e81c070ef0
Embedding libltdl without the use of Libtool bootstrapping has proven... difficult. Instead, create a new simple "dl" framework. It only provides 4 functions: - open a DSO (very similar to lt_dlopenadvise()) - lookup a symbol in a previously-opened DSO (very similar to lt_dlsym()) - close a previously-opened DSO (very similar to lt_dlclose()) - iterate over all files in a directory (very similar to ld_dlforeachfile()) There will be follow-on commits with a simple dlopen-based component (nowhere near as complete/functional as libltdl, but good enough for Linux and OS X), and a libltdl-based component for all other platforms. The intent is that the dlopen-based component can be built by default in almost all cases. But if libltdl is available, that component will be built. End result: we still get DSO-based functionality by default in (almost?) all cases. Without embedding libltdl. Which is what we want.
55 строки
1.8 KiB
C
55 строки
1.8 KiB
C
/*
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* Copyright (c) 2004-2010 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2011-2013 Los Alamos National Security, LLC.
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* All rights reserved.
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* Copyright (c) 2015 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "opal_config.h"
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#include "opal/mca/dl/base/base.h"
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#include "opal/mca/dl/base/static-components.h"
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/*
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* Globals
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*/
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opal_dl_base_module_t *opal_dl = NULL;
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opal_dl_base_component_t *opal_dl_base_selected_component = NULL;
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/*
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* Function for finding and opening either all MCA components,
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* or the one that was specifically requested via a MCA parameter.
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*
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* Note that we really don't need this function -- we could specify a
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* NULL pointer in the framework declare and the base would do this
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* exact same thing. However, we need to have at least some
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* executable code in this file, or some linkers (cough cough OS X
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* cough cough) may not actually link in this .o file.
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*/
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int opal_dl_base_open(mca_base_open_flag_t flags)
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{
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/* Open up all available components */
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return mca_base_framework_components_open(&opal_dl_base_framework, flags);
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}
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/* VERY IMPORTANT: This framework is static, and is opened before any
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other dyanmic frameworks are opened (which makes sense, of course).
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But we must mark this framework is NO_DSO so that the MCA framework
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base doesn't try to open any dynamic components in this
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framework. */
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MCA_BASE_FRAMEWORK_DECLARE(opal, dl, "Dynamic loader framework",
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NULL /* register */,
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opal_dl_base_open /* open */,
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NULL /* close */,
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mca_dl_base_static_components,
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MCA_BASE_FRAMEWORK_FLAG_NO_DSO);
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