aboutsummaryrefslogtreecommitdiff
path: root/pc-bios/optionrom
diff options
context:
space:
mode:
Diffstat (limited to 'pc-bios/optionrom')
-rw-r--r--pc-bios/optionrom/Makefile37
1 files changed, 25 insertions, 12 deletions
diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile
index 3e06c11dea..f514e4f84b 100644
--- a/pc-bios/optionrom/Makefile
+++ b/pc-bios/optionrom/Makefile
@@ -8,23 +8,33 @@ all: multiboot.bin multiboot_dma.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bi
CFLAGS = -O2 -g
-quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1))
-cc-option = $(if $(shell $(CC) $1 -c -o /dev/null -xc /dev/null >/dev/null 2>&1 && echo OK), $1, $2)
-
-override CFLAGS += -march=i486 -Wall $(EXTRA_CFLAGS) -m16
+NULL :=
+SPACE := $(NULL) #
+TARGET_PREFIX := $(patsubst %/,%:$(SPACE),$(TARGET_DIR))
-# If -fcf-protection is enabled in flags or compiler defaults that will
-# conflict with -march=i486
-override CFLAGS += $(call cc-option, -fcf-protection=none)
+quiet-@ = $(if $(V),,@)
+quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1))
# Flags for dependency generation
override CPPFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
-override CFLAGS += $(call cc-option, -fno-pie)
-override CFLAGS += $(call cc-option, -no-pie)
+override CFLAGS += -march=i486 -Wall $(EXTRA_CFLAGS) -m16
override CFLAGS += -ffreestanding -I$(TOPSRC_DIR)/include
-override CFLAGS += $(call cc-option, -fno-stack-protector)
-override CFLAGS += $(call cc-option, -Wno-array-bounds)
+
+cc-test = $(CC) -Werror $1 -c -o /dev/null -xc /dev/null >/dev/null 2>/dev/null
+cc-option = if $(call cc-test, $1); then \
+ echo "$(TARGET_PREFIX)$1 detected" && echo "override CFLAGS += $1" >&3; else \
+ echo "$(TARGET_PREFIX)$1 not detected" $(if $2,&& echo "override CFLAGS += $2" >&3); fi
+
+# If -fcf-protection is enabled in flags or compiler defaults that will
+# conflict with -march=i486
+config-cc.mak: Makefile
+ $(quiet-@)($(call cc-option,-fcf-protection=none); \
+ $(call cc-option,-fno-pie); \
+ $(call cc-option,-no-pie); \
+ $(call cc-option,-fno-stack-protector); \
+ $(call cc-option,-Wno-array-bounds)) 3> config-cc.mak
+-include config-cc.mak
override LDFLAGS = -nostdlib -Wl,-T,$(SRC_DIR)/flat.lds
@@ -50,7 +60,10 @@ include $(wildcard *.d)
clean:
rm -f *.o *.d *.raw *.img *.bin *~
+distclean:
+ rm -f config-cc.mak
+
# suppress auto-removal of intermediate files
.SECONDARY:
-.PHONY: all clean
+.PHONY: all clean distclean