On 3 August 2016 at 10:58, Gao, Liming <liming....@intel.com> wrote: > Ard: > I see Steven says it doesn't work, yet. So, I am curious what real issue is > resolved by this patch? >
For example, when building ArmVirtQemu for ARM, you may get warnings (or errors when -Werror is enabled) like lto1: warning: switch -mcpu=cortex-a15 conflicts with -march=armv7-a switch where cortex-a15 is the target set by the platform .DSC, and armv7-a is the default target of the compiler. In this particular example, that does not cause any issues, since cortex-a15 is compatible with armv7-a. However, if you are building for ARM11, the code generation performed by the linker will generate incompatible code unless we pass it the -mcpu=arm11 option as well. The same applies to things like -mstrict-alignment and -mcmodel=xxx. I suppose the same issue exists for IA32, where the -march/-mcpu options in the platform may deviate from the compiler's default. -- Ard. _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
