openmpi/config/opal_setup_wrappers.m4

dnl -*- shell-script -*-
dnl
dnl Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
dnl                         University Research and Technology
dnl                         Corporation.  All rights reserved.
dnl Copyright (c) 2004-2005 The University of Tennessee and The University
dnl                         of Tennessee Research Foundation.  All rights
dnl                         reserved.
dnl Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
dnl                         University of Stuttgart.  All rights reserved.
dnl Copyright (c) 2004-2005 The Regents of the University of California.
dnl                         All rights reserved.
dnl Copyright (c) 2006-2010 Oracle and/or its affiliates.  All rights reserved.
dnl Copyright (c) 2009-2016 Cisco Systems, Inc.  All rights reserved.
dnl Copyright (c) 2015-2017 Research Organization for Information Science
dnl                         and Technology (RIST). All rights reserved.
dnl Copyright (c) 2016      IBM Corporation.  All rights reserved.
dnl Copyright (c) 2020      Triad National Security, LLC. All rights
dnl                         reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl

# OPAL_WRAPPER_FLAGS_ADD(variable, new_argument)
# ----------------------------------------------
# Add new_argument to the list of arguments for variable in the
# wrapper compilers, if it's not already there.  For example:
#   OPAL_WRAPPER_FLAGS_ADD(CFLAGS, "-pthread")
# will add -pthread to the list of CFLAGS the wrappers use when invoked.
#
# This macro MAY NOT be invoked from configure macros for MCA components.
# See the comment in SETUP_WRAPPER_INIT (below) for more information.
AC_DEFUN([OPAL_WRAPPER_FLAGS_ADD], [
    m4_ifdef([mca_component_configure_active],
        [m4_fatal([OPAL_WRAPPER_FLAGS_ADD can not be called from a component configure])])
    m4_if([$1], [CPPFLAGS], [OPAL_FLAGS_APPEND_UNIQ([wrapper_extra_cppflags], [$2])],
          [$1], [CFLAGS], [OPAL_FLAGS_APPEND_UNIQ([wrapper_extra_cflags], [$2])],
          [$1], [CXXFLAGS], [OPAL_FLAGS_APPEND_UNIQ([wrapper_extra_cxxflags], [$2])],
          [$1], [FCFLAGS], [OPAL_FLAGS_APPEND_UNIQ([wrapper_extra_fcflags], [$2])],
          [$1], [LDFLAGS], [OPAL_FLAGS_APPEND_UNIQ([wrapper_extra_ldflags], [$2])],
          [$1], [LIBS], [OPAL_FLAGS_APPEND_UNIQ([wrapper_extra_libs], [$2])],
          [m4_fatal([Unknown wrapper flag type $1])])
])


# OPAL_SETUP_WRAPPER_INIT()
# -------------------------
# Setup wrapper compiler configuration information.  Should be called early to
# prevent lots of calculations and then an abort for a silly user typo.  This
# macro works in pair with OPAL_SETUP_WRAPPER_FINAL, which should be called
# almost at the end of configure (after the last call to OPAL_WRAPPER_FLAGS_ADD
# and after the MCA system has been setup).
#
# The wrapper compiler arguments are a little fragile and should NOT
# be edited by configure directly.  Instead, main configure should use
# OPAL_WRAPPER_FLAGS_ADD.
#
# When building statically, the MCA system will add
# <framework>_<component>_WRAPPER_EXTRA_{LDFLAGS, LIBS} if set and try
# to add <framework>_<component>_{LDFLAGS, LIBS} (if not an external
# configure) to the wrapper LDFLAGS and LIBS.  Any arguments in
# <framework>_<component>_WRAPPER_EXTRA_CPPFLAGS are passed to the
# wrapper compilers IF AND ONLY IF the framework was a STOP_AT_FIRST
# framework, the component is a static component, and devel headers
# are installed.  Note that MCA components are ONLY allowed to
# (indirectly) influence the wrapper CPPFLAGS, LDFLAGS, and LIBS.
# That is, a component may not influence CFLAGS, CXXFLAGS, or FCFLAGS.
#
# Notes:
#   * Keep user flags separate as 1) they should have no influence
#     over build and 2) they don't go through the uniqification we do
#     with the other wrapper compiler options
#   * While the user (the person who runs configure) is allowed to set
#     <flag>_prefix, configure is not.  There's no known use case for
#     doing so, and we'd like to force the issue.
AC_DEFUN([OPAL_SETUP_WRAPPER_INIT],[
    AC_ARG_WITH([wrapper-cflags],
                [AC_HELP_STRING([--with-wrapper-cflags],
                                [Extra flags to add to CFLAGS when using mpicc])])
    AS_IF([test "$with_wrapper_cflags" = "yes" || test "$with_wrapper_cflags" = "no"],
          [AC_MSG_ERROR([--with-wrapper-cflags must have an argument.])])

