From: Christian Ehrhardt <christian.ehrha...@canonical.com> Some of the roms build with -march=i486 -m16 which is incompatible with -fcf-protection. That in turn is can be set by default, for example in Ubuntu [1]. That causes: cc1: error: ‘-fcf-protection’ is not compatible with this target
This won't work on -march=i486 -m16 and no matter if set or not we can override it to "none" if the option is known to the compiler to be able to build reliably. Fixes: https://gitlab.com/qemu-project/qemu/-/issues/889 [1]: https://wiki.ubuntu.com/ToolChain/CompilerFlags#A-fcf-protection Signed-off-by: Christian Ehrhardt <christian.ehrha...@canonical.com> --- pc-bios/optionrom/Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile index 5d55d25acc..f1ef898073 100644 --- a/pc-bios/optionrom/Makefile +++ b/pc-bios/optionrom/Makefile @@ -14,6 +14,10 @@ cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 override CFLAGS += -march=i486 -Wall +# If -fcf-protection is enabled in flags or compiler defaults that will +# conflict with -march=i486 +override CFLAGS += $(call cc-option, -fcf-protection=none) + # Flags for dependency generation override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d -- 2.35.1
