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. // -- 2.17.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#56260): https://edk2.groups.io/g/devel/message/56260 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] -=-=-=-=-=-=-=-=-=-=-=-