    AC_ARG_WITH([wrapper-cflags-prefix],
                [AC_HELP_STRING([--with-wrapper-cflags-prefix],
                                [Extra flags (before user flags) to add to CFLAGS when using mpicc])])
    AS_IF([test "$with_wrapper_cflags_prefix" = "yes" || test "$with_wrapper_cflags_prefix" = "no"],
          [AC_MSG_ERROR([--with-wrapper-cflags-prefix must have an argument.])])

    AC_ARG_WITH([wrapper-cxxflags],
        [AC_HELP_STRING([--with-wrapper-cxxflags],
                        [Extra flags to add to CXXFLAGS when using mpiCC/mpic++])])
    AS_IF([test "$with_wrapper_cxxflags" = "yes" || test "$with_wrapper_cxxflags" = "no"],
          [AC_MSG_ERROR([--with-wrapper-cxxflags must have an argument.])])

    AC_ARG_WITH([wrapper-cxxflags-prefix],
        [AC_HELP_STRING([--with-wrapper-cxxflags-prefix],
                        [Extra flags to add to CXXFLAGS when using mpiCC/mpic++])])
    AS_IF([test "$with_wrapper_cxxflags_prefix" = "yes" || test "$with_wrapper_cxxflags_prefix" = "no"],
          [AC_MSG_ERROR([--with-wrapper-cxxflags-prefix must have an argument.])])

    m4_ifdef([project_ompi], [
            AC_ARG_WITH([wrapper-fcflags],
                [AC_HELP_STRING([--with-wrapper-fcflags],
                        [Extra flags to add to FCFLAGS when using mpifort])])
            AS_IF([test "$with_wrapper_fcflags" = "yes" || test "$with_wrapper_fcflags" = "no"],
                [AC_MSG_ERROR([--with-wrapper-fcflags must have an argument.])])

            AC_ARG_WITH([wrapper-fcflags-prefix],
                [AC_HELP_STRING([--with-wrapper-fcflags-prefix],
                        [Extra flags (before user flags) to add to FCFLAGS when using mpifort])])
            AS_IF([test "$with_wrapper_fcflags_prefix" = "yes" || test "$with_wrapper_fcflags_prefix" = "no"],
                [AC_MSG_ERROR([--with-wrapper-fcflags-prefix must have an argument.])])])

    AC_ARG_WITH([wrapper-ldflags],
                [AC_HELP_STRING([--with-wrapper-ldflags],
                                [Extra flags to add to LDFLAGS when using wrapper compilers])])
    AS_IF([test "$with_wrapper_ldflags" = "yes" || test "$with_wrapper_ldflags" = "no"],
          [AC_MSG_ERROR([--with-wrapper-ldflags must have an argument.])])

    AC_ARG_WITH([wrapper-libs],
                [AC_HELP_STRING([--with-wrapper-libs],
                                [Extra flags to add to LIBS when using wrapper compilers])])
    AS_IF([test "$with_wrapper_libs" = "yes" || test "$with_wrapper_libs" = "no"],
          [AC_MSG_ERROR([--with-wrapper-libs must have an argument.])])

