If this global variable is used by code, it will be linked into the final EFI
image. You can check whether the generate map file includes it.
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Tiger
> Liu(BJ-RD)
> Sent: Tuesday, August 4, 2020 5:34 PM
> To: devel@edk2.groups.io
> Subject: [edk2-devel] question about MSFT compiler/link option
>
> Hi, Experts:
> I have a question about MSFT compiler/link option.
>
> I wrote a PEIM, which had a large global data array definition in a C file.
> Such as:
> PRI_DATA_STRUCT PdataStructTable[] = {
> {01, 0x75, 0xF0, 0x0, 0x0, 0x0 },
> {02, 0x77, 0xF0, 0x0, 0x0, 0x0 },
> {03, 0x79, 0xF0, 0x0, 0x0, 0x0 },
> {04, 0x7B, 0xF0, 0x0, 0x0, 0x0 },
> {05, 0x7D, 0xF0, 0x0, 0x0, 0x0 },
> {06, 0x7F, 0xF0, 0x0, 0x0, 0x0 },
> ......
> };
>
> This global data array is very large, about 20KB.
>
> But I found the PEIM's compiled size is about 5KB, it seems not include this
> global data array in the efi binary statically.
> Even the release version PEIM's size is larger than debug version.
>
> I found when compiling release version, the link option has :
> /MERGE:.rdata=.data
> It seems release binary included the global data array in the final efi image.
>
> So, my question is:
> Will the global data array be in linked into the final efi binary image when
> compiling debug version?
>
> Thanks
>
>
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