Clean up variables used in configure with OPAL_VAR_SCOPE.

This is helpful in the work for #3694: ensure that many places that eventually end up in configure don't overly-pollute the global shell variable space (because debugging accidental shell variable pollution can be a real pain). Refs trac:3694 This commit was SVN r29830. The following Trac tickets were found above: Ticket 3694 --> https://svn.open-mpi.org/trac/ompi/ticket/3694
2013-12-06 23:40:34 +00:00 · 2013-12-06 23:40:34 +00:00 · 3bd9c603ff
--- a/config/ompi_check_func_lib.m4
+++ b/config/ompi_check_func_lib.m4
@ -10,7 +10,7 @@ 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) 2010      Cisco Systems, Inc.  All rights reserved.
+dnl Copyright (c) 2010-2013 Cisco Systems, Inc.  All rights reserved.
 dnl $COPYRIGHT$
 dnl 
 dnl Additional copyrights may follow
@ -26,6 +26,7 @@ dnl
 # in LIBS) then lib is added to LIBS.  If func is not in lib, then
 # LIBS is not modified.
 AC_DEFUN([OMPI_CHECK_FUNC_LIB],[
+    OPAL_VAR_SCOPE_PUSH([LIBS_save])
    AS_VAR_PUSHDEF([ompi_var], [ompi_cv_func_lib_$1_$2])dnl
    AC_CACHE_CHECK([if we need -l$2 for $1],
        ompi_var,
@ -45,4 +46,5 @@ AC_DEFUN([OMPI_CHECK_FUNC_LIB],[
    # so will check in -l$2 if we decided we needed it above
    AC_CHECK_FUNCS([$1], $3, $4)
    AS_VAR_POPDEF([ompi_var])dnl
+    OPAL_VAR_SCOPE_POP
 ])
--- a/config/ompi_check_libfca.m4
+++ b/config/ompi_check_libfca.m4
@ -2,6 +2,7 @@
 #
 # Copyright (c) 2011 Mellanox Technologies. All rights reserved.

+# Copyright (c) 2013 Cisco Systems, Inc.  All rights reserved.
 # $COPYRIGHT$
 # 
 # Additional copyrights may follow
@ -15,6 +16,8 @@
 # LDFLAGS, LIBS} as needed and runs action-if-found if there is
 # support, otherwise executes action-if-not-found
 AC_DEFUN([OMPI_CHECK_FCA],[
+    OPAL_VAR_SCOPE_PUSH([ompi_check_fca_dir ompi_check_fca_libdir ompi_check_fca_incdir ompi_check_fca_libs ompi_check_fca_happy CPPFLAGS_save LDFLAGS_save LIBS_save])
+
    AC_ARG_WITH([fca],
        [AC_HELP_STRING([--with-fca(=DIR)],
             [Build fca (Mellanox Fabric Collective Accelerator) support, searching for libraries in DIR])])
@ -61,5 +64,7 @@ AC_DEFUN([OMPI_CHECK_FCA],[
          [AS_IF([test ! -z "$with_fca" -a "$with_fca" != "no"],
                 [AC_MSG_ERROR([FCA support requested but not found.  Aborting])])
           $3])
+
+    OPAL_VAR_SCOPE_POP
 ])

--- a/config/ompi_check_libhcoll.m4
+++ b/config/ompi_check_libhcoll.m4
@ -2,6 +2,7 @@
 #
 # Copyright (c) 2011 Mellanox Technologies. All rights reserved.