    AC_MSG_CHECKING([if want wrapper compiler rpath support])
    AC_ARG_ENABLE([wrapper-rpath],
                  [AS_HELP_STRING([--enable-wrapper-rpath],
                  [enable rpath/runpath support in the wrapper compilers (default=yes)])])
    AS_IF([test "$enable_wrapper_rpath" != "no"], [enable_wrapper_rpath=yes])
    AC_MSG_RESULT([$enable_wrapper_rpath])

    AC_MSG_CHECKING([if want wrapper compiler runpath support])
    AC_ARG_ENABLE([wrapper-runpath],
                  [AS_HELP_STRING([--enable-wrapper-runpath],
                  [enable runpath in the wrapper compilers if linker supports it (default: enabled,  unless wrapper-rpath is disabled).])])
    AS_IF([test "$enable_wrapper_runpath" != "no"], [enable_wrapper_runpath=yes])
    AC_MSG_RESULT([$enable_wrapper_runpath])

    AS_IF([test "$enable_wrapper_rpath" = "no" && test "$enable_wrapper_runpath" = "yes"],
          [AC_MSG_ERROR([--enable-wrapper-runpath cannot be selected with --disable-wrapper-rpath])])
])

# OPAL_LIBTOOL_CONFIG(libtool-variable, result-variable,
#                     libtool-tag, extra-code)
# Retrieve information from the generated libtool
AC_DEFUN([OPAL_LIBTOOL_CONFIG],[
    OPAL_VAR_SCOPE_PUSH([rpath_script rpath_outfile])
    # Output goes into globally-visible variable.  Run this in a
    # sub-process so that we don't pollute the current process
    # environment.
    rpath_script=conftest.$$.sh
    rpath_outfile=conftest.$$.out
    rm -f $rpath_script $rpath_outfile
    cat > $rpath_script <<EOF
#!/bin/sh

# Slurp in the libtool config into my environment

# Apparently, "libtoool --config" calls "exit", so we can't source it
# (because if script A sources script B, and B calls "exit", then both
# B and A will exit).  Instead, we have to send the output to a file
# and then source that.
$OPAL_TOP_BUILDDIR/libtool $3 --config > $rpath_outfile

chmod +x $rpath_outfile
. ./$rpath_outfile
rm -f $rpath_outfile

# Evaluate \$$1, and substitute in LIBDIR for \$libdir
$4
flags="\`eval echo \$$1\`"
echo \$flags

# Done
exit 0
EOF
    chmod +x $rpath_script
    $2=`./$rpath_script`
    rm -f $rpath_script
    OPAL_VAR_SCOPE_POP
])

# Check to see whether the linker supports DT_RPATH.  We'll need to
# use config.rpath to find the flags that it needs, if it does (see
# comments in config.rpath for an explanation of where it came from).
AC_DEFUN([OPAL_SETUP_RPATH],[
    OPAL_VAR_SCOPE_PUSH([rpath_libdir_save])
    AC_MSG_CHECKING([if linker supports RPATH])
    OPAL_LIBTOOL_CONFIG([hardcode_libdir_flag_spec],[rpath_args],[],[libdir=LIBDIR])

    AS_IF([test -n "$rpath_args"],
          [WRAPPER_RPATH_SUPPORT=rpath
           OPAL_LIBTOOL_CONFIG([hardcode_libdir_flag_spec],[rpath_fc_args],[--tag=FC],[libdir=LIBDIR])
           AC_MSG_RESULT([yes ($rpath_args + $rpath_fc_args)])],
          [WRAPPER_RPATH_SUPPORT=unnecessary
           AC_MSG_RESULT([yes (no extra flags needed)])])

    OPAL_VAR_SCOPE_POP

    # If we found RPATH support, check for RUNPATH support, too
    AS_IF([test "$WRAPPER_RPATH_SUPPORT" = "rpath"],
          [OPAL_SETUP_RUNPATH])
])

# Check to see if the linker supports the DT_RUNPATH flags via
# --enable-new-dtags (a GNU ld-specific option).  These flags are more
# social than DT_RPATH -- they can be overridden by LD_LIBRARY_PATH
# (where a regular DT_RPATH cannot).
#
# If DT_RUNPATH is supported, then we'll use *both* the RPATH and
# RUNPATH flags in the LDFLAGS.
AC_DEFUN([OPAL_SETUP_RUNPATH],[
    OPAL_VAR_SCOPE_PUSH([LDFLAGS_save wl_fc])

