X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=configure.ac;h=ba0853710ee04f15f763ac1c391bb0b91036ca68;hb=2593a69e9485cf67c9654a2667f85971275004fe;hp=32daec3d187ae5a08e43a4ce50430b2ba8998fec;hpb=51d0e04444ef73e323a1a5132752cec9b12ca7fd;p=rrdtool.git

diff --git a/configure.ac b/configure.ac
index 32daec3..ba08537 100644
--- a/configure.ac
+++ b/configure.ac
@@ -437,12 +437,11 @@ dnl enable_mmap="no"
   fi
 fi
 
-dnl use FD based I/O ?
-if test "x$enable_mmap" = "xno";then
-    AC_CHECK_DECLS(posix_fadvise, [], [], [#define _XOPEN_SOURCE 600
+dnl can we use posix_fadvise
+AC_CHECK_DECLS(posix_fadvise, [], [], [#define _XOPEN_SOURCE 600
 #include <fcntl.h>])
-    AC_CHECK_FUNCS(posix_fadvise)
-fi
+AC_CHECK_FUNCS(posix_fadvise)
+
 
 
 CONFIGURE_PART(IEEE Math Checks)