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5f56cb030e
This syntax is useful to specify libraries linked to all userspace programs in the Makefile. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
45 lines
1.6 KiB
Text
45 lines
1.6 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Build userspace programs for the target system
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#
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# Executables compiled from a single .c file
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user-csingle := $(foreach m, $(userprogs), $(if $($(m)-objs),,$(m)))
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# Executables linked based on several .o files
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user-cmulti := $(foreach m, $(userprogs), $(if $($(m)-objs),$(m)))
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# Objects compiled from .c files
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user-cobjs := $(sort $(foreach m, $(userprogs), $($(m)-objs)))
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user-csingle := $(addprefix $(obj)/, $(user-csingle))
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user-cmulti := $(addprefix $(obj)/, $(user-cmulti))
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user-cobjs := $(addprefix $(obj)/, $(user-cobjs))
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user_ccflags = -Wp,-MMD,$(depfile) $(KBUILD_USERCFLAGS) $(userccflags) \
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$($(target-stem)-userccflags)
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user_ldflags = $(KBUILD_USERLDFLAGS) $(userldflags) $($(target-stem)-userldflags)
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user_ldlibs = $(userldlibs) $($(target-stem)-userldlibs)
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# Create an executable from a single .c file
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quiet_cmd_user_cc_c = CC [U] $@
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cmd_user_cc_c = $(CC) $(user_ccflags) $(user_ldflags) -o $@ $< \
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$(user_ldlibs)
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$(user-csingle): $(obj)/%: $(src)/%.c FORCE
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$(call if_changed_dep,user_cc_c)
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# Link an executable based on list of .o files
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quiet_cmd_user_ld = LD [U] $@
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cmd_user_ld = $(CC) $(user_ldflags) -o $@ \
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$(addprefix $(obj)/, $($(target-stem)-objs)) $(user_ldlibs)
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$(user-cmulti): FORCE
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$(call if_changed,user_ld)
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$(call multi_depend, $(user-cmulti), , -objs)
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# Create .o file from a .c file
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quiet_cmd_user_cc_o_c = CC [U] $@
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cmd_user_cc_o_c = $(CC) $(user_ccflags) -c -o $@ $<
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$(user-cobjs): $(obj)/%.o: $(src)/%.c FORCE
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$(call if_changed_dep,user_cc_o_c)
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targets += $(user-csingle) $(user-cmulti) $(user-cobjs)
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