Subject: [PATCH] build: fix build failure with gcc 11.2 by disabling -fcf-protection Date: Tue, 8 Feb 2022 13:19:37 -0800 [thread overview] Message-ID: <20220208211937.79580-1-vineetg@rivosinc.com> (raw) When doing RV qemu builds with host gcc 11.2, ran into following build failure | cc -MMD -MP -MT linuxboot_dma.o -MF ./linuxboot_dma.d -O2 -g -march=i486 -Wall \ | -Wstrict-prototypes -Wredundant-decls -Wundef -Wwrite-strings -Wmissing-prototypes \ | -Wold-style-declaration -Wold-style-definition -Wtype-limits -Wformat-security \ | -Wformat-y2k -Winit-self -Wignored-qualifiers -Wempty-body -Wnested-externs \ | -Wendif-labels -Wexpansion-to-defined -Wimplicit-fallthrough=2 -Wno-missing-include-dirs \ | -Wno-shift-negative-value -Wno-psabi -fno-pie -ffreestanding -IQEMU/include \ | -fno-stack-protector -m16 -Wa,-32 \ | -c QEMU/pc-bios/optionrom/linuxboot_dma.c -o linuxboot_dma.o |cc1: error: ‘-fcf-protection’ is not compatible with this target Signed-off-by: Vineet Gupta --- This might be a crude fix to the problem --- pc-bios/optionrom/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile index 5d55d25acca2..8f843ee803c1 100644 --- a/pc-bios/optionrom/Makefile +++ b/pc-bios/optionrom/Makefile @@ -22,6 +22,9 @@ override CFLAGS += $(CFLAGS_NOPIE) -ffreestanding -I$(TOPSRC_DIR)/include override CFLAGS += $(call cc-option, -fno-stack-protector) override CFLAGS += $(call cc-option, -m16) +# issue with gcc 11.2 +override CFLAGS += $(call cc-option, -fcf-protection=none) + ifeq ($(filter -m16, $(CFLAGS)),) # Attempt to work around compilers that lack -m16 (GCC <= 4.8, clang <= ??) # On GCC we add -fno-toplevel-reorder to keep the order of asm blocks with