diff options
Diffstat (limited to 'scripts/Makefile.asm-generic')
-rw-r--r-- | scripts/Makefile.asm-generic | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/scripts/Makefile.asm-generic b/scripts/Makefile.asm-generic new file mode 100644 index 000000000..82ad63dcd --- /dev/null +++ b/scripts/Makefile.asm-generic @@ -0,0 +1,58 @@ +# SPDX-License-Identifier: GPL-2.0 +# include/asm-generic contains a lot of files that are used +# verbatim by several architectures. +# +# This Makefile reads the file arch/$(SRCARCH)/include/(uapi/)/asm/Kbuild +# and for each file listed in this file with generic-y creates +# a small wrapper file in arch/$(SRCARCH)/include/generated/(uapi/)/asm. + +PHONY := all +all: + +src := $(subst /generated,,$(obj)) +-include $(src)/Kbuild + +# $(generic)/Kbuild lists mandatory-y. Exclude um since it is a special case. +ifneq ($(SRCARCH),um) +include $(generic)/Kbuild +endif + +include scripts/Kbuild.include + +redundant := $(filter $(mandatory-y) $(generated-y), $(generic-y)) +redundant += $(foreach f, $(generic-y), $(if $(wildcard $(srctree)/$(src)/$(f)),$(f))) +redundant := $(sort $(redundant)) +$(if $(redundant),\ + $(warning redundant generic-y found in $(src)/Kbuild: $(redundant))) + +# If arch does not implement mandatory headers, fallback to asm-generic ones. +mandatory-y := $(filter-out $(generated-y), $(mandatory-y)) +generic-y += $(foreach f, $(mandatory-y), $(if $(wildcard $(srctree)/$(src)/$(f)),,$(f))) + +generic-y := $(addprefix $(obj)/, $(generic-y)) +generated-y := $(addprefix $(obj)/, $(generated-y)) + +# Remove stale wrappers when the corresponding files are removed from generic-y +old-headers := $(wildcard $(obj)/*.h) +unwanted := $(filter-out $(generic-y) $(generated-y),$(old-headers)) + +quiet_cmd_wrap = WRAP $@ + cmd_wrap = echo "\#include <asm-generic/$*.h>" > $@ + +quiet_cmd_remove = REMOVE $(unwanted) + cmd_remove = rm -f $(unwanted) + +all: $(generic-y) + $(if $(unwanted),$(call cmd,remove)) + @: + +$(obj)/%.h: + $(call cmd,wrap) + +# Create output directory. Skip it if at least one old header exists +# since we know the output directory already exists. +ifeq ($(old-headers),) +$(shell mkdir -p $(obj)) +endif + +.PHONY: $(PHONY) |