linux/Makefile.main.in, acinclude: preparation for linux 3.7.0+

[sliver-openvswitch.git] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
index 8bd4544..02dc952 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -144,7 +144,8 @@ AC_DEFUN([OVS_CHECK_LINUX], [
          AC_ERROR([Linux kernel in build tree $KBUILD (source tree $KSRC) is version $kversion, but version 2.6 or later is required])
        fi
     fi
-    if test ! -e "$KBUILD"/include/linux/version.h || \
+    if (test ! -e "$KBUILD"/include/linux/version.h && \
+        test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
        (test ! -e "$KBUILD"/include/linux/autoconf.h && \
         test ! -e "$KBUILD"/include/generated/autoconf.h); then
        AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
@@ -288,7 +289,7 @@ AC_DEFUN([OVS_CHECK_IF_PACKET],
                 [Define to 1 if net/if_packet.h is available.])
    fi])
 
-dnl Checks for net/if_dl.h
+dnl Checks for net/if_dl.h.
 AC_DEFUN([OVS_CHECK_IF_DL],
   [AC_CHECK_HEADER([net/if_dl.h],
                    [HAVE_IF_DL=yes],
@@ -427,6 +428,27 @@ EOF
         ovs_cv_gnu_make_if=no
       fi])])
 
+dnl OVS_CHECK_GNU_MAKE
+dnl
+dnl Checks whether make is GNU make (because Linux kernel Makefiles
+dnl only work with GNU make).
+AC_DEFUN([OVS_CHECK_GNU_MAKE],
+  [AC_CACHE_CHECK(
+     [whether ${MAKE-make} is GNU make],
+     [ovs_cv_gnu_make],
+     [rm -f conftest.out
+      AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
+      ${MAKE-make} --version >conftest.out 2>&1
+      cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
+      result=`cat conftest.out`
+      rm -f conftest.mk conftest.out
+
+      case $result in # (
+        GNU*) ovs_cv_gnu_make=yes ;; # (
+        *) ovs_cv_gnu_make=no ;;
+      esac])
+   AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
+
 dnl OVS_CHECK_SPARSE_TARGET
 dnl
 dnl The "cgcc" script from "sparse" isn't very good at detecting the