PR binutils/4334

        * acx.m4 (ACX_CHECK_CYGWIN_CAT_WORKS): New macro to check that
        cygwin builds are not running in textmode.

        * configure.ac: Run ACX_CHECK_CYGWIN_CAT_WORKS for cygwin hosted
        builds.
        * configure: Regenerate.

5 files changed, 63 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index e0a3f19e1..b95ea56fd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2008-04-04  Nick Clifton  <nickc@redhat.com>
+
+	PR binutils/4334
+	* configure.ac: Run ACX_CHECK_CYGWIN_CAT_WORKS for cygwin hosted
+	builds.
+	* configure: Regenerate.
+
 2008-04-04  NightStrike  <NightStrike@gmail.com>
 
 	PR other/35151
diff --git a/config/ChangeLog b/config/ChangeLog
index 9152d8acd..3556e08b5 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,9 @@
+2008-04-04  Nick Clifton  <nickc@redhat.com>
+
+	PR binutils/4334
+	* acx.m4 (ACX_CHECK_CYGWIN_CAT_WORKS): New macro to check that
+	cygwin builds are not running in textmode.
+
 2008-03-27  Paolo Bonzini  <bonzini@gnu.org>
 
 	* extensions.m4: New.
diff --git a/config/acx.m4 b/config/acx.m4
index c8a32c9f9..d186a4ccc 100644
--- a/config/acx.m4
+++ b/config/acx.m4
@@ -595,3 +595,26 @@ AC_DEFUN([ACX_BUGURL],[
   AC_SUBST(REPORT_BUGS_TO)
   AC_SUBST(REPORT_BUGS_TEXI)
 ])
+
+dnl ####
+dnl # ACX_CHECK_CYGWIN_CAT_WORKS
+dnl # On Cygwin hosts, check that the cat command ignores 
+dnl # carriage returns as otherwise builds will not work.
+dnl # See binutils PR 4334 for more details.
+AC_DEFUN([ACX_CHECK_CYGWIN_CAT_WORKS],[
+AC_MSG_CHECKING([to see if cat works as expected])
+echo a >cygwin-cat-check
+if test `cat cygwin-cat-check` == a ; then
+  rm cygwin-cat-check
+  AC_MSG_RESULT(yes)
+else
+  rm cygwin-cat-check
+  AC_MSG_RESULT(no)
+  AC_MSG_ERROR([The cat command does not ignore carriage return characters.
+  Please either mount the build directory in binary mode or run the following
+  commands before running any configure script:
+set -o igncr
+export SHELLOPTS 
+  ])
+fi
+])
diff --git a/configure b/configure
index 0fc08b58e..a86371a95 100755
--- a/configure
+++ b/configure
@@ -2780,6 +2780,32 @@ case "${host}" in
     host_makefile_frag="config/mh-djgpp"
     ;;
   *-cygwin*)
+
+echo "$as_me:$LINENO: checking to see if cat works as expected" >&5
+echo $ECHO_N "checking to see if cat works as expected... $ECHO_C" >&6
+echo a >cygwin-cat-check
+if test `cat cygwin-cat-check` == a ; then
+  echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+  { { echo "$as_me:$LINENO: error: The cat command does not ignore carriage return characters.
+  Please either mount the build directory in binary mode or run the following
+  commands before running any configure script:
+set -o igncr
+export SHELLOPTS
+  " >&5
+echo "$as_me: error: The cat command does not ignore carriage return characters.
+  Please either mount the build directory in binary mode or run the following
+  commands before running any configure script:
+set -o igncr
+export SHELLOPTS
+  " >&2;}
+   { (exit 1); exit 1; }; }
+fi
+rm cygwin-cat-check
+
     host_makefile_frag="config/mh-cygwin"
     ;;
   *-mingw*)
diff --git a/configure.ac b/configure.ac
index b7be3ad4c..1a18c61ec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1042,6 +1042,7 @@ case "${host}" in
     host_makefile_frag="config/mh-djgpp"
     ;;
   *-cygwin*)
+    ACX_CHECK_CYGWIN_CAT_WORKS
     host_makefile_frag="config/mh-cygwin"
     ;;
   *-mingw*)