Fork of the vendor (Boundary Devices) u-boot for Reform 2, with minor tweaks. The goal is to migrate to mainstream u-boot or barebox ASAP. The main impediment so far is the 4GB RAM config.
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  1. ####
  2. # kbuild: Generic definitions
  3. # Convenient variables
  4. comma := ,
  5. quote := "
  6. squote := '
  7. empty :=
  8. space := $(empty) $(empty)
  9. ###
  10. # Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
  11. dot-target = $(dir $@).$(notdir $@)
  12. ###
  13. # The temporary file to save gcc -MD generated dependencies must not
  14. # contain a comma
  15. depfile = $(subst $(comma),_,$(dot-target).d)
  16. ###
  17. # filename of target with directory and extension stripped
  18. basetarget = $(basename $(notdir $@))
  19. ###
  20. # filename of first prerequisite with directory and extension stripped
  21. baseprereq = $(basename $(notdir $<))
  22. ###
  23. # Escape single quote for use in echo statements
  24. escsq = $(subst $(squote),'\$(squote)',$1)
  25. ###
  26. # Easy method for doing a status message
  27. kecho := :
  28. quiet_kecho := echo
  29. silent_kecho := :
  30. kecho := $($(quiet)kecho)
  31. ###
  32. # filechk is used to check if the content of a generated file is updated.
  33. # Sample usage:
  34. # define filechk_sample
  35. # echo $KERNELRELEASE
  36. # endef
  37. # version.h : Makefile
  38. # $(call filechk,sample)
  39. # The rule defined shall write to stdout the content of the new file.
  40. # The existing file will be compared with the new one.
  41. # - If no file exist it is created
  42. # - If the content differ the new file is used
  43. # - If they are equal no change, and no timestamp update
  44. # - stdin is piped in from the first prerequisite ($<) so one has
  45. # to specify a valid file as first prerequisite (often the kbuild file)
  46. define filechk
  47. $(Q)set -e; \
  48. $(kecho) ' CHK $@'; \
  49. mkdir -p $(dir $@); \
  50. $(filechk_$(1)) < $< > $@.tmp; \
  51. if [ -r $@ ] && cmp -s $@ $@.tmp; then \
  52. rm -f $@.tmp; \
  53. else \
  54. $(kecho) ' UPD $@'; \
  55. mv -f $@.tmp $@; \
  56. fi
  57. endef
  58. ######
  59. # gcc support functions
  60. # See documentation in Documentation/kbuild/makefiles.txt
  61. # cc-cross-prefix
  62. # Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
  63. # Return first prefix where a prefix$(CC) is found in PATH.
  64. # If no $(CC) found in PATH with listed prefixes return nothing
  65. cc-cross-prefix = \
  66. $(word 1, $(foreach c,$(1), \
  67. $(shell set -e; \
  68. if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \
  69. echo $(c); \
  70. fi)))
  71. # output directory for tests below
  72. TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
  73. # try-run
  74. # Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
  75. # Exit code chooses option. "$$TMP" is can be used as temporary file and
  76. # is automatically cleaned up.
  77. # modifed for U-Boot: prevent cc-option from leaving .*.su files
  78. try-run = $(shell set -e; \
  79. TMP="$(TMPOUT).$$$$.tmp"; \
  80. TMPO="$(TMPOUT).$$$$.o"; \
  81. TMPSU="$(TMPOUT).$$$$.su"; \
  82. if ($(1)) >/dev/null 2>&1; \
  83. then echo "$(2)"; \
  84. else echo "$(3)"; \
  85. fi; \
  86. rm -f "$$TMP" "$$TMPO" "$$TMPSU")
  87. # as-option
  88. # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
  89. as-option = $(call try-run,\
  90. $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2))
  91. # as-instr
  92. # Usage: cflags-y += $(call as-instr,instr,option1,option2)
  93. as-instr = $(call try-run,\
  94. printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
  95. # cc-option
  96. # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
  97. cc-option = $(call try-run,\
  98. $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
  99. # cc-option-yn
  100. # Usage: flag := $(call cc-option-yn,-march=winchip-c6)
  101. cc-option-yn = $(call try-run,\
  102. $(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
  103. # cc-option-align
  104. # Prefix align with either -falign or -malign
  105. cc-option-align = $(subst -functions=0,,\
  106. $(call cc-option,-falign-functions=0,-malign-functions=0))
  107. # cc-disable-warning
  108. # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
  109. cc-disable-warning = $(call try-run,\
  110. $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
  111. # cc-name
  112. # Expands to either gcc or clang
  113. cc-name = $(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc)
  114. # cc-version
  115. cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
  116. # cc-fullversion
  117. cc-fullversion = $(shell $(CONFIG_SHELL) \
  118. $(srctree)/scripts/gcc-version.sh -p $(CC))
  119. # cc-ifversion
  120. # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
  121. cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4))
  122. # added for U-Boot
  123. binutils-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/binutils-version.sh $(AS))
  124. dtc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/dtc-version.sh $(DTC))
  125. # cc-ldoption
  126. # Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
  127. cc-ldoption = $(call try-run,\
  128. $(CC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
  129. # ld-option
  130. # Usage: LDFLAGS += $(call ld-option, -X)
  131. ld-option = $(call try-run,\
  132. $(CC) -x c /dev/null -c -o "$$TMPO" ; $(LD) $(1) "$$TMPO" -o "$$TMP",$(1),$(2))
  133. # ar-option
  134. # Usage: KBUILD_ARFLAGS := $(call ar-option,D)
  135. # Important: no spaces around options
  136. ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
  137. # ld-version
  138. # Note this is mainly for HJ Lu's 3 number binutil versions
  139. ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
  140. # ld-ifversion
  141. # Usage: $(call ld-ifversion, -ge, 22252, y)
  142. ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4))
  143. ######
  144. ###
  145. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
  146. # Usage:
  147. # $(Q)$(MAKE) $(build)=dir
  148. build := -f $(srctree)/scripts/Makefile.build obj
  149. ###
  150. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
  151. # Usage:
  152. # $(Q)$(MAKE) $(modbuiltin)=dir
  153. modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
  154. ###
  155. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
  156. # Usage:
  157. # $(Q)$(MAKE) $(dtbinst)=dir
  158. dtbinst := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtbinst obj
  159. ###
  160. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
  161. # Usage:
  162. # $(Q)$(MAKE) $(clean)=dir
  163. clean := -f $(srctree)/scripts/Makefile.clean obj
  164. ###
  165. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj=
  166. # Usage:
  167. # $(Q)$(MAKE) $(hdr-inst)=dir
  168. hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
  169. # Prefix -I with $(srctree) if it is not an absolute path.
