X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=configure.ac;fp=configure.ac;h=01285c3996fcfd659110bda61a135569af32fb95;hb=5f6430e49fe572cae4897f53275d52d2df4da58d;hp=58f96cb8714f7a829246eb80e57df772cf91e9a3;hpb=d4fe83d3165d27e101448bfaa8261e0c4bb72385;p=vbig.git

diff --git a/configure.ac b/configure.ac
index 58f96cb..01285c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,6 +5,16 @@ AM_INIT_AUTOMAKE([1.10])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES])
 AC_CONFIG_SRCDIR([vbig.cc])
 AM_CONFIG_HEADER([config.h])
+AC_CANONICAL_HOST
+case "$host" in
+*-*-darwin* )
+  AC_DEFINE([PURGE_COMMAND],["purge"], [Command to purge filesystem cache])
+  ;;
+*-*-linux* )
+  AC_DEFINE([DROP_CACHE_FILE],["/proc/sys/vm/drop_caches"],
+	    [Path to filesystem cache purge interface])
+  ;;
+esac
 AC_LANG([C++])
 AC_PROG_CXX
 AC_PROG_RANLIB