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