Re: ovmf build fail with gcc 4.8.5

Chen, Farrah
 

Thanks, we use the latest commit and it works well now.


Thanks,
Fan

-----Original Message-----
From: Laszlo Ersek [mailto:lersek@...]
Sent: Tuesday, August 13, 2019 8:23 PM
To: devel@edk2.groups.io; Chen, Farrah <farrah.chen@...>
Cc: Hao, Xudong <xudong.hao@...>
Subject: Re: [edk2-devel] ovmf build fail with gcc 4.8.5

On 08/13/19 03:13, Chen, Farrah wrote:
Hi,

When build ovmf with the latest two commits of master branch, we meet error on Red Hat 7.6 with gcc version 4.8.5, but succeed on Red Hat 8.0 with gcc version 8.2.1.

Steps:
git clone https://github.com/tianocore/edk2.git
cd edk2
git submodule init
git submodule update -recursive
OvmfPkg/build.sh -a X64 -n 64

Error log:
.......
/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5e7-5e7bcdcf/edk2/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c:641:50: error: 'PageMapLevel5Entry' may be used uninitialized in this function [-Werror=maybe-uninitialized]
PAGE_MAP_AND_DIRECTORY_POINTER *PageMapLevel5Entry;
^
cc1: all warnings being treated as errors "objcopy"
/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5e
7-5e7bcdcf/edk2/Build/OvmfX64/DEBUG_GCC48/X64/MdeModulePkg/Bus/Pci/Pci
HostBridgeDxe/PciHostBridgeDxe/DEBUG/PciHostBridgeDxe.dll
"GenFw" -e UEFI_DRIVER -o
/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5e
7-5e7bcdcf/edk2/Build/OvmfX64/DEBUG_GCC48/X64/OvmfPkg/XenBusDxe/XenBus
Dxe/OUTPUT/XenBusDxe.efi
/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5e
7-5e7bcdcf/edk2/Build/OvmfX64/DEBUG_GCC48/X64/OvmfPkg/XenBusDxe/XenBus
Dxe/DEBUG/XenBusDxe.dll
make: ***
[/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5
e7-5e7bcdcf/edk2/Build/OvmfX64/DEBUG_GCC48/X64/MdeModulePkg/Core/DxeIp
lPeim/DxeIpl/OUTPUT/X64/VirtualMemory.obj] Error 1 cp -f
/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5e
7-5e7bcdcf/edk2/Build/OvmfX64/DEBUG_GCC48/X64/OvmfPkg/XenBusDxe/XenBus
Dxe/OUTPUT/XenBusDxe.efi
/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5e
7-5e7bcdcf/edk2/Build/OvmfX64/DEBUG_GCC48/X64/OvmfPkg/XenBusDxe/XenBus
Dxe/DEBUG


build.py...
: error 7000: Failed to execute command
make tbuild
[/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5
e7-5e7bcdcf/edk2/Build/OvmfX64/DEBUG_GCC48/X64/MdeModulePkg/Core/DxeIp
lPeim/DxeIpl]




build.py...
: error F002: Failed to build module

/home/build/kvm_build/nightly/kvm_qemu/kvm-next-20190813010558-a738b5e
7-5e7bcdcf/edk2/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf [X64, GCC48,
DEBUG]

- Failed -
Build end time: 08:46:33, Aug.13 2019
Build total time: 00:01:15

GCC:
gcc --version
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36) Copyright (C) 2015 Free
Software Foundation, Inc.
This is free software; see the source for copying conditions. There
is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This bug was introduced in commit b3527dedc395 ("MdeModulePkg/DxeIpl:
Create 5-level page table for long mode", 2019-08-09).

It's being addressed in the following (pending) patch:

[edk2-devel] [PATCH 1/1] MdeModulePkg/DxeIplPeim: Relocate the operation of PageMapLevel5Entry++

(I'm calling the issue a bug and not an invalid compiler warning because the patch looks like an actual fix.)

Thanks
Laszlo

Join devel@edk2.groups.io to automatically receive all group messages.