    # Set the output in $runpath_args
    runpath_args=
    runpath_fc_args=
    LDFLAGS_save=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,--enable-new-dtags"
    AS_IF([test x"$enable_wrapper_runpath" = x"yes"],
           [AC_LANG_PUSH([C])
            AC_MSG_CHECKING([if linker supports RUNPATH])
            AC_LINK_IFELSE([AC_LANG_PROGRAM([], [return 7;])],
                           [WRAPPER_RPATH_SUPPORT=runpath
                            runpath_args="-Wl,--enable-new-dtags"
                            AC_MSG_RESULT([yes (-Wl,--enable-new-dtags)])],
                           [AC_MSG_RESULT([no])])
            AC_LANG_POP([C])
            m4_ifdef([project_ompi],
                     [OPAL_LIBTOOL_CONFIG([wl],[wl_fc],[--tag=FC],[])
                      LDFLAGS="$LDFLAGS_save ${wl_fc}--enable-new-dtags"
                      AC_LANG_PUSH([Fortran])
                      AC_LINK_IFELSE([AC_LANG_SOURCE([[program test 
end program]])],
                                     [runpath_fc_args="${wl_fc}--enable-new-dtags"
                                      AC_MSG_RESULT([yes (-Wl,--enable-new-dtags)])],
                                     [AC_MSG_RESULT([no])])
                      AC_LANG_POP([Fortran])])])

    LDFLAGS=$LDFLAGS_save

    OPAL_VAR_SCOPE_POP
])

# Called to find all -L arguments in the LDFLAGS and add in RPATH args
# for each of them.  Then also add in an RPATH for @{libdir} (which
# will be replaced by the wrapper compile to the installdir libdir at
# runtime), and the RUNPATH args, if we have them.
AC_DEFUN([RPATHIFY_LDFLAGS_INTERNAL],[
    OPAL_VAR_SCOPE_PUSH([rpath_out rpath_dir rpath_tmp])
    AS_IF([test "$enable_wrapper_rpath" = "yes" && test "$WRAPPER_RPATH_SUPPORT" != "disabled" && test "$WRAPPER_RPATH_SUPPORT" != "unnecessary"], [
           rpath_out=""
           for val in ${$1}; do
               case $val in
               -L*)
                   rpath_dir=`echo $val | cut -c3-`
                   rpath_tmp=`echo ${$2} | sed -e s@LIBDIR@$rpath_dir@`
                   rpath_out="$rpath_out $rpath_tmp"
                   ;;
               esac
           done

           # Now add in the RPATH args for @{libdir}, and the RUNPATH args
           rpath_tmp=`echo ${$2} | sed -e s/LIBDIR/@{libdir}/`
           $1="${$1} $rpath_out $rpath_tmp ${$3}"
          ])
    OPAL_VAR_SCOPE_POP
])

AC_DEFUN([RPATHIFY_LDFLAGS],[RPATHIFY_LDFLAGS_INTERNAL([$1], [rpath_args], [runpath_args])])

AC_DEFUN([RPATHIFY_FC_LDFLAGS],[RPATHIFY_LDFLAGS_INTERNAL([$1], [rpath_fc_args], [runpath_fc_args])])

dnl
dnl Avoid some repetitive code below
dnl
AC_DEFUN([_OPAL_SETUP_WRAPPER_FINAL_PKGCONFIG],[
    AC_MSG_CHECKING([for $1 pkg-config LDFLAGS])
    $1_PKG_CONFIG_LDFLAGS=`echo "$$1_WRAPPER_EXTRA_LDFLAGS" | sed -e 's/@{libdir}/\${libdir}/g'`
    AC_SUBST([$1_PKG_CONFIG_LDFLAGS])
    AC_MSG_RESULT([$$1_PKG_CONFIG_LDFLAGS])
])


# OPAL_SETUP_WRAPPER_FINAL()
# ---------------------------
AC_DEFUN([OPAL_SETUP_WRAPPER_FINAL],[

    # Setup RPATH support, if desired
    WRAPPER_RPATH_SUPPORT=disabled
    AS_IF([test "$enable_wrapper_rpath" = "yes"],
          [OPAL_SETUP_RPATH])
    AS_IF([test "$enable_wrapper_rpath" = "yes" && test "$WRAPPER_RPATH_SUPPORT" = "disabled"],
          [AC_MSG_WARN([RPATH support requested but not available])
           AC_MSG_ERROR([Cannot continue])])

    # Note that we have to setup <package>_PKG_CONFIG_LDFLAGS for the
    # pkg-config files to parallel the
    # <package>_WRAPPER_EXTRA_LDFLAGS.  This is because pkg-config
    # will not understand the @{libdir} notation in
    # *_WRAPPER_EXTRA_LDFLAGS; we have to translate it to ${libdir}.