  170. # skip if -I has no parameter
  171. addtree = $(if $(patsubst -I%,%,$(1)), \
  172. $(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1))
  173. # Find all -I options and call addtree
  174. flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o)))
  175. # echo command.
  176. # Short version is used, if $(quiet) equals `quiet_', otherwise full one.
  177. echo-cmd = $(if $($(quiet)cmd_$(1)),\
  178. echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
  179. # printing commands
  180. cmd = @$(echo-cmd) $(cmd_$(1))
  181. # Add $(obj)/ for paths that are not absolute
  182. objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
  183. ###
  184. # if_changed - execute command if any prerequisite is newer than
  185. # target, or command line has changed
  186. # if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
  187. # including used config symbols
  188. # if_changed_rule - as if_changed but execute rule instead
  189. # See Documentation/kbuild/makefiles.txt for more info
  190. ifneq ($(KBUILD_NOCMDDEP),1)
  191. # Check if both arguments has same arguments. Result is empty string if equal.
  192. # User may override this check using make KBUILD_NOCMDDEP=1
  193. arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
  194. $(filter-out $(cmd_$@), $(cmd_$(1))) )
  195. else
  196. arg-check = $(if $(strip $(cmd_$@)),,1)
  197. endif
  198. # Replace >$< with >$$< to preserve $ when reloading the .cmd file
  199. # (needed for make)
  200. # Replace >#< with >\#< to avoid starting a comment in the .cmd file
  201. # (needed for make)
  202. # Replace >'< with >'\''< to be able to enclose the whole string in '...'
  203. # (needed for the shell)
  204. make-cmd = $(call escsq,$(subst \#,\\\#,$(subst $$,$$$$,$(cmd_$(1)))))
  205. # Find any prerequisites that is newer than target or that does not exist.
  206. # PHONY targets skipped in both cases.
  207. any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
  208. # Execute command if command has changed or prerequisite(s) are updated.
  209. #
  210. if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
  211. @set -e; \
  212. $(echo-cmd) $(cmd_$(1)); \
  213. printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
  214. # Execute the command and also postprocess generated .d dependencies file.
  215. if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \
  216. @set -e; \
  217. $(echo-cmd) $(cmd_$(1)); \
  218. scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
  219. rm -f $(depfile); \
  220. mv -f $(dot-target).tmp $(dot-target).cmd)
  221. # Usage: $(call if_changed_rule,foo)
  222. # Will check if $(cmd_foo) or any of the prerequisites changed,
  223. # and if so will execute $(rule_foo).
  224. if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \
  225. @set -e; \
  226. $(rule_$(1)))
  227. ###
  228. # why - tell why a a target got build
  229. # enabled by make V=2
  230. # Output (listed in the order they are checked):
  231. # (1) - due to target is PHONY
  232. # (2) - due to target missing
  233. # (3) - due to: file1.h file2.h
  234. # (4) - due to command line change
  235. # (5) - due to missing .cmd file
  236. # (6) - due to target not in $(targets)
  237. # (1) PHONY targets are always build
  238. # (2) No target, so we better build it
  239. # (3) Prerequisite is newer than target
  240. # (4) The command line stored in the file named dir/.target.cmd
  241. # differed from actual command line. This happens when compiler
  242. # options changes
  243. # (5) No dir/.target.cmd file (used to store command line)
  244. # (6) No dir/.target.cmd file and target not listed in $(targets)
  245. # This is a good hint that there is a bug in the kbuild file
  246. ifeq ($(KBUILD_VERBOSE),2)
  247. why = \
  248. $(if $(filter $@, $(PHONY)),- due to target is PHONY, \
  249. $(if $(wildcard $@), \
  250. $(if $(strip $(any-prereq)),- due to: $(any-prereq), \
  251. $(if $(arg-check), \
  252. $(if $(cmd_$@),- due to command line change, \
  253. $(if $(filter $@, $(targets)), \
  254. - due to missing .cmd file, \
  255. - due to $(notdir $@) not in $$(targets) \
  256. ) \
  257. ) \
  258. ) \
  259. ), \
  260. - due to target missing \
  261. ) \
  262. )
  263. echo-why = $(call escsq, $(strip $(why)))
  264. endif
  265. ifdef CONFIG_SPL_BUILD
  266. SPL_ := SPL_
  267. ifeq ($(CONFIG_TPL_BUILD),y)
  268. SPL_TPL_ := TPL_
  269. else
  270. SPL_TPL_ := SPL_
  271. endif
  272. else
  273. SPL_ :=
  274. SPL_TPL_ :=
  275. endif