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dnl -*- shell-script -*-
dnl
dnl Copyright (c) 2010-2012 Cisco Systems, Inc. All rights reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl
# There will only be one component used in this framework, and it will
# be selected at configure time by priority. Components must set
# their priorities in their configure.m4 files. They must also set
# the shell variable $opal_hwloc_<component>_include to a header file
# name (relative to the top OMPI source directory) that will be
# included in opal/mca/hwloc/hwloc.h.
# Optionally, components may also set the following shell variables:
#
# opal_hwloc_<component>_ADD_CPPFLAGS
# opal_hwloc_<component>_ADD_LDFLAGS
# opal_hwloc_<component>_ADD_LIBS
# opal_hwloc_<component>_ADD_WRAPPER_EXTRA_CPPFLAGS
# opal_hwloc_<component>_ADD_WRAPPER_EXTRA_LDFLAGS
# opal_hwloc_<component>_ADD_WRAPPER_EXTRA_LIBS
#
# The first 3 will be added to the over all CPPFLAGS/LDFLAGS/LIBS if
# that component is chosen as the winning component. Similarly, the
# latter 3 will be added to WRAPPER_EXTRA_* if that component wins.
dnl We only want one winning component.
m4_define(MCA_hwloc_CONFIGURE_MODE, STOP_AT_FIRST_PRIORITY)
# Other components may depend on at least 1 hwloc component being
# available. As such, we may need to artificially force this
# framework to be configured first. Hence, we move the entirety of
# the hwloc framework's m4 to a separate macro and AC REQUIRE it.
# Other components can do this as well. This will guarantee that
# OPAL_HAVE_HWLOC is set to 0 or 1 *before* some component needs to
# check it.
AC_DEFUN([MCA_hwloc_CONFIG],[
# Use a crude shell variable to know whether this component is
# being required "early". See below.
opal_hwloc_its_time_to_configure=1
AC_REQUIRE([MCA_hwloc_CONFIG_REQUIRE])
])
# See comments above for why this is a separate macro.
AC_DEFUN([MCA_hwloc_CONFIG_REQUIRE],[
# If this shell variable is not 1, then this m4 is being invoked
# "early" via AC REQUIRE. Therefore, since we like having fairly
# readable configure output, print out a nice banner explaining why
# this is coming early.
AS_IF([test "$opal_hwloc_its_time_to_configure" != "1"],
[echo " "
echo "==> Pre-emptively configuring the hwloc framework to satisfy dependencies."])
# See if we want hwloc, and if so, internal vs external
AC_ARG_WITH(hwloc,
AC_HELP_STRING([--with-hwloc(=DIR)],
[Build hwloc support. DIR can take one of three values: "internal", "external", or a valid directory name. "internal" (or no DIR value) forces Open MPI to use its internal copy of hwloc. "external" forces Open MPI to use an external installation of hwloc. Supplying a valid directory name also forces Open MPI to use an external installation of hwloc, and adds DIR/include, DIR/lib, and DIR/lib64 to the search path for headers and libraries.]))
# set defaults of not having any support
opal_hwloc_base_enable_xml=0
OPAL_HAVE_HWLOC=0
# Configure all the components - always have to do this, even if
# we configure --without-hwloc. Note that instead of passing in
# the traditional $1 and $2 as the first arguments, we hard-code
# "opal" and "hwloc", because this macro is invoked via AC
# REQUIRE.
MCA_CONFIGURE_FRAMEWORK([opal], [hwloc], 1)
# Strip any leading/trailing spaces
opal_hwloc_winner=`echo $MCA_hwloc_STATIC_COMPONENTS | sed -e 's/^[ ]+//' | sed -e 's/[ ]+$//'`
# Give a blank line to separate these messages from the last
# component's configure.m4 output.
echo " "
# Unless --with-hwloc[=<foo>] was given, it's ok to have no hwloc
# component.
AS_IF([test "$with_hwloc" = "no" -o "$with_hwloc" = ""], [],
[ # STOP_AT_FIRST_PRIORITY will guarantee that we find at most
# one. We need to check here that we found *at least* one.
AS_IF([test "$MCA_hwloc_STATIC_COMPONENTS" = ""],
[AC_MSG_WARN([Did not find a suitable static opal hwloc component])
AC_MSG_ERROR([Cannot continue])])
# If there's any spaces in the middle of the string, then we
# found more than 1 eligible static component. That's no good
# (and should never happen, but let's be sure)!
AS_IF([test "`echo $opal_hwloc_winner | sed 's/ //'`" != "$opal_hwloc_winner"],
[AC_MSG_WARN([Found more than 1 eligible static opal hwloc component])
AC_MSG_WARN([This should never happen!])