+# Copyright (c) 2013 Cisco Systems, Inc.  All rights reserved.
 # $COPYRIGHT$
 # 
 # Additional copyrights may follow
@ -15,6 +16,8 @@
 # LDFLAGS, LIBS} as needed and runs action-if-found if there is
 # support, otherwise executes action-if-not-found
 AC_DEFUN([OMPI_CHECK_HCOLL],[
+    OPAL_VAR_SCOPE_PUSH([ompi_check_hcoll_dir ompi_hcoll_libdir ompi_check_hcoll_incdir ompi_check_hcoll_libs ompi_check_hcoll_happy CPPFLAGS_save LDFLAGS_save LIBS_save])
+
    AC_ARG_WITH([hcoll],
        [AC_HELP_STRING([--with-hcoll(=DIR)],
             [Build hcoll (Mellanox Hierarchical Collectives) support, searching for libraries in DIR])])
@ -63,5 +66,7 @@ AC_DEFUN([OMPI_CHECK_HCOLL],[
          [AS_IF([test ! -z "$with_hcoll" -a "$with_hcoll" != "no"],
                 [AC_MSG_ERROR([HCOLL support requested but not found.  Aborting])])
           $3])
+
+    OPAL_VAR_SCOPE_POP
 ])

--- a/config/ompi_fortran_check_real16_c_equiv.m4
+++ b/config/ompi_fortran_check_real16_c_equiv.m4
@ -10,7 +10,7 @@ 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) 2008-2012 Cisco Systems, Inc.  All rights reserved.
+dnl Copyright (c) 2008-2013 Cisco Systems, Inc.  All rights reserved.
 dnl Copyright (c) 2012      Oracle and/or its affiliates.  All rights reserved.
 dnl $COPYRIGHT$
 dnl 
@ -23,7 +23,6 @@ dnl
 # ----------------------------------------------------
 AC_DEFUN([OMPI_FORTRAN_CHECK_REAL16_C_EQUIV],[
    unset happy
-    unset CFLAGS_save
    OPAL_VAR_SCOPE_PUSH([happy define_value msg CFLAGS_save])
    AS_VAR_PUSHDEF([real16_matches_c_var], [ompi_cv_real16_c_equiv])

--- a/config/ompi_get_libtool_linker_flags.m4
+++ b/config/ompi_get_libtool_linker_flags.m4
@ -10,7 +10,7 @@ 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) 2010-2012 Cisco Systems, Inc.  All rights reserved.
+dnl Copyright (c) 2010-2013 Cisco Systems, Inc.  All rights reserved.
 dnl $COPYRIGHT$
 dnl 
 dnl Additional copyrights may follow
@ -164,6 +164,7 @@ AS_IF([test "x$enable_wrapper_rpath" = "xyes"],
       # ld-specific option).  These flags are more social than
       # DT_RPATH -- they can be overridden by LD_LIBRARY_PATH (where
       # a regular DT_RPATH cannot).
+       OPAL_VAR_SCOPE_PUSH([LDFLAGS_save])
       AC_MSG_CHECKING([if linker supports RUNPATH (vs. RPATH)])
       LDFLAGS_save=$LDFLAGS
       LDFLAGS="$LDFLAGS $rpath_args -Wl,--enable-new-dtags"
@ -176,5 +177,6 @@ AS_IF([test "x$enable_wrapper_rpath" = "xyes"],
       AC_LANG_POP([C])
       LDFLAGS=$LDFLAGS_save
       AC_MSG_RESULT([$msg])
+       OPAL_VAR_SCOPE_POP
      ])
 ])dnl
--- a/config/ompi_setup_fc.m4
+++ b/config/ompi_setup_fc.m4
@ -13,7 +13,7 @@ dnl                         All rights reserved.
 dnl Copyright (c) 2007      Los Alamos National Security, LLC.  All rights
 dnl                         reserved. 
 dnl Copyright (c) 2007      Sun Microsystems, Inc.  All rights reserved.
-dnl Copyright (c) 2009-2012 Cisco Systems, Inc.  All rights reserved.
+dnl Copyright (c) 2009-2013 Cisco Systems, Inc.  All rights reserved.
 dnl $COPYRIGHT$
 dnl 
 dnl Additional copyrights may follow
@ -50,7 +50,7 @@ AC_DEFUN_ONCE([_OMPI_SETUP_FC_COMPILER],[

