• Joshua Hodkinson (8/8) May 02 2019 Hi everyone,
• Mike Parker (7/15) May 02 2019 By default, DMD uses the Optlink linker and some quite old system
• Dennis (8/12) May 03 2019 I don't know if it's specific to me, but with dmd and mscoff I

Joshua Hodkinson <joshua.hodkinson.42 gmail.com> writes:

Hi everyone,

I am getting a linker error when compiling with dmd (v2.085.1) 
when using StrechDIBits from the win32 api.

Error 42: Symbol Undefined _StretchDIBits 52

However with ldc (v1.15.0) the program compiles correctly.

Wondering if I've missed something here, or possibly identified a 
bug with dmd?

Thanks

Mike Parker <aldacron gmail.com> writes:

On Thursday, 2 May 2019 at 22:54:20 UTC, Joshua Hodkinson wrote:
 Hi everyone,

 I am getting a linker error when compiling with dmd (v2.085.1) 
 when using StrechDIBits from the win32 api.

 Error 42: Symbol Undefined _StretchDIBits 52

 However with ldc (v1.15.0) the program compiles correctly.

 Wondering if I've missed something here, or possibly identified 
 a bug with dmd?

 Thanks

By default, DMD uses the Optlink linker and some quite old system 
import libraries in the OMF format. They’re missing a number of 
functions. If you compile with -m32mscoff for 32-bit or -m64, DMD 
will use the Microsoft linker and import libraries if you have 
Visual Studio or the MS Build tools installed, and the LDC linker 
with some import libraries from MinGW if you don’t.

Dennis <dkorpel gmail.com> writes:

On Friday, 3 May 2019 at 06:20:37 UTC, Mike Parker wrote:
 If you compile with -m32mscoff for 32-bit or -m64, DMD will use 
 the Microsoft linker and import libraries if you have Visual 
 Studio or the MS Build tools installed, and the LDC linker with 
 some import libraries from MinGW if you don’t.

I don't know if it's specific to me, but with dmd and mscoff I 
found the need to explicitly mention that I wanted to use the 
import libraries.

E.g. looking at the requirements section of the docs:
(https://docs.microsoft.com/en-us/windows/desktop/api/wingdi/nf-wingdi-stretchdibits)

I would put this in my code:
pragma(lib, "Gdi32.lib");