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-rw-r--r--scripts/Makefile.build6
-rw-r--r--scripts/Makefile.clean2
-rw-r--r--scripts/Makefile.userprogs45
3 files changed, 52 insertions, 1 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 9fcbfac15d1d..3665b1a0bc8e 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -50,6 +50,12 @@ ifneq ($(hostprogs)$(hostcxxlibs-y)$(hostcxxlibs-m),)
include scripts/Makefile.host
endif
+# Do not include userprogs rules unless needed.
+userprogs := $(sort $(userprogs))
+ifneq ($(userprogs),)
+include scripts/Makefile.userprogs
+endif
+
ifndef obj
$(warning kbuild: Makefile.build is included improperly)
endif
diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index 075f0cc2d8d7..e2c76122319d 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -29,7 +29,7 @@ subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
__clean-files := $(extra-y) $(extra-m) $(extra-) \
$(always) $(always-y) $(always-m) $(always-) $(targets) $(clean-files) \
- $(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \
+ $(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) $(userprogs) \
$(hostcxxlibs-y) $(hostcxxlibs-m)
__clean-files := $(filter-out $(no-clean-files), $(__clean-files))
diff --git a/scripts/Makefile.userprogs b/scripts/Makefile.userprogs
new file mode 100644
index 000000000000..fb415297337a
--- /dev/null
+++ b/scripts/Makefile.userprogs
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Build userspace programs for the target system
+#
+
+# Executables compiled from a single .c file
+user-csingle := $(foreach m, $(userprogs), $(if $($(m)-objs),,$(m)))
+
+# Executables linked based on several .o files
+user-cmulti := $(foreach m, $(userprogs), $(if $($(m)-objs),$(m)))
+
+# Objects compiled from .c files
+user-cobjs := $(sort $(foreach m, $(userprogs), $($(m)-objs)))
+
+user-csingle := $(addprefix $(obj)/, $(user-csingle))
+user-cmulti := $(addprefix $(obj)/, $(user-cmulti))
+user-cobjs := $(addprefix $(obj)/, $(user-cobjs))
+
+user_ccflags = -Wp,-MMD,$(depfile) $(KBUILD_USERCFLAGS) $(userccflags) \
+ $($(target-stem)-userccflags)
+user_ldflags = $(KBUILD_USERLDFLAGS) $(userldflags) $($(target-stem)-userldflags)
+
+# Create an executable from a single .c file
+quiet_cmd_user_cc_c = CC [U] $@
+ cmd_user_cc_c = $(CC) $(user_ccflags) $(user_ldflags) -o $@ $< \
+ $($(target-stem)-userldlibs)
+$(user-csingle): $(obj)/%: $(src)/%.c FORCE
+ $(call if_changed_dep,user_cc_c)
+
+# Link an executable based on list of .o files
+quiet_cmd_user_ld = LD [U] $@
+ cmd_user_ld = $(CC) $(user_ldflags) -o $@ \
+ $(addprefix $(obj)/, $($(target-stem)-objs)) \
+ $($(target-stem)-userldlibs)
+$(user-cmulti): FORCE
+ $(call if_changed,user_ld)
+$(call multi_depend, $(user-cmulti), , -objs)
+
+# Create .o file from a .c file
+quiet_cmd_user_cc_o_c = CC [U] $@
+ cmd_user_cc_o_c = $(CC) $(user_ccflags) -c -o $@ $<
+$(user-cobjs): $(obj)/%.o: $(src)/%.c FORCE
+ $(call if_changed_dep,user_cc_o_c)
+
+targets += $(user-csingle) $(user-cmulti) $(user-cobjs)