 # General Fortran compiler setup
 AC_DEFUN([OMPI_SETUP_FC],[
-    OPAL_VAR_SCOPE_PUSH([ompi_fc_happy])
+    OPAL_VAR_SCOPE_PUSH([ompi_fc_happy LDFLAGS_save fc_version])

    # Force the intro banner to be displayed first
    AC_REQUIRE([_OMPI_SETUP_FC_BANNER])
--- a/config/opal_check_pthread_pids.m4
+++ b/config/opal_check_pthread_pids.m4
@ -9,7 +9,7 @@ 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) 2008-2011 Cisco Systems, Inc.  All rights reserved.
+dnl Copyright (c) 2008-2013 Cisco Systems, Inc.  All rights reserved.
 dnl $COPYRIGHT$
 dnl 
 dnl Additional copyrights may follow
@ -32,6 +32,8 @@ AC_DEFUN([OPAL_CHECK_PTHREAD_PIDS],[
 #

 AC_MSG_CHECKING([if threads have different pids (pthreads on linux)])
+
+OPAL_VAR_SCOPE_PUSH([CFLAGS_save CPPFLAGS_save LDFLAGS_save LIBS_save MSG])
 CFLAGS_save="$CFLAGS"
 CFLAGS="$CFLAGS $THREAD_CFLAGS"
 CPPFLAGS_save="$CPPFLAGS"
@ -107,4 +109,4 @@ AS_IF([test "$OPAL_THREADS_HAVE_DIFFERENT_PIDS" = "1"],
 # if pthreads is not available, then the system does not have an insane threads
 # model
 #
-unset MSG])dnl
+OPAL_VAR_SCOPE_POP])dnl
--- a/config/opal_setup_cc.m4
+++ b/config/opal_setup_cc.m4
@ -11,7 +11,7 @@ dnl                         University of Stuttgart.  All rights reserved.
 dnl Copyright (c) 2004-2006 The Regents of the University of California.
 dnl                         All rights reserved.
 dnl Copyright (c) 2007-2009 Sun Microsystems, Inc.  All rights reserved.
-dnl Copyright (c) 2008-2010 Cisco Systems, Inc.  All rights reserved.
+dnl Copyright (c) 2008-2013 Cisco Systems, Inc.  All rights reserved.
 dnl Copyright (c) 2012      Los Alamos National Security, LLC. All rights
 dnl                         reserved.
 dnl $COPYRIGHT$
@ -337,6 +337,7 @@ AC_DEFUN([_OMPI_PROG_CC],[
    #
    # Check for the compiler
    #
+    OPAL_VAR_SCOPE_PUSH([ompi_cflags_save dummy ompi_cc_arvgv0])
    ompi_cflags_save="$CFLAGS"
    AC_PROG_CC
    BASECC="`basename $CC`"
@ -346,4 +347,5 @@ AC_DEFUN([_OMPI_PROG_CC],[
    ompi_cc_argv0=[$]2
    OPAL_WHICH([$ompi_cc_argv0], [OPAL_CC_ABSOLUTE])
    AC_SUBST(OPAL_CC_ABSOLUTE)
+    OPAL_VAR_SCOPE_POP
 ])
--- a/config/opal_setup_java.m4
+++ b/config/opal_setup_java.m4
@ -34,6 +34,7 @@ AC_DEFUN([OPAL_SETUP_JAVA_BANNER],[
 AC_DEFUN([OPAL_SETUP_JAVA],[
    AC_REQUIRE([OPAL_SETUP_JAVA_BANNER])

+    OPAL_VAR_SCOPE_PUSH([orte_java_happy bad found dir jnih PATH_save CPPFLAGS_save])
    AC_ARG_ENABLE(java,
                  AC_HELP_STRING([--enable-java],
                                 [Enable Java-based support in the system - use this option to disable all Java-based compiler tests (default: enabled)]))
@ -202,5 +203,5 @@ AC_DEFUN([OPAL_SETUP_JAVA],[

