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digitalmars.D.learn - Compiling a shared library

reply Mandeep Singh Brar <mandeep brars.co.in> writes:
Hi,

I read on this website that it is possible to create shared libraries on linux
using dmd. Is that
correct?
I am trying to compile the following code:

module testPlugin;
import std.stdio;

export class testPlugin {
	export void testMethod() {
		writeln("This is method from plugin");
	}
}

using the command
dmd -fPIC testPlugin.d -oflibtestplugin.so -L-shared

The system gives me the error

//usr/lib/libc_nonshared.a(elf-init.oS): relocation R_386_GOTOFF against
undefined hidden symbol
`__init_array_end' can not be used when making a shared object
/usr/bin/ld: final link failed: Bad value

I tried to compile the file first with -c and then create a shared object but
again it gives the same
message.

Can you please let me know if i am doing something wrong here or is it even
possible to create a linux
shared library using dmd.

Regards
Mandeep
Jan 14 2011
next sibling parent Jonathan M Davis <jmdavisProg gmx.com> writes:
On Friday 14 January 2011 00:49:12 Mandeep Singh Brar wrote:
 Hi,
 
 I read on this website that it is possible to create shared libraries on
 linux using dmd. Is that correct?
 I am trying to compile the following code:
 
 module testPlugin;
 import std.stdio;
 
 export class testPlugin {
 	export void testMethod() {
 		writeln("This is method from plugin");
 	}
 }
 
 using the command
 dmd -fPIC testPlugin.d -oflibtestplugin.so -L-shared
 
 The system gives me the error
 
 //usr/lib/libc_nonshared.a(elf-init.oS): relocation R_386_GOTOFF against
 undefined hidden symbol `__init_array_end' can not be used when making a
 shared object
 /usr/bin/ld: final link failed: Bad value
 
 I tried to compile the file first with -c and then create a shared object
 but again it gives the same message.
 
 Can you please let me know if i am doing something wrong here or is it even
 possible to create a linux shared library using dmd.

I'm not sure what the exact state of shared libraries and dmd is at the moment, but as I understand it, it doesn't quite work right now. Getting shared libraries working will be one of the priorities once the 64-bit port of dmd is done, but until then, I don't believe that you can do it. - Jonathan M Davis
Jan 14 2011
prev sibling parent Jacob Carlborg <doob me.com> writes:
On 2011-01-14 09:49, Mandeep Singh Brar wrote:
 Hi,

 I read on this website that it is possible to create shared libraries on linux
using dmd. Is that
 correct?
 I am trying to compile the following code:

 module testPlugin;
 import std.stdio;

 export class testPlugin {
 	export void testMethod() {
 		writeln("This is method from plugin");
 	}
 }

 using the command
 dmd -fPIC testPlugin.d -oflibtestplugin.so -L-shared

 The system gives me the error

 //usr/lib/libc_nonshared.a(elf-init.oS): relocation R_386_GOTOFF against
undefined hidden symbol
 `__init_array_end' can not be used when making a shared object
 /usr/bin/ld: final link failed: Bad value

 I tried to compile the file first with -c and then create a shared object but
again it gives the same
 message.

 Can you please let me know if i am doing something wrong here or is it even
possible to create a linux
 shared library using dmd.

 Regards
 Mandeep

You cannot currently do that with dmd on linux. The runtime doesn't have support for it and the are one or several PIC bugs that have to be fixed first. Issues 3226 and 4583 for example. -- /Jacob Carlborg
Jan 14 2011