Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) # build: Generic definitions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #  Lots of this code have been borrowed or heavily inspired from parts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #  of kbuild code, which is not credited, but mostly developed by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #  Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #  Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) # Convenient variables
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) comma   := ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) squote  := '
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) pound   := \#
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) # Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) dot-target = $(dir $@).$(notdir $@)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) # filename of target with directory and extension stripped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) basetarget = $(basename $(notdir $@))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) # The temporary file to save gcc -MD generated dependencies must not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) # contain a comma
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) depfile = $(subst $(comma),_,$(dot-target).d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) # Check if both arguments has same arguments. Result is empty string if equal.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)                     $(filter-out $(cmd_$@),   $(cmd_$(1))) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) # Escape single quote for use in echo statements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) escsq = $(subst $(squote),'\$(squote)',$1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) # Echo command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) # Short version is used, if $(quiet) equals `quiet_', otherwise full one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) echo-cmd = $(if $($(quiet)cmd_$(1)),\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)            echo '  $(call escsq,$($(quiet)cmd_$(1)))';)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) # Replace >$< with >$$< to preserve $ when reloading the .cmd file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) # (needed for make)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) # Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) # (needed for make)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) # Replace >'< with >'\''< to be able to enclose the whole string in '...'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) # (needed for the shell)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) # Find any prerequisites that is newer than target or that does not exist.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) # PHONY targets skipped in both cases.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) # Copy dependency data into .cmd file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) #  - gcc -M dependency info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #  - command line to create object 'cmd_object :='
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) dep-cmd = $(if $(wildcard $(fixdep)),                                           \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)            $(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;           \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)            rm -f $(depfile);                                                    \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)            mv -f $(dot-target).tmp $(dot-target).cmd,                           \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)            printf '$(pound) cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)            printf '$(pound) using basic dep data\n\n' >> $(dot-target).cmd;           \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)            cat $(depfile) >> $(dot-target).cmd;                                 \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)            printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) # if_changed_dep  - execute command if any prerequisite is newer than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) #                   target, or command line has changed and update
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) #                   dependencies in the cmd file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),         \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76)                   @set -e;                                         \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)                   $(echo-cmd) $(cmd_$(1));                         \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)                   $(dep-cmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) # if_changed      - execute command if any prerequisite is newer than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #                   target, or command line has changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) if_changed = $(if $(strip $(any-prereq) $(arg-check)),                   \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)               @set -e;                                                   \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)               $(echo-cmd) $(cmd_$(1));                                   \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)               printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) # C flags to be used in rule definitions, includes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) # - depfile generation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) # - global $(CFLAGS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) # - per target C flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) # - per object C flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) # - BUILD_STR macro to allow '-D"$(variable)"' constructs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) c_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) c_flags   = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) ## HOSTCC C flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(KBUILD_HOSTCFLAGS) -D"BUILD_STR(s)=\#s" $(HOSTCFLAGS_$(basetarget).o) $(HOSTCFLAGS_$(obj))