Anticipating a Reply wrote: > In the man page of "dlopen" , > I came across the gcc compilation > command :- > > gcc -rdynamic -o foo foo.c -ldl > > But unfortunately , I found that > the options are undocumented .i.e. > " -rdynamic " & " -ldl " could not > be traced in info & man gcc. As to -rdynamic: GCC does quite a lot of option translation/substitution using its "spec" file. If you type "gcc -v", you will see something like: Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.2/specs That file is a regular ASCII file that you can open with any viewer Alternatively, you can have GCC dump the spec file at you itself using "gcc -dumpspecs". The format isn't *too* cryptic. When you search for -rdynamic in those specs, you will see that GCC translates that option into the "-export-dynamic" option to the linker. "man ld" will now give you all the info. As to -ldl: That "option" most certainly *is* documented in "man gcc" === -llibrary -l library Search the library named library when linking. (The second alternative with the library as a separate argument is only for POSIX compliance and is not recommended.) === That is, you are requesting that gcc link in the "dl" library (/lib/libdl.so.2). "man dlopen" for the documentation on the functions in that library. Rene. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