    AC_DEFINE_UNQUOTED([OPAL_HAVE_JAVA_SUPPORT], [$HAVE_JAVA_SUPPORT], [do we have Java support])
    AM_CONDITIONAL(OPAL_HAVE_JAVA_SUPPORT, test "$opal_java_happy" = "yes")
-
+    OPAL_VAR_SCOPE_POP
 ])
--- a/config/opal_setup_libltdl.m4
+++ b/config/opal_setup_libltdl.m4
@ -9,7 +9,7 @@ dnl Copyright (c) 2004-2007 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) 2006-2012 Cisco Systems, Inc.  All rights reserved.
+dnl Copyright (c) 2006-2013 Cisco Systems, Inc.  All rights reserved.
 dnl Copyright (c) 2006-2008 Sun Microsystems, Inc.  All rights reserved.
 dnl Copyright (c) 2006-2007 Los Alamos National Security, LLC.  All rights
 dnl                         reserved. 
@ -145,6 +145,8 @@ AC_DEFUN([OPAL_SETUP_LIBLTDL],[
 # Setup to build the internal copy of libltdl
 #
 AC_DEFUN([_OPAL_SETUP_LIBLTDL_INTERNAL],[
+    OPAL_VAR_SCOPE_PUSH([CFLAGS_save CPPFLAGS_save])
+
    ompi_subdir_args="$ompi_subdir_args --enable-ltdl-convenience --disable-ltdl-install"
    if test "$enable_shared" = "yes"; then
        ompi_subdir_args="$ompi_subdir_args --enable-shared"
@ -192,4 +194,6 @@ AC_DEFUN([_OPAL_SETUP_LIBLTDL_INTERNAL],[
        AC_MSG_ERROR([Cannot continue])
    fi
    CFLAGS="$CFLAGS_save"
+
+    OPAL_VAR_SCOPE_POP
 ])dnl
--- a/config/orte_check_tm.m4
+++ b/config/orte_check_tm.m4
@ -10,7 +10,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
-# Copyright (c) 2006-2009 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2006-2013 Cisco Systems, Inc.  All rights reserved.
 # $COPYRIGHT$
 # 
 # Additional copyrights may follow
@ -21,6 +21,7 @@
 # ORTE_CHECK_TM_LIBS_FLAGS(prefix, [LIBS or LDFLAGS])
 # ---------------------------------------------------
 AC_DEFUN([ORTE_CHECK_TM_LIBS_FLAGS],[
+    OPAL_VAR_SCOPE_PUSH([orte_check_tm_flags])
    orte_check_tm_flags=`$orte_check_tm_pbs_config --libs`
    for orte_check_tm_val in $orte_check_tm_flags; do
        if test "`echo $orte_check_tm_val | cut -c1-2`" = "-l"; then
@ -33,12 +34,14 @@ AC_DEFUN([ORTE_CHECK_TM_LIBS_FLAGS],[
            fi
        fi
    done
+    OPAL_VAR_SCOPE_POP
 ])


 # ORTE_CHECK_TM(prefix, [action-if-found], [action-if-not-found])
 # --------------------------------------------------------
 AC_DEFUN([ORTE_CHECK_TM],[
+    OPAL_VAR_SCOPE_PUSH([orte_check_tm_found orte_check_tm_happy orte_check_tm_dir orte_check_tm_pbs_config LDFLAGS_save CPPFLAGS_save LIBS_save])
    AC_ARG_WITH([tm],
                [AC_HELP_STRING([--with-tm(=DIR)],
                                [Build TM (Torque, PBSPro, and compatible) support, optionally adding DIR/include, DIR/lib, and DIR/lib64 to the search path for headers and libraries])])
@ -142,4 +145,6 @@ AC_DEFUN([ORTE_CHECK_TM],[
          [AS_IF([test ! -z "$with_tm" -a "$with_tm" != "no"],
                 [AC_MSG_ERROR([TM support requested but not found.  Aborting])])
           $3])
+
+    OPAL_VAR_SCOPE_POP
 ])
--- a/configure.ac
+++ b/configure.ac
@ -76,13 +76,14 @@ AS_IF([test "$host" != "$target"],
       AC_MSG_WARN([Cross-compiling is only partially supported])
       AC_MSG_WARN([Proceed at your own risk!])])
 # AC_USE_SYSTEM_EXTENSIONS alters CFLAGS (e.g., adds -g -O2)
+OPAL_VAR_SCOPE_PUSH([CFLAGS_save])
 CFLAGS_save=$CFLAGS
 AC_USE_SYSTEM_EXTENSIONS
 # AC_USE_SYSTEM_EXTENSIONS will modify CFLAGS if nothing was in there
 # beforehand.  We don't want that.  So if there was nothing in
 # CFLAGS, put nothing back in there.
 AS_IF([test -z "$CFLAGS_save"], [CFLAGS=])
-CFLAGS_save=
+OPAL_VAR_SCOPE_POP