    # We now have all relevant flags.  Substitute them in everywhere.
    m4_ifdef([project_opal], [
       AC_MSG_CHECKING([for OPAL CPPFLAGS])
       if test "$WANT_INSTALL_HEADERS" = "1" ; then
           OPAL_WRAPPER_EXTRA_CPPFLAGS='-I${includedir}/openmpi'
       fi
       OPAL_WRAPPER_EXTRA_CPPFLAGS="$OPAL_WRAPPER_EXTRA_CPPFLAGS $opal_mca_wrapper_extra_cppflags $wrapper_extra_cppflags $with_wrapper_cppflags"
       AC_SUBST([OPAL_WRAPPER_EXTRA_CPPFLAGS])
       AC_MSG_RESULT([$OPAL_WRAPPER_EXTRA_CPPFLAGS])

       AC_MSG_CHECKING([for OPAL CFLAGS])
       OPAL_WRAPPER_EXTRA_CFLAGS="$wrapper_extra_cflags $with_wrapper_cflags"
       AC_SUBST([OPAL_WRAPPER_EXTRA_CFLAGS])
       AC_MSG_RESULT([$OPAL_WRAPPER_EXTRA_CFLAGS])

       AC_MSG_CHECKING([for OPAL CFLAGS_PREFIX])
       OPAL_WRAPPER_EXTRA_CFLAGS_PREFIX="$with_wrapper_cflags_prefix"
       AC_SUBST([OPAL_WRAPPER_EXTRA_CFLAGS_PREFIX])
       AC_MSG_RESULT([$OPAL_WRAPPER_EXTRA_CFLAGS_PREFIX])

       AC_MSG_CHECKING([for OPAL CXXFLAGS])
       OPAL_WRAPPER_EXTRA_CXXFLAGS="$wrapper_extra_cxxflags $with_wrapper_cxxflags"
       AC_SUBST([OPAL_WRAPPER_EXTRA_CXXFLAGS])
       AC_MSG_RESULT([$OPAL_WRAPPER_EXTRA_CXXFLAGS])

       AC_MSG_CHECKING([for OPAL CXXFLAGS_PREFIX])
       OPAL_WRAPPER_EXTRA_CXXFLAGS_PREFIX="$with_wrapper_cxxflags_prefix"
       AC_SUBST([OPAL_WRAPPER_EXTRA_CXXFLAGS_PREFIX])
       AC_MSG_RESULT([$OPAL_WRAPPER_EXTRA_CXXFLAGS_PREFIX])

       AC_MSG_CHECKING([for OPAL LDFLAGS])
       OPAL_WRAPPER_EXTRA_LDFLAGS="$opal_mca_wrapper_extra_ldflags $wrapper_extra_ldflags $with_wrapper_ldflags"
       RPATHIFY_LDFLAGS([OPAL_WRAPPER_EXTRA_LDFLAGS])
       AC_SUBST([OPAL_WRAPPER_EXTRA_LDFLAGS])
       AC_MSG_RESULT([$OPAL_WRAPPER_EXTRA_LDFLAGS])

       # Convert @{libdir} to ${libdir} for pkg-config
       _OPAL_SETUP_WRAPPER_FINAL_PKGCONFIG([OPAL])

       # wrapper_extra_libs doesn't really get populated until after the mca system runs
       # since most of the libs come from libtool.  So this is the first time we can
       # uniq them.  ROMIO in particular adds lots of things already in wrapper_extra_libs,
       # and this cleans the duplication up a bunch.  Always add everything the user
       # asked for, as they know better than us.
       AC_MSG_CHECKING([for OPAL LIBS])
       OPAL_WRAPPER_EXTRA_LIBS="$opal_mca_wrapper_extra_libs"
       OPAL_FLAGS_APPEND_UNIQ([OPAL_WRAPPER_EXTRA_LIBS], [$wrapper_extra_libs])
       OPAL_WRAPPER_EXTRA_LIBS="$OPAL_WRAPPER_EXTRA_LIBS $with_wrapper_libs"
       AC_SUBST([OPAL_WRAPPER_EXTRA_LIBS])
       AC_MSG_RESULT([$OPAL_WRAPPER_EXTRA_LIBS])
    ])

