NT DLL to Solaris Shared Library; C++ Exceptions

Question

I have written a "plugin" DLL for a third party product that runs on NT. In my plugin I use C++ exception handling and it works wonderfully :-)
I am now trying to port my plugin so that it will work with the same third party product, but this time running on Solaris.
I knew I was going to have to port my DLL to Solaris and so made sure I did not use any Win32 specific anything. My code compiles & links fine on Solaris. For the most part it even works correctly.
The problem I have is that my code is not catching any of the exceptions it is throwing.
Section 5.14 of the C++ Programming Guide says that for exception handling to work in a shared library, it must be loaded with the RTLD_GLOBAL flag passed to the dlopen() function used to load the shared library.
Of course since the dlopen() function is in a third party product I have no way of knowing whether this parameter is being passed to the dlopen() function or not .. and more importantly I have no way of forcing it to be so.
So ultimately I guess the question for the more experienced shared library writers is .. do you just not use C++ exception mechanism because you can not force your shared library to be opened with the proper parameter to dlopen() .. or is there something else I can do to enable C++ exceptions in my shared library.

Answer 1

All works fine!...
$ mkdir /tmp/xxx
$ cat > dllfile.c
$ cat > dlluser.c
$ gcc -fPIC -c dllfile.c
$ gcc -shared -W1,-soname,libdllfile.so.1 -o libdllfile.so dllfile.o
$ gcc -o prog dlluser.c -ldl
$ ls -l
total 56
-rw-r--r-- 1 xxxxxx users 80 Апр 8 17:04 dllfile.c
-rw-r--r-- 1 xxxxxx users 908 Апр 8 17:15 dllfile.o
-rw-r--r-- 1 xxxxxx users 368 Апр 8 17:03 dlluser.c
-rwxr-xr-x 1 xxxxxx users 5260 Апр 8 17:15 libdllfile.so
-rwxr-xr-x 1 xxxxxx users 6412 Апр 8 17:16 prog
$
$ file *
dllfile.c:     c program text
dllfile.o:     ELF 32-bit MSB relocatable SPARC Version 1
dlluser.c:     c program text
libdllfile.so:     ELF 32-bit MSB dynamic lib SPARC Version 1, dynamically linked, not stripped
prog:          ELF 32-bit MSB executable SPARC Version 1, dynamically linked, not stripped
$
$ su
Password:
# mkdir -p /root/shared_library/
# cp libdllfile.so /root/shared_library/
# exit
$ ./prog
With the changes
library loaded
Inside function
$