# $(obj-dirs) is a list of directories that contain object files
obj-dirs := $(dir $(multi-objs) $(subdir-obj-y))
-obj-dirs += $(foreach f,$(host-progs), $(if $(dir $(f)),$(dir $(f))))
-obj-dirs := $(strip $(sort $(filter-out ./,$(obj-dirs))))
# Replace multi-part objects by their individual parts, look at local dir only
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
-# C code
-# Executables compiled from a single .c file
-host-csingle := $(foreach m,$(host-progs),$(if $($(m)-objs),,$(m)))
-
-# C executables linked based on several .o files
-host-cmulti := $(foreach m,$(host-progs),\
- $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
-
-# Object (.o) files compiled from .c files
-host-cobjs := $(sort $(foreach m,$(host-progs),$($(m)-objs)))
-
-# C++ code
-# C++ executables compiled from at least on .cc file
-# and zero or more .c files
-host-cxxmulti := $(foreach m,$(host-progs),$(if $($(m)-cxxobjs),$(m)))
-
-# C++ Object (.o) files compiled from .cc files
-host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
-
-# Shared libaries (only .c supported)
-# Shared libraries (.so) - all .so files referenced in "xxx-objs"
-host-cshlib := $(sort $(filter %.so, $(host-cobjs)))
-# Remove .so files from "xxx-objs"
-host-cobjs := $(filter-out %.so,$(host-cobjs))
-
-#Object (.o) files used by the shared libaries
-host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
-
# Add subdir path
extra-y := $(addprefix $(obj)/,$(extra-y))
multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
-host-progs := $(addprefix $(obj)/,$(host-progs))
-host-csingle := $(addprefix $(obj)/,$(host-csingle))
-host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
-host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
-host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
-host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
-host-cshlib := $(addprefix $(obj)/,$(host-cshlib))
-host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
# The temporary file to save gcc -MD generated dependencies must not
# contain a comma
basename_flags = -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F)))
modname_flags = $(if $(filter 1,$(words $(modname))),-DKBUILD_MODNAME=$(subst $(comma),_,$(subst -,_,$(modname))))
-
_c_flags = $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$(*F).o)
_a_flags = $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
-_hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS_$(*F).o)
-_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) $(HOSTCXXFLAGS_$(*F).o)
-
+_cpp_flags = $(CPPFLAGS) $(EXTRA_CPPFLAGS) $(CPPFLAGS_$(@F))
# If building the kernel in a separate objtree expand all occurrences
# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
ifeq ($(KBUILD_SRC),)
__c_flags = $(_c_flags)
__a_flags = $(_a_flags)
-__hostc_flags = $(_hostc_flags)
-__hostcxx_flags = $(_hostcxx_flags)
+__cpp_flags = $(_cpp_flags)
else
# Prefix -I with $(srctree) if it is not an absolute path
# FIXME: Replace both with specific CFLAGS* statements in the makefiles
__c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags)
__a_flags = $(call flags,_a_flags)
-__hostc_flags = -I$(obj) $(call flags,_hostc_flags)
-__hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
+__cpp_flags = $(call flags,_cpp_flags)
endif
c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \
a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \
$(__a_flags) $(modkern_aflags)
-hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
-hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
+cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(__cpp_flags)
ld_flags = $(LDFLAGS) $(EXTRA_LDFLAGS)
# Usage:
# $(Q)$(MAKE) $(build)=dir
build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
+
+# filechk is used to check if the content of a generated file is updated.
+# Sample usage:
+# define filechk_sample
+# echo $KERNELRELEASE
+# endef
+# version.h : Makefile
+# $(call filechk,sample)
+# The rule defined shall write to stdout the content of the new file.
+# The existing file will be compared with the new one.
+# - If no file exist it is created
+# - If the content differ the new file is used
+# - If they are equal no change, and no timestamp update
+
+define filechk
+ $(Q)set -e; \
+ echo ' CHK $@'; \
+ mkdir -p $(dir $@); \
+ $(filechk_$(1)) $(2) > $@.tmp; \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ echo ' UPD $@'; \
+ mv -f $@.tmp $@; \
+ fi
+endef
+
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