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Implement ref-counting for implicitly loaded dependency modules.
(Initial patch by Juan Manuel Guerrero, revised further by Ozkan Sezer.)

Implement ref-counting for implicitly loaded dependency modules.
(Initial patch by Juan Manuel Guerrero, revised further by Ozkan Sezer.)

White space changes.

White space changes.

dlopen.c (dlopen): make sure filename is not NULL and not empty.

dlopen.c (dlopen): make sure filename is not NULL and not empty.

dlopen.c (dlopen): restore stk_top upon failed dependency loading.

dlopen.c (dlopen): restore stk_top upon failed dependency loading.

fix compilation after the previous whitespace changes commit

fix compilation after the previous whitespace changes commit

White space changes.

White space changes.

Update copyright lines of recently modified files

dlopen: fix possible memory overrun when looking up DXE file

Update DXE look-up

Use 2 evnironment variables:
- LD_LIBRARY_PATH - for user to override
- SYSTEM_DXE_PATH - to define DJGPP own DXE search directories
Currently LD_LIBRARY_PATH is defined to have the same value as earlier
for compatbility with old builds of DJGPP software

Directories provided in LD_LIBRARY_PATH are searched before ones
specified in SYSTEM_DXE_PATH

Rename dlsymresolver to _dlsymresolver.

Updates from Daniel Borca

Add new dlopen() functionality and DXE3 support