In our configure code for rewriting cygwin paths reliably, we use this
construct to find the root of the cygwin installation:
# 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 ".*"`
This used to work fine for a long time, but with the latest version of
cygwin grep, it no longer removes \r from the string. A more robust
implementation would be to instead use tr to explicitly remove both \r
and \n.
Bug: https://bugs.openjdk.java.net/browse/JDK-8176033
Patch:
diff -r fe8466adaef8 common/autoconf/basics_windows.m4
--- a/common/autoconf/basics_windows.m4 Fri Feb 24 12:01:32 2017 +0100
+++ b/common/autoconf/basics_windows.m4 Wed Mar 01 10:50:44 2017 +0100
@@ -329,8 +329,8 @@
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 ".*"`
+ # The cmd output ends with Windows line endings (CR/LF)
+ cygwin_winpath_root=`cd / ; cmd /c cd | $TR -d '\r\n'`
# Force cygpath to report the proper root by including a trailing
space, and then stripping it off again.
CYGWIN_ROOT_PATH=`$CYGPATH -u "$cygwin_winpath_root " | $CUT -f 1
-d " "`
AC_MSG_RESULT([$CYGWIN_ROOT_PATH])
/Erik
