Re: Building OvmfPkgX64.dsc with XCODE5 (Apple clang 12.0.5) fails in VmgExitLib

["Brijesh Singh" <brijesh.singh@amd.com>]

On 12/13/21 11:48 AM, Rebecca Cran wrote:
> I tried building OvmfPkg/OvmfPkgX64.dsc with XCODE5 (with Apple Clang 
> 12.0.5 from XCode 13.1) and it failed with the following error:
> 
> 
> /Users/bcran/src/uefi/edk2/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c:1875:9: 
> error: variable 'Compacted' is used uninitialized whenever 'if' 
> condition is false [-Werror,-Wsometimes-uninitialized]
>      if (EcxIn == 1) {
>          ^~~~~~~~~~
> /Users/bcran/src/uefi/edk2/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c:1895:12: 
> note: uninitialized use occurs here
>             Compacted
>             ^~~~~~~~~
> /Users/bcran/src/uefi/edk2/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c:1875:5: 
> note: remove the 'if' if its condition is always true
>      if (EcxIn == 1) {
>      ^~~~~~~~~~~~~~~~
> /Users/bcran/src/uefi/edk2/OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c:1871:37: 
> note: initialize the variable 'Compacted' to silence this warning
>      BOOLEAN                Compacted;
>                                      ^
>                                       = '\0'
> 

Thanks for reporting, I will submit a patch sooner to resolve this warning.

-Brijesh