I've discovered a difference in behavior between GCC48 and VS2012x86
toolchains: Calling gBS->OpenProtocol(... &gEfiHiiPackageListProtocolGuid
...) works when built with VS2012x86 but returns Unsupported with GCC48.
A project that replicates the problem (built against the latest UDK2014.SP1
branch) can be downloaded from http://bluestop.org/PackageListGccBugDemo.zip
. It's a modified copy of MdeModulePkg/Universal/HiiResourcesSampleDxe .
Build it on Windows (I use Windows 8.1 Update) with:
build -p PackageListGccBugDemoPkg/PackageListGccBugDemoPkg.dsc -a X64 -t
VS2012x86
And on Linux (I use OpenSUSE 13.2) with:
build -p PackageListGccBugDemoPkg/PackageListGccBugDemoPkg.dsc -a X64 -t
GCC48
I've seen the problem under Qemu with OVMF built from the latest
UDK2014.SP1 sources, and on a Minnowboard MAX board with 0.78 firmware.
--
Bruce
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