    m4_ifdef([project_orte], [
       AC_MSG_CHECKING([for ORTE CPPFLAGS])
       if test "$WANT_INSTALL_HEADERS" = "1" ; then
           ORTE_WRAPPER_EXTRA_CPPFLAGS='-I${includedir}/openmpi'
       fi
       ORTE_WRAPPER_EXTRA_CPPFLAGS="$ORTE_WRAPPER_EXTRA_CPPFLAGS $orte_mca_wrapper_extra_cppflags $wrapper_extra_cppflags $with_wrapper_cppflags"
       AC_SUBST([ORTE_WRAPPER_EXTRA_CPPFLAGS])
       AC_MSG_RESULT([$ORTE_WRAPPER_EXTRA_CPPFLAGS])

       AC_MSG_CHECKING([for ORTE CFLAGS])
       ORTE_WRAPPER_EXTRA_CFLAGS="$wrapper_extra_cflags $with_wrapper_cflags"
       AC_SUBST([ORTE_WRAPPER_EXTRA_CFLAGS])
       AC_MSG_RESULT([$ORTE_WRAPPER_EXTRA_CFLAGS])

       AC_MSG_CHECKING([for ORTE CFLAGS_PREFIX])
       ORTE_WRAPPER_EXTRA_CFLAGS_PREFIX="$with_wrapper_cflags_prefix"
       AC_SUBST([ORTE_WRAPPER_EXTRA_CFLAGS_PREFIX])
       AC_MSG_RESULT([$ORTE_WRAPPER_EXTRA_CFLAGS_PREFIX])

       AC_MSG_CHECKING([for ORTE LDFLAGS])
       ORTE_WRAPPER_EXTRA_LDFLAGS="$orte_mca_wrapper_extra_ldflags $wrapper_extra_ldflags $with_wrapper_ldflags"
       RPATHIFY_LDFLAGS([ORTE_WRAPPER_EXTRA_LDFLAGS])
       AC_SUBST([ORTE_WRAPPER_EXTRA_LDFLAGS])
       AC_MSG_RESULT([$ORTE_WRAPPER_EXTRA_LDFLAGS])

       # Convert @{libdir} to ${libdir} for pkg-config
       _OPAL_SETUP_WRAPPER_FINAL_PKGCONFIG([ORTE])

       AC_MSG_CHECKING([for ORTE LIBS])
       ORTE_WRAPPER_EXTRA_LIBS="$orte_mca_wrapper_extra_libs"
       OPAL_FLAGS_APPEND_UNIQ([ORTE_WRAPPER_EXTRA_LIBS], [$wrapper_extra_libs])
       ORTE_WRAPPER_EXTRA_LIBS="$ORTE_WRAPPER_EXTRA_LIBS $with_wrapper_libs"
       AC_SUBST([ORTE_WRAPPER_EXTRA_LIBS])
       AC_MSG_RESULT([$ORTE_WRAPPER_EXTRA_LIBS])

       m4_ifdef([project_ompi], [], [
          # these are used by orte_info/ompi_info (yes, they are named poorly)
          AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_CFLAGS, "$ORTE_WRAPPER_EXTRA_CFLAGS",
              [Additional CFLAGS to pass through the wrapper compilers])
          AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_CFLAGS_PREFIX, "$ORTE_WRAPPER_EXTRA_CFLAGS_PREFIX",
              [Additional CFLAGS_PREFIX to pass through the wrapper compilers])
          AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_LDFLAGS, "$ORTE_WRAPPER_EXTRA_LDFLAGS",
              [Additional LDFLAGS to pass through the wrapper compilers])
          AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_LIBS, "$ORTE_WRAPPER_EXTRA_LIBS",
              [Additional LIBS to pass through the wrapper compilers])
       ])
    ])

    m4_ifdef([project_ompi], [
       AC_MSG_CHECKING([for OMPI CPPFLAGS])
       if test "$WANT_INSTALL_HEADERS" = "1" ; then
           OMPI_WRAPPER_EXTRA_CPPFLAGS='-I${includedir}/openmpi'
       fi
       OMPI_WRAPPER_EXTRA_CPPFLAGS="$OMPI_WRAPPER_EXTRA_CPPFLAGS $ompi_mca_wrapper_extra_cppflags $wrapper_extra_cppflags $with_wrapper_cppflags"
       AC_SUBST([OMPI_WRAPPER_EXTRA_CPPFLAGS])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_CPPFLAGS])

