On 03/25/20 10:12, Ard Biesheuvel wrote: > GCC 4.8 or 4.9 may throw the following error when building OVMF: > > Edk2/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c: > In function ‘QemuLoadKernelImage’: > Edk2/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c:416:30: > error: ‘CommandLine’ may be used uninitialized in this function > [-Werror=maybe-uninitialized] > UnicodeSPrintAsciiFormat ( > cc1: all warnings being treated as errors > > This is due to the fact that older GCCs fail to infer that CommandLine is > never actually used unless it has been assigned. So add a redundant NULL > assignment to help these older GCCs understand this. > > Link: https://bugzilla.tianocore.org/show_bug.cgi?id=2630 > Fixes: 7c47d89003a6f ("OvmfPkg: implement QEMU loader library for X86 with > ...") > Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org> > --- > OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c > b/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c > index c5bd6862b265..52b14a4462d8 100644 > --- a/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c > +++ b/OvmfPkg/Library/X86QemuLoadImageLib/X86QemuLoadImageLib.c > @@ -291,6 +291,11 @@ QemuLoadKernelImage ( > CHAR8 *CommandLine; > UINTN InitrdSize; > > + // > + // Redundant assignment to work around GCC48/GCC49 limitations. > + // > + CommandLine = NULL; > + > // > // Load the image. This should call back into the QEMU EFI loader file > system. > // >
Reviewed-by: Laszlo Ersek <ler...@redhat.com> Thanks, Laszlo -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#56337): https://edk2.groups.io/g/devel/message/56337 Mute This Topic: https://groups.io/mt/72537049/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
