X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=acinclude.m4;h=0af7fd0fc9ec7aaae5ee7dbfcfbf329123e245f7;hb=7507ec485f72c2ec56731ee5c9790a20d6d694fd;hp=cabe7d3a74cafee3f4a175d854c183646372916f;hpb=2158888d8d8f3b4c00dcf979390a19fa7fcf7942;p=sliver-openvswitch.git

diff --git a/acinclude.m4 b/acinclude.m4
index cabe7d3a7..0af7fd0fc 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -20,8 +20,14 @@ dnl Configure linux kernel source tree
 AC_DEFUN([OVS_CHECK_LINUX26], [
   AC_ARG_WITH([l26],
               [AC_HELP_STRING([--with-l26=/path/to/linux-2.6],
-                              [Specify the linux 2.6 kernel sources])],
+                              [Specify the linux 2.6 kernel build directory])],
               [KBUILD26="$withval"], [KBUILD26=])dnl
+  AC_ARG_WITH([l26-source],
+              [AC_HELP_STRING([--with-l26-source=/path/to/linux-2.6-source],
+                              [Specify the linux 2.6 kernel source directory
+			       (usually figured out automatically from build
+			       directory)])],
+              [KSRC26="$withval"], [KSRC26=])dnl
   if test -n "$KBUILD26"; then
     KBUILD26=`eval echo "$KBUILD26"`
     case $KBUILD26 in
@@ -44,18 +50,29 @@ AC_DEFUN([OVS_CHECK_LINUX26], [
     # We want the source headers, but $KBUILD26 gives us the "build" headers.
     # Use heuristics to find the source headers.
     AC_MSG_CHECKING([for Linux 2.6 source directory])
-    KSRC26=$KBUILD26
-    if test ! -e $KSRC26/include/linux/kernel.h; then
-      case `echo "$KBUILD26" | sed 's,/*$,,'` in # (
-        */build)
-          KSRC26=`echo "$KBUILD26" | sed 's,/build/*$,/source,'`
-          ;; # (
-        *)
-          KSRC26=`(cd $KBUILD26 && pwd -P) | sed 's,-[[^-]]*$,-common,'`
-          ;;
+    if test -n "$KSRC26"; then
+      KSRC26=`eval echo "$KSRC26"`
+      case $KSRC26 in
+          /*) ;;
+          *) KSRC26=`pwd`/$KSRC26 ;;
       esac
       if test ! -e $KSRC26/include/linux/kernel.h; then
-        AC_MSG_ERROR([cannot find source directory])
+        AC_MSG_ERROR([$KSRC26 is not a kernel source directory)])
+      fi
+    else
+      KSRC26=$KBUILD26
+      if test ! -e $KSRC26/include/linux/kernel.h; then
+	case `echo "$KBUILD26" | sed 's,/*$,,'` in # (
+	  */build)
+	    KSRC26=`echo "$KBUILD26" | sed 's,/build/*$,/source,'`
+	    ;; # (
+	  *)
+	    KSRC26=`(cd $KBUILD26 && pwd -P) | sed 's,-[[^-]]*$,-common,'`
+	    ;;
+	esac
+      fi
+      if test ! -e $KSRC26/include/linux/kernel.h; then
+        AC_MSG_ERROR([cannot find source directory (please use --with-l26-source)])
       fi
     fi
     AC_MSG_RESULT([$KSRC26])
@@ -80,6 +97,8 @@ AC_DEFUN([OVS_CHECK_LINUX26], [
 	AC_MSG_ERROR([Linux kernel source in $KBUILD26 is not configured])
     fi
     OVS_CHECK_LINUX26_COMPAT
+  elif test -n "$KSRC26"; then
+    AC_MSG_ERROR([--with-l26-source may not be specified without --with-l26])
   fi
   AM_CONDITIONAL(L26_ENABLED, test -n "$KBUILD26")
 ])
@@ -89,21 +108,26 @@ dnl
 dnl Greps FILE for REGEX.  If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
 AC_DEFUN([OVS_GREP_IFELSE], [
   AC_MSG_CHECKING([whether $2 matches in $1])
-  grep '$2' $1 >/dev/null 2>&1
-  status=$?
-  case $status in
-    0) 
-      AC_MSG_RESULT([yes])
-      $3
-      ;;
-    1) 
-      AC_MSG_RESULT([no])
-      $4
-      ;;
-    *) 
-      AC_MSG_ERROR([grep exited with status $status]) 
-      ;;
-  esac
+  if test -f $1; then
+    grep '$2' $1 >/dev/null 2>&1
+    status=$?
+    case $status in
+      0) 
+        AC_MSG_RESULT([yes])
+        $3
+        ;;
+      1) 
+        AC_MSG_RESULT([no])
+        $4
+        ;;
+      *) 
+        AC_MSG_ERROR([grep exited with status $status])
+        ;;
+    esac
+  else
+    AC_MSG_RESULT([file not found])
+    $4
+  fi
 ])
 
 dnl OVS_DEFINE(NAME)
@@ -157,8 +181,8 @@ AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [
   OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], 
                   [skb_copy_from_linear_data_offset],
                   [OVS_DEFINE([HAVE_SKB_COPY_FROM_LINEAR_DATA_OFFSET])])
-  OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_cow],
-                  [OVS_DEFINE([HAVE_SKB_COW])])
+  OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_cow_head],
+                  [OVS_DEFINE([HAVE_SKB_COW_HEAD])])
   OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_transport_header],
                   [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
   OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_warn_if_lro],
@@ -169,6 +193,8 @@ AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [
 
   OVS_GREP_IFELSE([$KSRC26/include/linux/types.h], [bool],
                   [OVS_DEFINE([HAVE_BOOL_TYPE])])
+  OVS_GREP_IFELSE([$KSRC26/include/linux/types.h], [__wsum],
+                  [OVS_DEFINE([HAVE_CSUM_TYPES])])
 
   OVS_GREP_IFELSE([$KSRC26/include/net/checksum.h], [csum_unfold],
                   [OVS_DEFINE([HAVE_CSUM_UNFOLD])])