DLL Programmer's Guide for TNS/R Systems

Advanced DLL Facility Controls
DLL Programmer’s Guide for TNS/R Systems—522203-002
5-11
Load-Time Operation
If -verbose or -warn is in effect, then when a linking operation finishes, the linker
puts out a completion message that covers the entire process and indicates how many
of each type of message (error, warn, or information) were generated during the linking
process.
Command Stream Requests for Linker Messages
In addition to the progress-reporting linker messages described above, you can
request informational messages by inserting one of the following options. These are
effective regardless of the message-control option in effect.
-y symbolname tells the linker to show the names of linkfiles that mention
symbolname in their external symbol tables and the information in those tables
about the symbol. -y reports on linkfiles that either reference the symbol or offer it
for use beyond the same compilation.
-show_multiple_defs tells the linker to show information about all multiply defined
symbols. Unlike -y, the linker only provides information about linkfiles that offer the
symbol for use beyond the same compilation, not about those that reference it.
-map tells the linker to report the virtual addresses and sizes of the segments and the
sections, within each segment, of a loadfile being built. Further, the linker shows
the library and file names of all liblisted libraries. -m is a synonym for -map.
Load-Time Operation
To load a program and its DLLs, the system is commanded simply to load the program.
The loader automatically ensures that the program’s entire loadList is loaded and that
all symbols are resolved with proper bindings.
Controlling the Loader’s Search Path at Load Time
Like the linker (ld), the loader (rld) searches for DLLs, but the loader does it according
to rld’s search path, which was initially specified when the loadfile was linked; see The
Link-Time-Defined Search Path of the Loader on page 2-16. To this path, other
directories or subvolumes may be added at load time as follows.
On OSS, you can specify the following environmental variables:
EXPORT _RLD_FIRST_LIB_PATH=path1[:path2]...
EXPORT _RLD_LIB_PATH=path1[:path2]...
where path1, path2, etc. are the paths the loader is to search
On Guardian, you can use the following Search Class Defines, specified according to
the Guardian Programmers Guide.
ADD DEFINE =_RLD_FIRST_LIB_PATH
ADD DEFINE =_RLD_LIB_PATH