Is spawnvp supported on linux? I have no idea what it does, but this is causing me problems (notice that I don't even use spawnvp):

//--------------------------------
import std.process;

void main ()
{
    system("ls");
}
//--------------------------------

$ dmd test.d
gcc test.o -o test -lphobos -lpthread -lm
/usr/lib/gcc-lib/i386-redhat-linux/3.3.3/../../../libphobos.a(process.o)(.gnu.linkonce.t_D3std7process7spawnvpFiAaAAaZi+0x44): En la función `_D3std7process7spawnvpFiAaAAaZi':
: undefined reference to `spawnvp'
collect2: ld devolvió el estado de salida 1
--- errorlevel 1
$

It looks like spawvnp can't be found by ld. This didn't happen with DMD 0.112 (0.111) because it didn't have spawvp.

Using DMD 0.113 on Fedora Core 2, gcc version 3.3.3.

_______________________
Carlos Santander Bernal

On Thu, 17 Feb 2005 17:15:03 -0500, Carlos Santander B. wrote:

> Is spawnvp supported on linux? I have no idea what it does, but this is causing me problems (notice that I don't even use spawnvp):
> 
> //--------------------------------
> import std.process;
> 
> void main ()
> {
>      system("ls");
> }
> //--------------------------------
> 
> $ dmd test.d
> gcc test.o -o test -lphobos -lpthread -lm
> /usr/lib/gcc-lib/i386-redhat-linux/3.3.3/../../../libphobos.a(process.o)(.gnu.linkonce.t_D3std7process7spawnvpFiAaAAaZi+0x44):
> En la función `_D3std7process7spawnvpFiAaAAaZi':
> : undefined reference to `spawnvp'
> collect2: ld devolvió el estado de salida 1
> --- errorlevel 1
> $
> 
> It looks like spawvnp can't be found by ld. This didn't happen with DMD 0.112 (0.111) because it didn't have spawvp.
> 
> Using DMD 0.113 on Fedora Core 2, gcc version 3.3.3.
> 
> _______________________
> Carlos Santander Bernal

spawnvp() doesn't appear to be part of Linux.  There are other calls that
are available: fork() (the old *nix standby) , posix_spawn(), and
posix_spawnp().

This looks like a bug in phobos.

- John R.

Carlos Santander B. schrieb:
> Is spawnvp supported on linux? I have no idea what it does, but this is causing me problems (notice that I don't even use spawnvp):

I'm quite sure it exists.

> /usr/lib/gcc-lib/i386-redhat-linux/3.3.3/../../../libphobos.a(process.o)(.gnu.linkonce.t_D3std7process7spawnvpFiAaAAaZi+0x44): En la función `_D3std7process7spawnvpFiAaAAaZi':
> : undefined reference to `spawnvp'

Do you see the "FiAaAAaZi" after spawnvp? This indicates a C++ name mangling. spawnvp is a C function. libphobos (process.o) seems to use it without an extern "C" for the function declaration - or it's not declared at all. It really looks like a bug in libphobos (process.o).

Regards,
Mark

On Fri, 18 Feb 2005 00:54:48 +0100, Mark Junker wrote:

> Carlos Santander B. schrieb:
>> Is spawnvp supported on linux? I have no idea what it does, but this is causing me problems (notice that I don't even use spawnvp):
> 
> I'm quite sure it exists.

I couldn't find it on my Linux system.  It doesn't appear in spawn.h or any other files or in the 'man' docs.  Were you able to find it?

>> /usr/lib/gcc-lib/i386-redhat-linux/3.3.3/../../../libphobos.a(process.o)(.gnu.linkonce.t_D3std7process7spawnvpFiAaAAaZi+0x44):
>> En la función `_D3std7process7spawnvpFiAaAAaZi':
>> : undefined reference to `spawnvp'
> 
> Do you see the "FiAaAAaZi" after spawnvp? This indicates a C++ name mangling. spawnvp is a C function. libphobos (process.o) seems to use it without an extern "C" for the function declaration - or it's not declared at all. It really looks like a bug in libphobos (process.o).

It's defined in std.c.process, and it's declared extern(C).  I doesn't seem to exist on Linux, so that doesn't help.

- John R.

Mark Junker wrote:
> Carlos Santander B. schrieb:
>> /usr/lib/gcc-lib/i386-redhat-linux/3.3.3/../../../libphobos.a(process.o)(.gnu.linkonce.t_D3std7process7spawnvpFiAaAAaZi+0x44): En la función `_D3std7process7spawnvpFiAaAAaZi':
>> : undefined reference to `spawnvp'
> 
> 
> Do you see the "FiAaAAaZi" after spawnvp? This indicates a C++ name mangling. spawnvp is a C function. libphobos (process.o) seems to use it without an extern "C" for the function declaration - or it's not declared at all. It really looks like a bug in libphobos (process.o).
> 
> Regards,
> Mark

Partially wrong: the "FiAaAAaZi" means D name mangling. What ld is saying that std.process.spawnvp() is looking for spawnvp(), which doesn't exist. That is correct, because std.process.spawnvp() calls std.c.process.spawvp() which is declared (as John said) as extern(C).

_______________________
Carlos Santander Bernal

John Reimer schrieb:

>>I'm quite sure it exists.
> I couldn't find it on my Linux system.  It doesn't appear in spawn.h or
> any other files or in the 'man' docs.  Were you able to find it?

It seems that you're right. According to Borlands documentation, it only exists on Win32 ...

> It's defined in std.c.process, and it's declared extern(C).  I doesn't
> seem to exist on Linux, so that doesn't help.

Ah, now I understand ... sorry ... can it be that std.process.spawnvp() is declared but not defined for Linux? So the compiler should emit an error?

Regards,
Mark