http://d.puremagic.com/issues/show_bug.cgi?id=1663

           Summary: pragma(lib, "") don't work on linux
           Product: D
           Version: 1.023
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla@digitalmars.com
        ReportedBy: larsivar@igesund.net


pragma (lib, "") doesn't work on linux.

I would expect for instance

pragma (lib, "dl") to make libdl be linked in, aka -ldl

There is nothing in the docs about this not working on Linux. I also think it is a silly feature to have as optional for implementations.


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d-bugmail@puremagic.com wrote:
> http://d.puremagic.com/issues/show_bug.cgi?id=1663
> 
>            Summary: pragma(lib, "") don't work on linux
>            Product: D
>            Version: 1.023
>           Platform: Other
>         OS/Version: Linux
>             Status: NEW
>           Severity: normal
>           Priority: P2
>          Component: DMD
>         AssignedTo: bugzilla@digitalmars.com
>         ReportedBy: larsivar@igesund.net
> 
> 
> pragma (lib, "") doesn't work on linux.
> 
> I would expect for instance
> 
> pragma (lib, "dl") to make libdl be linked in, aka -ldl
> 
> There is nothing in the docs about this not working on Linux. I also think it
> is a silly feature to have as optional for implementations.

dsss implements a pragma(link,...) which does basically that.
It's really what pragma(lib,...) should have been to begin with.

From
http://svn.dsource.org/projects/dsss/trunk/docs/README.software_engineers
"""
The -ll flag is only useful for explicitly linking libraries into binaries. If the DSSS-implemented library depends on a non-DSSS library, the dependency must be specified in a .d file which is part of the DSSS-implemented library. This is done with the 'link' pragma, which must always be specified within version(build):

version (build) {
    pragma(link, "example");
}

The above example will cause any binary linked against the DSSS-implemented library to link against the library named libexample.a (or example.lib on Windows).
"""

Bill Baxter wrote:

> d-bugmail@puremagic.com wrote:
>> http://d.puremagic.com/issues/show_bug.cgi?id=1663
>> 
>>            Summary: pragma(lib, "") don't work on linux
>>            Product: D
>>            Version: 1.023
>>           Platform: Other
>>         OS/Version: Linux
>>             Status: NEW
>>           Severity: normal
>>           Priority: P2
>>          Component: DMD
>>         AssignedTo: bugzilla@digitalmars.com
>>         ReportedBy: larsivar@igesund.net
>> 
>> 
>> pragma (lib, "") doesn't work on linux.
>> 
>> I would expect for instance
>> 
>> pragma (lib, "dl") to make libdl be linked in, aka -ldl
>> 
>> There is nothing in the docs about this not working on Linux. I also think it is a silly feature to have as optional for implementations.
> 
> dsss implements a pragma(link,...) which does basically that.
> It's really what pragma(lib,...) should have been to begin with.
> 
> From
> http://svn.dsource.org/projects/dsss/trunk/docs/README.software_engineers
> """
> The -ll flag is only useful for explicitly linking libraries into
> binaries. If the DSSS-implemented library depends on a non-DSSS library,
> the dependency must be specified in a .d file which is part of the
> DSSS-implemented library. This is done with the 'link' pragma, which
> must always be specified within version(build):
> 
> version (build) {
>      pragma(link, "example");
> }
> 
> The above example will cause any binary linked against the
> DSSS-implemented library to link against the library named libexample.a
> (or example.lib on Windows).
> """

I know, but I'm after a solution that isn't tool dependent (and pragma
(lib, "")) appears to be that solution.

http://d.puremagic.com/issues/show_bug.cgi?id=1663





------- Comment #2 from larsivar@igesund.net  2007-11-24 07:12 -------
See also Issue 1690. GDC has chosen to not implement pragma(lib) at all, at least not yet. This makes it a pretty useless thing to have in the spec. Either make it required, or remove it.


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http://d.puremagic.com/issues/show_bug.cgi?id=1663





------- Comment #3 from unknown@simplemachines.org  2008-04-12 18:39 -------
Created an attachment (id=243)
 --> (http://d.puremagic.com/issues/attachment.cgi?id=243&action=view)
patch to use libfiles, disable pragma statements

This attachment makes two changes that make this pragma work properly:

1. Produces an error when used as a statement.  The Windows compiler does not support this either, and it doesn't make sense anyway.

2. Adds "-lLIBRARY" to global.params.libfiles for each library on Linux.  This way, it will be passed to gcc like any other (since I presume obj_includelib does not work with gcc on Linux.)

I realize #1 isn't exactly this bug, but it is related to the pragma not working (on any OS) while being silently ignored.

-[Unknown]


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http://d.puremagic.com/issues/show_bug.cgi?id=1663


bugzilla@digitalmars.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




------- Comment #4 from bugzilla@digitalmars.com  2008-12-08 00:53 -------
Fixed in DMD 1.037 and 2.021


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