build: clean up opal_mca / dlopen argument handling

opal_mca.m4 was setting enable_dlopen after it was processed, and
the dlopen argument checking was overriding configure arguments
that belong to opal_mca.  Clean up the late change in enable_dlopen
and handle the --disable-dlopen case in opal_mca instead of
overriding user options.

Signed-off-by: Brian Barrett <bbarrett@amazon.com>

Author: bwbarrett

config/opal_configure_options.m4

@@ -275,8 +275,6 @@ AC_ARG_ENABLE([dlopen],
                      Disabling dlopen implies --disable-mca-dso.
                      (default: enabled)])])
 if test "$enable_dlopen" = "no" ; then
-    enable_mca_dso=no
-    enable_mca_static=yes
     OPAL_ENABLE_DLOPEN_SUPPORT=0
     AC_MSG_RESULT([no])
 else

config/opal_mca.m4

@@ -166,7 +166,7 @@ AC_DEFUN([OPAL_MCA],[
     # resolution (prefer static) is done in the big loop below
     #
     AC_MSG_CHECKING([which components should be run-time loadable])
-    if test "$enable_static" != "no"; then
+    if test "$enable_static" != "no" || test "$OPAL_ENABLE_DLOPEN_SUPPORT" = 0; then
         DSO_all=0
         msg=none
     elif test -z "$enable_mca_dso" || test "$enable_mca_dso" = "yes"; then
@@ -175,7 +175,6 @@ AC_DEFUN([OPAL_MCA],[
     elif test "$enable_mca_dso" = "no"; then
         DSO_all=0
         msg=none
-        enable_dlopen=no
     else
         DSO_all=0
         ifs_save="$IFS"