 #
 # Init automake
@ -455,6 +456,7 @@ OMPI_C_GET_ALIGNMENT(size_t, OPAL_ALIGNMENT_SIZE_T)
 # <stdbool.h> or any other help)
 #

+OPAL_VAR_SCOPE_PUSH([MSG])
 AC_MSG_CHECKING(for C bool type)
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 AC_INCLUDES_DEFAULT],
@ -464,11 +466,13 @@ AC_DEFINE_UNQUOTED(OPAL_NEED_C_BOOL, $OPAL_NEED_C_BOOL,
    [Whether the C compiler supports "bool" without any other help (such as <stdbool.h>)])
 AC_MSG_RESULT([$MSG])
 AC_CHECK_SIZEOF(_Bool)
+OPAL_VAR_SCOPE_POP

 #
 # Check for other compiler characteristics
 #

+OPAL_VAR_SCOPE_PUSH([CFLAGS_save])
 if test "$GCC" = "yes"; then

    # gcc 2.96 will emit oodles of warnings if you use "inline" with
@ -487,7 +491,7 @@ if test "$GCC" = "yes"; then
    # This also works nicely for gcc 3.x because "inline" will work on
    # the first check, and all is fine.  :-)

-    CFLAGS_save="$CFLAGS"
+    CFLAGS_save=$CFLAGS
    CFLAGS="$OMPI_CFLAGS_BEFORE_PICKY -Werror -ansi"
 fi
 AC_C_INLINE
@ -501,8 +505,9 @@ if test "x$ompi_cv_c_compiler_vendor" != "xmicrosoft"; then
 fi
 OMPI_C_WEAK_SYMBOLS
 if test "$GCC" = "yes"; then
-    CFLAGS="$CFLAGS_save"
+    CFLAGS=$CFLAGS_save
 fi
+OPAL_VAR_SCOPE_POP

 if test "x$CC" = "xicc"; then
    OMPI_CHECK_ICC_VARARGS
@ -653,6 +658,7 @@ AC_CHECK_HEADERS([net/if.h], [], [],
 # above).  If we do have it, then check to see if it actually works.
 # Define OPAL_USE_STDBOOL_H as approrpaite.
 AC_CHECK_HEADERS([stdbool.h], [have_stdbool_h=1], [have_stdbool_h=0])
+OPAL_VAR_SCOPE_PUSH([MSG])
 AC_MSG_CHECKING([if <stdbool.h> works])
 if test "$have_stdbool_h" = "1"; then
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
@ -669,6 +675,7 @@ fi
 AC_DEFINE_UNQUOTED(OPAL_USE_STDBOOL_H, $OPAL_USE_STDBOOL_H,
    [Whether to use <stdbool.h> or not])
 AC_MSG_RESULT([$MSG])
+OPAL_VAR_SCOPE_POP

 # checkpoint results
 AC_CACHE_SAVE
@ -703,6 +710,7 @@ AC_CHECK_DECLS([AF_UNSPEC, PF_UNSPEC, AF_INET6, PF_INET6],
 #endif])