       AC_MSG_CHECKING([for OMPI CFLAGS])
       OMPI_WRAPPER_EXTRA_CFLAGS="$wrapper_extra_cflags $with_wrapper_cflags"
       AC_SUBST([OMPI_WRAPPER_EXTRA_CFLAGS])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_CFLAGS])

       AC_MSG_CHECKING([for OMPI CFLAGS_PREFIX])
       OMPI_WRAPPER_EXTRA_CFLAGS_PREFIX="$with_wrapper_cflags_prefix"
       AC_SUBST([OMPI_WRAPPER_EXTRA_CFLAGS_PREFIX])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_CFLAGS_PREFIX])

       AC_MSG_CHECKING([for OMPI CXXFLAGS])
       OMPI_WRAPPER_EXTRA_CXXFLAGS="$wrapper_extra_cxxflags $with_wrapper_cxxflags"
       AC_SUBST([OMPI_WRAPPER_EXTRA_CXXFLAGS])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_CXXFLAGS])

       AC_MSG_CHECKING([for OMPI CXXFLAGS_PREFIX])
       OMPI_WRAPPER_EXTRA_CXXFLAGS_PREFIX="$with_wrapper_cxxflags_prefix"
       AC_SUBST([OMPI_WRAPPER_EXTRA_CXXFLAGS_PREFIX])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_CXXFLAGS_PREFIX])

       AC_MSG_CHECKING([for OMPI FCFLAGS])
       OMPI_WRAPPER_EXTRA_FCFLAGS="$wrapper_extra_fcflags $with_wrapper_fcflags"
       if test "$OMPI_FC_MODULE_FLAG" != "" ; then
           OMPI_WRAPPER_EXTRA_FCFLAGS="$OMPI_WRAPPER_EXTRA_FCFLAGS $OMPI_FC_MODULE_FLAG"'${libdir}'
       fi
       AC_SUBST([OMPI_WRAPPER_EXTRA_FCFLAGS])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_FCFLAGS])

       AC_MSG_CHECKING([for OMPI FCFLAGS_PREFIX])
       OMPI_WRAPPER_EXTRA_FCFLAGS_PREFIX="$with_wrapper_fcflags_prefix"
       AC_SUBST([OMPI_WRAPPER_EXTRA_FCFLAGS_PREFIX])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_FCFLAGS_PREFIX])

       AC_MSG_CHECKING([for OMPI LDFLAGS])
       OMPI_WRAPPER_EXTRA_LDFLAGS="$ompi_mca_wrapper_extra_ldflags $wrapper_extra_ldflags $with_wrapper_ldflags"
       OMPI_WRAPPER_EXTRA_FC_LDFLAGS=$OMPI_WRAPPER_EXTRA_LDFLAGS
       RPATHIFY_LDFLAGS([OMPI_WRAPPER_EXTRA_LDFLAGS])
       AC_SUBST([OMPI_WRAPPER_EXTRA_LDFLAGS])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_LDFLAGS])
       RPATHIFY_FC_LDFLAGS([OMPI_WRAPPER_EXTRA_FC_LDFLAGS])
       AC_SUBST([OMPI_WRAPPER_EXTRA_FC_LDFLAGS])

       # Convert @{libdir} to ${libdir} for pkg-config
       _OPAL_SETUP_WRAPPER_FINAL_PKGCONFIG([OMPI])

       AC_MSG_CHECKING([for OMPI LIBS])
       OMPI_WRAPPER_EXTRA_LIBS="$ompi_mca_wrapper_extra_libs"
       OPAL_FLAGS_APPEND_UNIQ([OMPI_WRAPPER_EXTRA_LIBS], [$wrapper_extra_libs])
       OMPI_WRAPPER_EXTRA_LIBS="$OMPI_WRAPPER_EXTRA_LIBS $with_wrapper_libs"
       OPAL_FLAGS_APPEND_UNIQ([OMPI_WRAPPER_EXTRA_LIBS], [$LIBS])
       AC_SUBST([OMPI_WRAPPER_EXTRA_LIBS])
       AC_MSG_RESULT([$OMPI_WRAPPER_EXTRA_LIBS])

