[CMake] CMake - overriding shared linker flags

[K Lakshman]

Hi,

I'm trying to build a shared library (gcc on Linux CentOS) with -pie flag. If I 
simply add the flag -pie to CMAKE_SHARED_LINKER_FLAGS "-Wl,-pie", the command 
that gets invoked looks like this:
gcc -shared -Wl,-pie <rest of the command> -o libmylibrary.so

A shared library built like this is not runnable stand-alone (I get an error 
/usr/lib/libc.so: bad ELF interpreter: No such file or directory). Where as if I 
can get the shared library to be built using this command:
gcc -Wl,-shared -Wl,-pie <rest of the command> -o libmylibrary.so

then that shared library seems to run fine stand alone. (The only difference 
betweent the two commands is that the -shared flags is passed to gcc in the 
first version and directly to the linker in the second version thus bypassing 
collect2).

How do I change the shared library build command to use -Wl,-shared instead of 
-shared? Do I have to write a complete custom command or can I use some tricks 
to simply change this part alone?


Thanks,

Lakshman.