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'
--
Rebecca Cran
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