442ef32ee5
Recent versions of ld complain when linking the s390-ccw bios:
/usr/bin/ld: warning: start.o: missing .note.GNU-stack section implies
executable stack
/usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in
a future version of the linker
We can silence the warning by telling the linker to mark the stack
as not executable.
Message-Id: <20230622130822.396793-1-thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
89 lines
2.7 KiB
Makefile
89 lines
2.7 KiB
Makefile
all: build-all
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# Dummy command so that make thinks it has done something
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@true
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include config-host.mak
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CFLAGS = -O2 -g
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MAKEFLAGS += -rR
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GIT_SUBMODULES = roms/SLOF
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NULL :=
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SPACE := $(NULL) #
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TARGET_PREFIX := $(patsubst %/,%:$(SPACE),$(TARGET_DIR))
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quiet-@ = $(if $(V),,@$(if $1,printf "%s\n" "$(TARGET_PREFIX)$1" && ))
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quiet-command = $(call quiet-@,$2 $@)$1
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VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.sh %.rc Kconfig% %.json.in
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set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
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$(call set-vpath, $(SRC_PATH))
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# Flags for dependency generation
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QEMU_DGFLAGS = -MMD -MP -MT $@ -MF $(@D)/$(*F).d
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%.o: %.c
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$(call quiet-command,$(CC) $(EXTRA_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) \
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-c -o $@ $<,Compiling)
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%.o: %.S
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$(call quiet-command,$(CCAS) $(EXTRA_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) \
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-c -o $@ $<,Assembling)
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.PHONY : all clean build-all distclean
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OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \
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virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o dasd-ipl.o
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EXTRA_CFLAGS += -Wall
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EXTRA_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -fno-common -fPIE
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EXTRA_CFLAGS += -fwrapv -fno-strict-aliasing -fno-asynchronous-unwind-tables
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EXTRA_CFLAGS += -msoft-float
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EXTRA_CFLAGS += -std=gnu99
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LDFLAGS += -Wl,-pie -nostdlib
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cc-test = $(CC) -Werror $1 -c -o /dev/null -xc /dev/null >/dev/null 2>/dev/null
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cc-option = if $(call cc-test, $1); then \
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echo "$(TARGET_PREFIX)$1 detected" && echo "EXTRA_CFLAGS += $1" >&3; else \
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echo "$(TARGET_PREFIX)$1 not detected" $(if $2,&& echo "EXTRA_CFLAGS += $2" >&3); fi
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config-cc.mak: Makefile
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$(quiet-@)($(call cc-option,-Wno-stringop-overflow); \
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$(call cc-option,-fno-stack-protector); \
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$(call cc-option,-Wno-array-bounds); \
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$(call cc-option,-Wno-gnu); \
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$(call cc-option,-march=z900,-march=z10)) 3> config-cc.mak
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-include config-cc.mak
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LDFLAGS += -Wl,-pie -nostdlib -z noexecstack
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build-all: s390-ccw.img s390-netboot.img
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s390-ccw.elf: $(OBJECTS)
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$(call quiet-command,$(CC) $(LDFLAGS) -o $@ $(OBJECTS),Linking)
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s390-ccw.img: s390-ccw.elf
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$(call quiet-command,$(STRIP) --strip-unneeded $< -o $@,Stripping $< into)
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$(OBJECTS): Makefile
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include $(SRC_PATH)/netboot.mak
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ALL_OBJS = $(sort $(OBJECTS) $(NETOBJS) $(LIBCOBJS) $(LIBNETOBJS))
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-include $(ALL_OBJS:%.o=%.d)
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clean:
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rm -f *.o *.d *.img *.elf *~ *.a
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distclean:
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rm -f config-cc.mak
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.PHONY: git-submodule-update
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$(SRC_PATH)/../../.git-submodule-status: git-submodule-update config-host.mak
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Makefile: $(SRC_PATH)/../../.git-submodule-status
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git-submodule-update:
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ifneq ($(GIT_SUBMODULES_ACTION),ignore)
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$(quiet-@)GIT=git "$(SRC_PATH)/../../scripts/git-submodule.sh" $(GIT_SUBMODULES_ACTION) $(GIT_SUBMODULES)
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endif
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