replace AC_DOSFILE with gnulib modules

* bootstrap.conf: Add binary-io, dirname.
* configure.ac: Remove check for setmode, AC_DOSFILE.
* m4/dosfile.m4: Remove.
* src/grep.c: Adjust for dirname.h.
* src/system.h: Adjust for new gnulib modules.

2 files changed, 6 insertions, 21 deletions

diff --git a/m4/.gitignore b/m4/.gitignore
index 5e5d4af6..1bbe3ae3 100644
--- a/m4/.gitignore
+++ b/m4/.gitignore
@@ -4,6 +4,9 @@ atexit.m4
 btowc.m4
 codeset.m4
 dirent_h.m4
+dirname.m4
+dos.m4
+double-slash-root.m4
 errno_h.m4
 error.m4
 exitfail.m4
@@ -70,6 +73,8 @@ stdlib_h.m4
 stpcpy.m4
 strerror.m4
 string_h.m4
+strndup.m4
+strnlen.m4
 strtoimax.m4
 strtol.m4
 strtoll.m4
@@ -88,4 +93,5 @@ wctype.m4
 wint_t.m4
 xalloc.m4
 xsize.m4
+xstrndup.m4
 xstrtol.m4
diff --git a/m4/dosfile.m4 b/m4/dosfile.m4
deleted file mode 100644
index c9c51029..00000000
--- a/m4/dosfile.m4
+++ /dev/null
@@ -1,21 +0,0 @@
-# Check to see if we use dir\file name conventtion
-# If so, set macro HAVE_DOS_FILE_NAMES
-# Also set the macro HAVE_DOS_FILE_CONTENTS for now,
-# since don't know of a good way to independently check this.
-dnl AC_DOSFILE()
-AC_DEFUN([AC_DOSFILE],
-[
-  AC_CACHE_CHECK([for dos file convention], ac_cv_dosfile,
-    [if test -d ".\."; then
-       ac_cv_dosfile=yes
-    else
-       ac_cv_dosfile=no
-    fi
-    ])
-
-  if test $ac_cv_dosfile = yes; then
-    AC_DEFINE(HAVE_DOS_FILE_NAMES, 1, [Define if your OS uses backslashes as directory separators])
-    AC_DEFINE(HAVE_DOS_FILE_CONTENTS, 1,
-      [Define if text file lines end in CRLF.])
-  fi
-])