      # language binding support.  C++ is a bit different, as the
      # compiler should work even if there is no MPI C++ bindings
      # support.  However, we do want it to fail if there is no C++
      # compiler.
       if test "$WANT_MPI_CXX_SUPPORT" = "1" ; then
          OMPI_WRAPPER_CXX_LIB="-l${with_libmpi_name}_cxx"
          OMPI_WRAPPER_CXX_REQUIRED_FILE=""
       elif test "$CXX" = "none"; then
          OMPI_WRAPPER_CXX_LIB=""
          OMPI_WRAPPER_CXX_REQUIRED_FILE="not supported"
       else
          OMPI_WRAPPER_CXX_LIB=""
          OMPI_WRAPPER_CXX_REQUIRED_FILE=""
       fi
       AC_SUBST([OMPI_WRAPPER_CXX_LIB])
       AC_SUBST([OMPI_WRAPPER_CXX_REQUIRED_FILE])

       if test "$OMPI_TRY_FORTRAN_BINDINGS" -gt "$OMPI_FORTRAN_NO_BINDINGS" ; then
          OMPI_WRAPPER_FORTRAN_REQUIRED_FILE=""
       else
          OMPI_WRAPPER_FORTRAN_REQUIRED_FILE="not supported"
       fi
       AC_SUBST([OMPI_WRAPPER_FORTRAN_REQUIRED_FILE])

       # For script-based wrappers that don't do relocatable binaries.
       # Don't use if you don't have to.
       exec_prefix_save="${exec_prefix}"
       test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
       eval "OMPI_WRAPPER_INCLUDEDIR=\"${includedir}\""
       eval "OMPI_WRAPPER_LIBDIR=\"${libdir}\""
       exec_prefix="${exec_prefix_save}"
       AC_SUBST([OMPI_WRAPPER_INCLUDEDIR])
       AC_SUBST([OMPI_WRAPPER_LIBDIR])

       # if wrapper compilers were requested, set the ompi one up
       if test "$WANT_SCRIPT_WRAPPER_COMPILERS" = "1" ; then
         AC_CONFIG_FILES([ompi/tools/wrappers/ompi_wrapper_script],
                         [chmod +x ompi/tools/wrappers/ompi_wrapper_script])
       fi

       AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_CFLAGS, "$OMPI_WRAPPER_EXTRA_CFLAGS",
           [Additional CFLAGS to pass through the wrapper compilers])
       AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_CFLAGS_PREFIX, "$OMPI_WRAPPER_EXTRA_CFLAGS_PREFIX",
           [Additional CFLAGS_PREFIX to pass through the wrapper compilers])
       AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_CXXFLAGS, "$OMPI_WRAPPER_EXTRA_CXXFLAGS",
           [Additional CXXFLAGS to pass through the wrapper compilers])
       AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_CXXFLAGS_PREFIX, "$OMPI_WRAPPER_EXTRA_CXXFLAGS_PREFIX",
           [Additional CXXFLAGS_PREFIX to pass through the wrapper compilers])
       AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_FCFLAGS, "$OMPI_WRAPPER_EXTRA_FCFLAGS",
           [Additional FCFLAGS to pass through the wrapper compilers])
       AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_FCFLAGS_PREFIX, "$OMPI_WRAPPER_EXTRA_FCFLAGS_PREFIX",
           [Additional FCFLAGS to pass through the wrapper compilers])
       AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_LDFLAGS, "$OMPI_WRAPPER_EXTRA_LDFLAGS",
           [Additional LDFLAGS to pass through the wrapper compilers])
       AC_DEFINE_UNQUOTED(WRAPPER_EXTRA_LIBS, "$OMPI_WRAPPER_EXTRA_LIBS",
           [Additional LIBS to pass through the wrapper compilers])
    ])

    AC_DEFINE_UNQUOTED(WRAPPER_RPATH_SUPPORT, "$WRAPPER_RPATH_SUPPORT",
        [Whether the wrapper compilers add rpath flags by default])
])