X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=configure.ac;h=516707e345835628476a9155762102d24afd08ce;hb=47fa927b5b6eda596232bda869da018a68cf2198;hp=06d7ba79bd73d1697e9449e452ca175e35fd6721;hpb=4339340186609714392f046392c94aac8aea3bbb;p=rrdtool.git

diff --git a/configure.ac b/configure.ac
index 06d7ba7..516707e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,6 +41,7 @@ AH_TOP([
 
 /* realloc does not support NULL as argument */
 #undef NO_NULL_REALLOC
+
  ])
 
 AH_BOTTOM([
@@ -169,6 +170,16 @@ dnl of the form HAVE_FUNCTION
 
 AC_CHECK_FUNCS(tzset opendir readdir chdir chroot getuid setlocale strerror strerror_r snprintf vsnprintf fpclass class fp_class isnan memmove strchr mktime getrusage gettimeofday)
 
+dnl Use mmap in rrd_update instead of seek+write
+AC_ARG_ENABLE([mmap],
+[  --disable-mmap          disable mmap in rrd_update, use seek+write instead],
+[],
+[enable_mmap=yes])
+
+if test "x$enable_mmap" = xyes; then
+  AC_FUNC_MMAP
+fi
+
 dnl HP-UX 11.00 does not have finite but does have isfinite as a macro so we need
 dnl actual code to check if this works
 AC_CHECK_FUNCS(fpclassify, ,
@@ -323,6 +334,7 @@ AC_SUBST(PERL)
 AC_SUBST(COMP_PERL)
 AC_SUBST(PERL_VERSION)
 
+
 dnl Check for Tcl.
 withval=""
 AC_ARG_WITH(tcllib,[  --with-tcllib=DIR       location of the tclConfig.sh])