dynamic library building and loading

[Andrei Alexandrescu]

Haven't done any dynamic linking with D and I need to. I'm using dmd 
2.058/Linux at work to build and use dynamic libraries. Here's my attempt:

*** Makefile
all: main lib.so

main: main.d
	dmd main

lib.so: lib.d
	dmd -fPIC -shared lib.d -of./lib.so

*** lib.d
extern(C) int fun(string s)
{
     return 42;
}

*** main.d
import std.stdio;
void main()
{
}

Running make prints:

dmd -fPIC -shared lib.d -of./lib.so
/usr/bin/ld: 
/mnt/vol/engshare/third-party/centos5.2-native/dmd/dmd-2.058-centos5.2-native/bin/../../../../centos5.2-native/phobos/phobos-2.058/ffad884/generated/linux/release/64/libphobos2.a(minfo.o): 
relocation R_X86_64_32 against `a local symbol' can not be used when 
making a shared object; recompile with -fPIC
/mnt/vol/engshare/third-party/centos5.2-native/dmd/dmd-2.058-centos5.2-native/bin/../../../../centos5.2-native/phobos/phobos-2.058/ffad884/generated/linux/release/64/libphobos2.a: 
could not read symbols: Bad value
collect2: ld returned 1 exit status

What steps do I need to take to get off the ground?


Thanks,

Andrei