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To: "Gao, Liming" <liming.gao@intel.com>,
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Thu, 2 Aug 2018 20:24:04 +0200
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Subject: Re: Undefined types referenced in MdePkg
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On 08/02/18 15:05, Gao, Liming wrote:
> MdePkg provides the basic module type header file, such as PiPei.h,
> PiDxe.h, Uefi.h. PiPei.h and PiDxe.h will include the basic PI
> definition. They have included PiHob.h and PiFirmwareVolume.h. 
> Because the module type header file is included into AutoGen.h based
> on the module type. And, AutoGen.h is always included by compiler
> option. So, in edk2 build system, there is no issue to include
> HobLib.h and Protocol/FirmwareVolume2.h in source files.

Thanks, this is helpful!
Laszlo