automake: Rename INCLUDES to AM_CPPFLAGS (new name)

[urcu.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 774094e0ba4b935f5f2b59a3dfb432434b62633a..079c145eb9677613f21b6e166efbc8b6ded86510 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -140,7 +140,10 @@ AS_IF([test "x$ARCHTYPE" = "xx86"],[
        #For now, using lock; addl compatibility mode even for i686, because the
        #Pentium III is seen as a i686, but lacks mfence instruction.
        #Only using fence for x86_64.
-       AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"],[
+       #
+       #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
+       #variant but lacks fence instructions.
+       AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om"],[
                AC_MSG_RESULT([yes])
                AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
        ],[