"
 807       fi
 808       UCRT_DLL_DIR="$CYGWIN_WINDOWSSDKDIR/Redist/ucrt/DLLs/$dll_subdir"
 809       if test -z "$(ls -d "$UCRT_DLL_DIR/"*.dll 2> /dev/null)"; then
 810         # Try with version subdir
 811         UCRT_DLL_DIR="`ls -d $CYGWIN_WINDOWSSDKDIR/Redist/*/ucrt/DLLs/$dll_subdir \
 812             2> /dev/null | $SORT -d | $HEAD -n1`"
 813         if test -z "$UCRT_DLL_DIR" \
 814             || test -z "$(ls -d "$UCRT_DLL_DIR/"*.dll 2> /dev/null)"; then
 815           AC_MSG_RESULT([no])
 816           AC_MSG_ERROR([Could not find any dlls in $UCRT_DLL_DIR])
 817         else
 818           AC_MSG_RESULT($UCRT_DLL_DIR)
 819         fi
 820       else
 821         AC_MSG_RESULT($UCRT_DLL_DIR)
 822       fi
 823     fi
 824   else
 825     UCRT_DLL_DIR=
 826   fi
 827   AC_SUBST(UCRT_DLL_DIR)
 828 ])