diff options
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 new file mode 100644 index 000000000..498196b30 --- /dev/null +++ b/acinclude.m4 @@ -0,0 +1,195 @@ +# -*- autoconf -*- + +# Copyright (c) 2008, 2009 Nicira Networks. +# +# Permission to use, copy, modify, and/or distribute this software for any +# purpose with or without fee is hereby granted, provided that the above +# copyright notice and this permission notice appear in all copies. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + +dnl Checks for --disable-userspace. +AC_DEFUN([OVS_CHECK_USERSPACE], + [AC_ARG_ENABLE( + [userspace], + [AC_HELP_STRING([--disable-userspace], + [Disable building userspace components.])], + [case "${enableval}" in + (yes) build_userspace=true ;; + (no) build_userspace=false ;; + (*) AC_MSG_ERROR([bad value ${enableval} for --enable-userspace]) ;; + esac], + [build_userspace=true]) + AM_CONDITIONAL([ENABLE_USERSPACE], [$build_userspace])]) + +dnl OVS_CHECK_LINUX(OPTION, VERSION, VARIABLE, CONDITIONAL) +dnl +dnl Configure linux kernel source tree +AC_DEFUN([OVS_CHECK_LINUX], [ + AC_ARG_WITH([$1], + [AC_HELP_STRING([--with-$1=/path/to/linux-$2], + [Specify the linux $2 kernel sources])], + [path="$withval"], [path=])dnl + if test -n "$path"; then + path=`eval echo "$path"` + + AC_MSG_CHECKING([for $path directory]) + if test -d "$path"; then + AC_MSG_RESULT([yes]) + $3=$path + AC_SUBST($3) + else + AC_MSG_RESULT([no]) + AC_ERROR([source dir $path doesn't exist]) + fi + + AC_MSG_CHECKING([for $path kernel version]) + patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$path/Makefile"` + sublevel=`sed -n 's/^SUBLEVEL = //p' "$path/Makefile"` + AC_MSG_RESULT([2.$patchlevel.$sublevel]) + if test "2.$patchlevel" != '$2'; then + AC_ERROR([Linux kernel source in $path is not version $2]) + fi + if ! test -e "$path"/include/linux/version.h || \ + ! test -e "$path"/include/linux/autoconf.h; then + AC_MSG_ERROR([Linux kernel source in $path is not configured]) + fi + m4_if($2, [2.6], [OVS_CHECK_LINUX26_COMPAT]) + fi + AM_CONDITIONAL($4, test -n "$path") +]) + +dnl OVS_GREP_IFELSE(FILE, REGEX, IF-MATCH, IF-NO-MATCH) +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 +]) + +dnl OVS_DEFINE(NAME) +dnl +dnl Defines NAME to 1 in kcompat.h. +AC_DEFUN([OVS_DEFINE], [ + echo '#define $1 1' >> datapath/linux-2.6/kcompat.h.new +]) + +AC_DEFUN([OVS_CHECK_VETH], [ + AC_MSG_CHECKING([whether to build veth module]) + if test "$sublevel" = 18; then + AC_MSG_RESULT([yes]) + AC_SUBST([BUILD_VETH], 1) + else + AC_MSG_RESULT([no]) + fi +]) + +AC_DEFUN([OVS_CHECK_LOG2_H], [ + AC_MSG_CHECKING([for $KSRC26/include/linux/log2.h]) + if test -e $KSRC26/include/linux/log2.h; then + AC_MSG_RESULT([yes]) + OVS_DEFINE([HAVE_LOG2_H]) + else + AC_MSG_RESULT([no]) + fi +]) + +dnl OVS_CHECK_LINUX26_COMPAT +dnl +dnl Runs various Autoconf checks on the Linux 2.6 kernel source in +dnl the directory in $KSRC26. +AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [ + rm -f datapath/linux-2.6/kcompat.h.new + mkdir -p datapath/linux-2.6 + : > datapath/linux-2.6/kcompat.h.new + OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_transport_header], + [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])]) + OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [raw], + [OVS_DEFINE([HAVE_MAC_RAW])]) + OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], + [skb_copy_from_linear_data_offset], + [OVS_DEFINE([HAVE_SKB_COPY_FROM_LINEAR_DATA_OFFSET])]) + OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [NLA_NUL_STRING], + [OVS_DEFINE([HAVE_NLA_NUL_STRING])]) + OVS_GREP_IFELSE([$KSRC26/include/linux/err.h], [ERR_CAST], + [OVS_DEFINE([HAVE_ERR_CAST])]) + OVS_CHECK_LOG2_H + OVS_CHECK_VETH + 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 + else + mv datapath/linux-2.6/kcompat.h.new datapath/linux-2.6/kcompat.h + fi +]) + +dnl Checks for net/if_packet.h. +AC_DEFUN([OVS_CHECK_IF_PACKET], + [AC_CHECK_HEADER([net/if_packet.h], + [HAVE_IF_PACKET=yes], + [HAVE_IF_PACKET=no]) + AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes]) + if test "$HAVE_IF_PACKET" = yes; then + AC_DEFINE([HAVE_IF_PACKET], [1], + [Define to 1 if net/if_packet.h is available.]) + fi]) + +dnl Checks for dpkg-buildpackage. If this is available then we check +dnl that the Debian packaging is functional at "make distcheck" time. +AC_DEFUN([OVS_CHECK_DPKG_BUILDPACKAGE], + [AC_CHECK_PROG([HAVE_DPKG_BUILDPACKAGE], [dpkg-buildpackage], [yes], [no]) + AM_CONDITIONAL([HAVE_DPKG_BUILDPACKAGE], + [test $HAVE_DPKG_BUILDPACKAGE = yes])]) + +dnl ---------------------------------------------------------------------- +dnl These macros are from GNU PSPP, with the following original license: +dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED]) +dnl Check whether the given C compiler OPTION is accepted. +dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED. +AC_DEFUN([OVS_CHECK_CC_OPTION], +[ + m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-], [_])])dnl + AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name], + [ovs_save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $1" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no]) + CFLAGS="$ovs_save_CFLAGS"]) + if test $ovs_cv_name = yes; then + m4_if([$2], [], [;], [$2]) + else + m4_if([$3], [], [:], [$3]) + fi +]) + +dnl OVS_ENABLE_OPTION([OPTION]) +dnl Check whether the given C compiler OPTION is accepted. +dnl If so, add it to CFLAGS. +dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement]) +AC_DEFUN([OVS_ENABLE_OPTION], + [OVS_CHECK_CC_OPTION([$1], [CFLAGS="$CFLAGS $1"])]) +dnl ---------------------------------------------------------------------- |