SDK/ROS, or GCC, misses __HrLoadAllImportsForDll() support?

Noticed while working on ROSTESTS-296, following ROSTESTS-293 discussion.

I wanted to give __HrLoadAllImportsForDll() a try, but GCC + ROS gave:
error: implicit declaration of function '__HrLoadAllImportsForDll'

Could it (or similar) be supported, or is it MS VC++ specific?

—

https://docs.microsoft.com/fr-fr/cpp/build/reference/linker-support-for-delay-loaded-dlls

Linker Support for Delay-Loaded DLLs

https://docs.microsoft.com/fr-fr/cpp/build/reference/loading-all-imports-for-a-delay-loaded-dll

The __HrLoadAllImportsForDll function, which is defined in delayhlp.cpp, ...

if (FAILED(__HrLoadAllImportsForDll("delay1.dll"))) {

   printf ( "failed on snap load, exiting\n" );

   exit(2);

}

https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/9mGyojfqCCU

That function is (should be) in DelayImp.h and delayimp.lib.

—

delayimp.h
{{ 20 #define DELAYLOAD_VERSION 0x200}}

delayimp.c

apitests/sdk/delayimp.cpp

 422 #if defined(_DELAY_IMP_VER) && _DELAY_IMP_VER == 2 && defined(DELAYLOAD_SUPPORTS_UNLOADING)

 433         hr = __HrLoadAllImportsForDll(WINMM_DLLNAME);