AC_MSG_ERROR([Cannot continue])])
])
# If we have a winning component, do some more logic
AS_IF([test "$MCA_hwloc_STATIC_COMPONENTS" != ""],
[ # We had a winner -- w00t!
OPAL_HAVE_HWLOC=1
# The winning component will have told us where their header file
# is located
AC_MSG_CHECKING([for winning hwloc component header file])
eval "opal_hwloc_base_include=\`echo \$opal_hwloc_${opal_hwloc_winner}_include\`"
AS_IF([test "$opal_hwloc_base_include" = ""],
[AC_MSG_RESULT([missing])
AC_MSG_WARN([Missing implementation header])
AC_MSG_ERROR([Cannot continue])])
AC_MSG_RESULT([$opal_hwloc_base_include])
AC_DEFINE_UNQUOTED([MCA_hwloc_IMPLEMENTATION_HEADER],
["$opal_hwloc_base_include"],
[Header to include for hwloc implementation])
# See if they set any flags for us
_MCA_opal_hwloc_base_flags([CPPFLAGS], [CPPFLAGS])
_MCA_opal_hwloc_base_flags([LDFLAGS], [LDFLAGS])
_MCA_opal_hwloc_base_flags([LIBS], [LIBS])
_MCA_opal_hwloc_base_flags([wrapper CPPFLAGS], [WRAPPER_EXTRA_CPPFLAGS])
_MCA_opal_hwloc_base_flags([wrapper LDFLAGS], [WRAPPER_EXTRA_LDFLAGS])
_MCA_opal_hwloc_base_flags([wrapper LIBS], [WRAPPER_EXTRA_LIBS])
# If we added any -L flags to ADD_LDFLAGS, then we (might)
# need to add those directories to LD_LIBRARY_PATH.
# Otherwise, if we try to AC RUN_IFELSE anything here in
# configure, it might die because it can't find the libraries
# we just linked against.
found_l=0
eval "tmp=\$opal_hwloc_${opal_hwloc_winner}_ADD_LIBS"
for token in $tmp; do
case $token in
-l*) found_l=1 ;;
esac
done
AS_IF([test $found_l -eq 1],
[eval "tmp=\$opal_hwloc_${opal_hwloc_winner}_ADD_LDFLAGS"
for token in $tmp; do
case $token in
-L*)
dir=`echo $token | cut -c3-`
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$dir
AC_MSG_WARN([Adding to (DY)LD_LIBRARY_PATH: $dir])
;;
esac
done])
])
AM_CONDITIONAL(OPAL_HAVE_HWLOC, test $OPAL_HAVE_HWLOC -eq 1)
AC_DEFINE_UNQUOTED(OPAL_HAVE_HWLOC, $OPAL_HAVE_HWLOC,
[Whether we have hwloc support or not])
# Similar to above, if this m4 is being invoked "early" via AC
# REQUIRE, print out a nice banner that we have now finished
# pre-emption and are returning to the Normal Order Of Things.
AS_IF([test "$opal_hwloc_its_time_to_configure" != "1"],
[echo " "
echo "<== Pre-emptive hwloc framework configuration complete."
echo "<== We now return you to your regularly scheduled programming."
echo " "]);
])
dnl Helper function
dnl $1 = message to display
dnl $2 = output variable to set / input variable suffix
AC_DEFUN([_MCA_opal_hwloc_base_flags],[
AC_MSG_CHECKING([for winning hwloc component additional $1])
eval "opal_hwloc_base_tmp=\`echo \$opal_hwloc_${opal_hwloc_winner}_ADD_$2\`"
AS_IF([test "$opal_hwloc_base_tmp" != ""],
[AC_MSG_RESULT([$opal_hwloc_base_tmp])
$2="[$]$2 $opal_hwloc_base_tmp"],
[AC_MSG_RESULT([none])])
])dnl
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