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Re: [Mingw-users] undefined reference to _imp__*




Hi Eli,

I'm fairly sure it's finding the import library.  I was seeing different errors earlier when it could not find the library.

I tried adding the -v link switch, as you suggested, but I don't see anything in the output that tells me if it's actually reading the import library.

For what it's worth, I using the Eclipse(Mars version) IDE to build the code using the MinGW Fortran compiler and linker.



-----Original Message-----
From: Eli Zaretskii [mailto:eliz@xxxxxxx] 
Sent: Wednesday, January 18, 2017 10:21 AM
To: Cervinka, Mitch <mitch.cervinka@xxxxxxx>
Cc: mingw-users@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [Mingw-users] undefined reference to _imp__*

> From: "Cervinka, Mitch" <mitch.cervinka@xxxxxxx>
> CC: "mingw-users@xxxxxxxxxxxxxxxxxxxxx" 
> <mingw-users@xxxxxxxxxxxxxxxxxxxxx>
> Date: Tue, 17 Jan 2017 22:25:35 +0000
> 
> Okay.  Yes, I'm seeing the imp prefixes in the lib file.
> However, the underscores are wrong.
> 
> If I build the import library with DLLTOOL using the --no-leading-underscore option, and then use "nm -A" to examine the file, I see names like ...
> 
>           __imp_SYMBOL1            (i.e. 2 underscores before imp and 1 before the name)
> 
> If I build it without that option, the names look like this ...
> 
>           __imp__SYMBOL1            (i.e. 2 underscores before imp and 2 before the name)
> 
> However, the linker is looking for names like ...
> 
>           _imp__SYMBOL1            (i.e. 1 underscore before imp and two before the name)

No, the linker should look for __imp__SYMBOL1.  That's what I see in the MinGW import libraries, which definitely work.  Are you sure the linker scans your import library?  Adding -v to the link command line should show that.

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