X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=config%2Facx.m4;h=d186a4ccccd58d1583416c8d0a5bac9b27ca1dd4;hb=e33b51a675a59f37ed6aa8c60b3b202fb470d4ca;hp=c8a32c9f9ed591609a793f5f27310f0fbc6e7149;hpb=fc5df3ab38705a40c2e790e6538b4e9c48bc17bb;p=deliverable%2Fbinutils-gdb.git

diff --git a/config/acx.m4 b/config/acx.m4
index c8a32c9f9e..d186a4cccc 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
+])