# -*- autoconf -*-
-# Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+# Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
elif test X"$with_l26_source" != X; then
KSRC=$with_l26_source
AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
+ else
+ KSRC=
fi
elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
*) KSRC=`pwd`/$KSRC ;;
esac
if test ! -e $KSRC/include/linux/kernel.h; then
- AC_MSG_ERROR([$KSRC is not a kernel source directory)])
+ AC_MSG_ERROR([$KSRC is not a kernel source directory])
fi
else
KSRC=$KBUILD
if test ! -e $KSRC/include/linux/kernel.h; then
- case `echo "$KBUILD" | sed 's,/*$,,'` in # (
- */build)
- KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
- ;; # (
- *)
- KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
- ;;
- esac
+ # Debian kernel build Makefiles tend to include a line of the form:
+ # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
+ # First try to extract the source directory from this line.
+ KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
+ if test ! -e "$KSRC"/include/linux/kernel.h; then
+ # Didn't work. Fall back to name-based heuristics that used to work.
+ case `echo "$KBUILD" | sed 's,/*$,,'` in # (
+ */build)
+ KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
+ ;; # (
+ *)
+ KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
+ ;;
+ esac
+ fi
fi
- if test ! -e $KSRC/include/linux/kernel.h; then
+ if test ! -e "$KSRC"/include/linux/kernel.h; then
AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
fi
fi
dnl
dnl Defines NAME to 1 in kcompat.h.
AC_DEFUN([OVS_DEFINE], [
- echo '#define $1 1' >> datapath/linux-2.6/kcompat.h.new
+ echo '#define $1 1' >> datapath/linux/kcompat.h.new
])
AC_DEFUN([OVS_CHECK_LOG2_H], [
dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
dnl the directory in $KBUILD.
AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
- rm -f datapath/linux-2.6/kcompat.h.new
- mkdir -p datapath/linux-2.6
- : > datapath/linux-2.6/kcompat.h.new
+ rm -f datapath/linux/kcompat.h.new
+ mkdir -p datapath/linux
+ : > datapath/linux/kcompat.h.new
OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
[OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
[OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[skb_copy_from_linear_data_offset])
+ OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
+ [skb_reset_tail_pointer])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
[OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
[OVS_DEFINE([HAVE_SKB_WARN_LRO])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
+ OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
OVS_GREP_IFELSE([$KSRC/include/linux/string.h], [kmemdup], [],
[OVS_GREP_IFELSE([$KSRC/include/linux/slab.h], [kmemdup])])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
- OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
-
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
[OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
OVS_CHECK_LOG2_H
- if cmp -s datapath/linux-2.6/kcompat.h.new \
- datapath/linux-2.6/kcompat.h >/dev/null 2>&1; then
- rm datapath/linux-2.6/kcompat.h.new
+ if cmp -s datapath/linux/kcompat.h.new \
+ datapath/linux/kcompat.h >/dev/null 2>&1; then
+ rm datapath/linux/kcompat.h.new
else
- mv datapath/linux-2.6/kcompat.h.new datapath/linux-2.6/kcompat.h
+ mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
fi
])
[Define to 1 if net/if_packet.h is available.])
fi])
+dnl Checks for net/if_dl.h.
+AC_DEFUN([OVS_CHECK_IF_DL],
+ [AC_CHECK_HEADER([net/if_dl.h],
+ [HAVE_IF_DL=yes],
+ [HAVE_IF_DL=no])
+ AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
+ if test "$HAVE_IF_DL" = yes; then
+ AC_DEFINE([HAVE_IF_DL], [1],
+ [Define to 1 if net/if_dl.h is available.])
+ fi])
+
dnl Checks for buggy strtok_r.
dnl
dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
dnl
dnl Checks whether make has the GNU make $(if condition,then,else) extension.
dnl Runs 'if-true' if so, 'if-false' otherwise.
-AC_DEFUN([OVS_MAKE_HAS_IF],
+AC_DEFUN([OVS_CHECK_MAKE_IF],
[AC_CACHE_CHECK(
[whether ${MAKE-make} has GNU make \$(if) extension],
[ovs_cv_gnu_make_if],
ovs_cv_gnu_make_if=yes
else
ovs_cv_gnu_make_if=no
- fi])
- AS_IF([test $ovs_cv_gnu_make_if = yes], [$1], [$2])])
+ 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 $ovs_cv_gnu_make = yes])])
+
+dnl OVS_CHECK_SPARSE_TARGET
+dnl
+dnl The "cgcc" script from "sparse" isn't very good at detecting the
+dnl target for which the code is being built. This helps it out.
+AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
+ [AC_CACHE_CHECK(
+ [target hint for cgcc],
+ [ac_cv_sparse_target],
+ [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
+ [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
+ [x86_64-*], [ac_cv_sparse_target=x86_64],
+ [ac_cv_sparse_target=other])])
+ AS_CASE([$ac_cv_sparse_target],
+ [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
+ [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
+ [SPARSEFLAGS= CGCCFLAGS=])
+ AC_SUBST([SPARSEFLAGS])
+ AC_SUBST([CGCCFLAGS])])
dnl OVS_ENABLE_SPARSE
AC_DEFUN([OVS_ENABLE_SPARSE],
- [OVS_MAKE_HAS_IF(
- [AC_CONFIG_COMMANDS_PRE(
- [: ${SPARSE=sparse}
- AC_SUBST([SPARSE])
- CC='$(if $(C),REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse" cgcc,'"$CC"')'])])])
+ [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
+ AC_REQUIRE([OVS_CHECK_MAKE_IF])
+ : ${SPARSE=sparse}
+ AC_SUBST([SPARSE])
+ AC_CONFIG_COMMANDS_PRE(
+ [if test $ovs_cv_gnu_make_if = yes; then
+ CC='$(if $(C),REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS)" cgcc $(CGCCFLAGS),'"$CC"')'
+ fi])])