 # SA_RESTART in signal.h
+OPAL_VAR_SCOPE_PUSH([MSG])
 AC_MSG_CHECKING([if SA_RESTART defined in signal.h])
 AC_EGREP_CPP(yes, [
 #include <signal.h>
@ -712,6 +720,7 @@ AC_EGREP_CPP(yes, [
 AC_DEFINE_UNQUOTED(OPAL_HAVE_SA_RESTART, $VALUE,
    [Whether we have SA_RESTART in <signal.h> or not])
 AC_MSG_RESULT([$MSG])
+OPAL_VAR_SCOPE_POP

 AC_CHECK_MEMBERS([struct sockaddr.sa_len], [], [], [
 #include <sys/types.h>
--- a/ompi/mca/btl/openib/configure.m4
+++ b/ompi/mca/btl/openib/configure.m4
@ -10,7 +10,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
-# Copyright (c) 2007-2010 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2007-2013 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2008-2011 Mellanox Technologies.  All rights reserved.
 # Copyright (c) 2011      Oracle and/or its affiliates.  All rights reserved.
 # Copyright (c) 2013      NVIDIA Corporation.  All rights reserved.
@ -37,7 +37,7 @@ AC_DEFUN([MCA_ompi_btl_openib_POST_CONFIG], [
 AC_DEFUN([MCA_ompi_btl_openib_CONFIG],[
    AC_CONFIG_FILES([ompi/mca/btl/openib/Makefile])

-    OPAL_VAR_SCOPE_PUSH([cpcs have_threads])
+    OPAL_VAR_SCOPE_PUSH([cpcs have_threads LDFLAGS_save LIBS_save])
    cpcs="oob"

    OMPI_CHECK_OPENFABRICS([btl_openib],
--- a/opal/mca/event/libevent2021/configure.m4
+++ b/opal/mca/event/libevent2021/configure.m4
@ -82,6 +82,8 @@ EOF
 #                              [action-if-cant-compile])
 # ------------------------------------------------
 AC_DEFUN([MCA_opal_event_libevent2021_CONFIG],[
+    OPAL_VAR_SCOPE_PUSH([CFLAGS_save CPPFLAGS_save file event_args libevent_happy])
+
    AC_CONFIG_FILES([opal/mca/event/libevent2021/Makefile])
    basedir="opal/mca/event/libevent2021"

@ -178,5 +180,6 @@ AC_DEFUN([MCA_opal_event_libevent2021_CONFIG],[
           $1],
          [$2
           OPAL_HAVE_WORKING_EVENTOPS=0])
-    unset file
+
+    OPAL_VAR_SCOPE_POP
 ])
--- a/opal/mca/hwloc/hwloc172/configure.m4
+++ b/opal/mca/hwloc/hwloc172/configure.m4
@ -67,7 +67,7 @@ AC_DEFUN([MCA_opal_hwloc_hwloc172_CONFIG],[

    AC_CONFIG_FILES([opal/mca/hwloc/hwloc172/Makefile])

-    OPAL_VAR_SCOPE_PUSH([HWLOC_VERSION opal_hwloc_hwloc172_save_CPPFLAGS opal_hwloc_hwloc172_save_LDFLAGS opal_hwloc_hwloc172_save_LIBS opal_hwloc_hwloc172_save_cairo opal_hwloc_hwloc172_save_xml opal_hwloc_hwloc172_basedir opal_hwloc_hwloc172_file opal_hwloc_hwloc172_save_cflags])
+    OPAL_VAR_SCOPE_PUSH([HWLOC_VERSION opal_hwloc_hwloc172_save_CPPFLAGS opal_hwloc_hwloc172_save_LDFLAGS opal_hwloc_hwloc172_save_LIBS opal_hwloc_hwloc172_save_cairo opal_hwloc_hwloc172_save_xml opal_hwloc_hwloc172_basedir opal_hwloc_hwloc172_file opal_hwloc_hwloc172_save_cflags CPPFLAGS_save])

    # default to this component not providing support
    opal_hwloc_hwloc172_basedir=opal/mca/hwloc/hwloc172