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  • Committer: James Page
  • Date: 2013-08-21 10:16:57 UTC
  • mfrom: (1.1.20)
  • Revision ID: james.page@canonical.com-20130821101657-3o0z0qeiv5zkwlzi
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acinclude.m4
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# -*- autoconf -*-
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# Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
 
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# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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  OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
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  OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
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  OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
 
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  OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
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  OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
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  OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
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  OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
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  OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
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  OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
 
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  OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
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  OVS_GREP_IFELSE([$KSRC/include/linux/string.h], [kmemdup], [],
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                  [OVS_GREP_IFELSE([$KSRC/include/linux/slab.h], [kmemdup])])
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  OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
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                  [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
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  OVS_GREP_IFELSE([$KSRC/include/linux/percpu.h], [this_cpu_ptr])
 
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  OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
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                  [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
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   fi])
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dnl Checks for net/if_dl.h.
 
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dnl
 
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dnl (We use this as a proxy for checking whether we're building on FreeBSD
 
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dnl or NetBSD.)
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AC_DEFUN([OVS_CHECK_IF_DL],
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  [AC_CHECK_HEADER([net/if_dl.h],
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                   [HAVE_IF_DL=yes],
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   if test "$HAVE_IF_DL" = yes; then
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      AC_DEFINE([HAVE_IF_DL], [1],
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                [Define to 1 if net/if_dl.h is available.])
 
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      # On these platforms we use libpcap to access network devices.
 
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      AC_SEARCH_LIBS([pcap_open_live], [pcap])
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   fi])
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dnl Checks for buggy strtok_r.
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
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dnl Check whether the given C compiler OPTION is accepted.
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dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
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AC_DEFUN([OVS_CHECK_CC_OPTION],
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[
 
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AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
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  m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-], [_])])dnl
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  AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name], 
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    [ovs_save_CFLAGS="$CFLAGS"
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     CFLAGS="$CFLAGS $1"
 
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     dnl Include -Werror in the compiler options, because without -Werror
 
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     dnl clang's GCC-compatible compiler driver does not return a failure
 
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     dnl exit status even though it complains about options it does not
 
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     dnl understand.
 
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     CFLAGS="$CFLAGS $WERROR $1"
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     AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no])
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     CFLAGS="$ovs_save_CFLAGS"])
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  if test $ovs_cv_name = yes; then
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  fi
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])
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dnl OVS_CHECK_WERROR
 
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dnl
 
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dnl Check whether the C compiler accepts -Werror.
 
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dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
 
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AC_DEFUN([OVS_CHECK_WERROR],
 
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  [WERROR=
 
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   _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
 
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dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
 
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dnl Check whether the given C compiler OPTION is accepted.
 
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dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
 
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AC_DEFUN([OVS_CHECK_CC_OPTION],
 
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  [AC_REQUIRE([OVS_CHECK_WERROR])
 
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   _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
 
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dnl OVS_ENABLE_OPTION([OPTION])
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dnl Check whether the given C compiler OPTION is accepted.
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dnl If so, add it to WARNING_FLAGS.
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   AC_SUBST([SPARSEFLAGS])
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   AC_SUBST([CGCCFLAGS])])
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dnl OVS_SPARSE_EXTRA_INCLUDES
 
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dnl
 
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dnl The cgcc script from "sparse" does not search gcc's default
 
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dnl search path. Get the default search path from GCC and pass
 
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dnl them to sparse.
 
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AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
 
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    AC_SUBST([SPARSE_EXTRA_INCLUDES],
 
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           [`$CC -v -E - </dev/null 2>&1 >/dev/null | sed -n -e '/^#include.*search.*starts.*here:/,/^End.*of.*search.*list\./s/^ \(.*\)/-I \1/p' |grep -v /usr/lib | grep -x -v '\-I /usr/include' | tr \\\n ' ' `] ))
 
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dnl OVS_ENABLE_SPARSE
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AC_DEFUN([OVS_ENABLE_SPARSE],
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  [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
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   AC_REQUIRE([OVS_CHECK_MAKE_IF])
 
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   AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
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   : ${SPARSE=sparse}
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   AC_SUBST([SPARSE])
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   AC_CONFIG_COMMANDS_PRE(
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     [if test $ovs_cv_gnu_make_if = yes; then
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        CC='$(if $(C),REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS)" cgcc $(CGCCFLAGS),'"$CC"')'
 
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        CC='$(if $(C),REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
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      fi])])