X-Git-Url: https://git.cworth.org/git?p=tar;a=blobdiff_plain;f=m4%2Fmkfifoat.m4;fp=m4%2Fmkfifoat.m4;h=0b373bbca3ba658e9b0cb0632ec465e09c313b68;hp=0000000000000000000000000000000000000000;hb=de7372b23c3da92fbfaea2d1ac592f0b2ba87914;hpb=fbbfb9406a82e647ce27b6462b11a802fa48f31a

diff --git a/m4/mkfifoat.m4 b/m4/mkfifoat.m4
new file mode 100644
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--- /dev/null
+++ b/m4/mkfifoat.m4
@@ -0,0 +1,24 @@
+# serial 2
+# See if we need to provide mkfifoat/mknodat replacement.
+
+dnl Copyright (C) 2009-2010 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Written by Eric Blake.
+
+AC_DEFUN([gl_FUNC_MKFIFOAT],
+[
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_OPENAT])
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_CHECK_FUNCS_ONCE([mkfifoat mknodat])
+  if test $ac_cv_func_mkfifoat = no; then
+    # No known system has mkfifoat but not mknodat
+    HAVE_MKFIFOAT=0
+    HAVE_MKNODAT=0
+    AC_LIBOBJ([mkfifoat])
+    AC_LIBOBJ([mknodat])
+  fi
+])