[Minios-devel] [UNIKRAFT PATCH v2 05/23] kbuild: Add build helper function from Linux

[Sharan Santhanam <sharan.santhanam@xxxxxxxxx>]

Import Makefile.rules from scripts/kbuild.include.
Tag: v5.2

Signed-off-by: Sharan Santhanam <sharan.santhanam@xxxxxxxxx>
---
 support/kconfig.new/Makefile.br               |   1 +
 support/kconfig.new/Makefile.rules            |  84 +++++++++++++++
 .../03-include-makefile-helper-from-kernel    | 102 ++++++++++++++++++
 3 files changed, 187 insertions(+)
 create mode 100644 support/kconfig.new/Makefile.rules
 create mode 100644 
support/kconfig.new/patches/03-include-makefile-helper-from-kernel

diff --git a/support/kconfig.new/Makefile.br b/support/kconfig.new/Makefile.br
index 41c5ce16..0fdbe9ab 100644
--- a/support/kconfig.new/Makefile.br
+++ b/support/kconfig.new/Makefile.br
@@ -4,6 +4,7 @@ top_builddir=../../
 srctree := .
 obj ?= .
 
+include Makefile.rules
 include Makefile
 #HOSTCFLAGS+=-Dinline="" -include foo.h
 -include $(obj)/.depend
diff --git a/support/kconfig.new/Makefile.rules 
b/support/kconfig.new/Makefile.rules
new file mode 100644
index 00000000..78a9c81d
--- /dev/null
+++ b/support/kconfig.new/Makefile.rules
@@ -0,0 +1,84 @@
+kecho := echo
+comma := ,
+
+
+dot-target = $(dir $@).$(notdir $@)
+
+any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
+
+arg-check = $(if $(strip $(cmd_$@)),,1)
+
+make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst 
$$,$$$$,$(cmd_$(1)))))
+
+# printing commands
+cmd = @set -e; $(echo-cmd) $(cmd_$(1))
+
+depfile = $(subst $(comma),_,$(dot-target).d)
+depflags = -Wp$(comma)-MD$(comma)$(call dot-target)
+
+cmd_and_fixdep =                                                \
+       $(cmd);                                                       \
+       $(obj)/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).cmd;\
+       rm -f $(depfile)
+
+if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),$(cmd_and_fixdep),@:)
+
+define multi_depend
+$(foreach m, $(notdir $1), \
+    $(eval $(obj)/$m: \
+    $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
+endef
+
+###
+# filechk is used to check if the content of a generated file is updated.
+# Sample usage:
+#
+# filechk_sample = echo $(KERNELRELEASE)
+# version.h: FORCE
+#   $(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
+# - stdin is piped in from the first prerequisite ($<) so one has
+#   to specify a valid file as first prerequisite (often the kbuild file)
+define filechk
+       $(Q)set -e;             \
+       mkdir -p $(dir $@);         \
+       { $(filechk_$(1)); } > $@.tmp;      \
+       if [ -r $@ ] && cmp -s $@ $@.tmp; then  \
+           rm -f $@.tmp;           \
+       else                    \
+           $(kecho) '  UPD     $@';    \
+           mv -f $@.tmp $@;        \
+       fi
+endef
+
+# Execute command if command has changed or prerequisite(s) are updated.
+if_changed = $(if $(strip $(any-prereq) $(arg-check)),         \
+       $(cmd);\
+       printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
+
+# LEX
+# ---------------------------------------------------------------------------
+quiet_cmd_flex = LEX $@
+cmd_flex = $(LEX) -o$@ -L $<
+
+$(obj)/%.lex.c: $(src)/%.l FORCE
+       $(call if_changed,flex)
+
+# YACC
+# ---------------------------------------------------------------------------
+quiet_cmd_bison = YACC    $@
+cmd_bison = $(YACC) -o$@ -t -l $<
+
+$(obj)/%.tab.c: $(src)/%.y FORCE
+       $(call if_changed,bison)
+
+quiet_cmd_bison_h = YACC    $@
+cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $<
+
+$(obj)/%.tab.h: $(src)/%.y FORCE
+       $(call if_changed,bison_h)
diff --git a/support/kconfig.new/patches/03-include-makefile-helper-from-kernel 
b/support/kconfig.new/patches/03-include-makefile-helper-from-kernel
new file mode 100644
index 00000000..35c79f8f
--- /dev/null
+++ b/support/kconfig.new/patches/03-include-makefile-helper-from-kernel
@@ -0,0 +1,102 @@
+diff --git a/support/kconfig.new/Makefile.br b/support/kconfig.new/Makefile.br
+index 41c5ce1..0fdbe9a 100644
+--- a/support/kconfig.new/Makefile.br
++++ b/support/kconfig.new/Makefile.br
+@@ -4,6 +4,7 @@ top_builddir=../../
+ srctree := .
+ obj ?= .
+ 
++include Makefile.rules
+ include Makefile
+ #HOSTCFLAGS+=-Dinline="" -include foo.h
+ -include $(obj)/.depend
+diff --git a/support/kconfig.new/Makefile.rules 
b/support/kconfig.new/Makefile.rules
+new file mode 100644
+index 0000000..78a9c81
+--- /dev/null
++++ b/support/kconfig.new/Makefile.rules
+@@ -0,0 +1,84 @@
++kecho := echo
++comma := ,
++
++
++dot-target = $(dir $@).$(notdir $@)
++
++any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard 
$^),$^)
++
++arg-check = $(if $(strip $(cmd_$@)),,1)
++
++make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst 
$$,$$$$,$(cmd_$(1)))))
++
++# printing commands
++cmd = @set -e; $(echo-cmd) $(cmd_$(1))
++
++depfile = $(subst $(comma),_,$(dot-target).d)
++depflags = -Wp$(comma)-MD$(comma)$(call dot-target)
++
++cmd_and_fixdep =                                                \
++      $(cmd);                                                       \
++      $(obj)/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).cmd;\
++      rm -f $(depfile)
++
++if_changed_dep = $(if $(strip $(any-prereq) 
$(arg-check)),$(cmd_and_fixdep),@:)
++
++define multi_depend
++$(foreach m, $(notdir $1), \
++    $(eval $(obj)/$m: \
++    $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
++endef
++
++###
++# filechk is used to check if the content of a generated file is updated.
++# Sample usage:
++#
++# filechk_sample = echo $(KERNELRELEASE)
++# version.h: FORCE
++#   $(call filechk,sample)
++#
++# The rule defined shall write to stdout the content of the new file.
++# The existing file will be compared with the new one.
++# - If no file exist it is created
++# - If the content differ the new file is used
++# - If they are equal no change, and no timestamp update
++# - stdin is piped in from the first prerequisite ($<) so one has
++#   to specify a valid file as first prerequisite (often the kbuild file)
++define filechk
++      $(Q)set -e;             \
++      mkdir -p $(dir $@);         \
++      { $(filechk_$(1)); } > $@.tmp;      \
++      if [ -r $@ ] && cmp -s $@ $@.tmp; then  \
++          rm -f $@.tmp;           \
++      else                    \
++          $(kecho) '  UPD     $@';    \
++          mv -f $@.tmp $@;        \
++      fi
++endef
++
++# Execute command if command has changed or prerequisite(s) are updated.
++if_changed = $(if $(strip $(any-prereq) $(arg-check)),                \
++      $(cmd);\
++      printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
++
++# LEX
++# ---------------------------------------------------------------------------
++quiet_cmd_flex = LEX $@
++cmd_flex = $(LEX) -o$@ -L $<
++
++$(obj)/%.lex.c: $(src)/%.l FORCE
++      $(call if_changed,flex)
++
++# YACC
++# ---------------------------------------------------------------------------
++quiet_cmd_bison = YACC    $@
++cmd_bison = $(YACC) -o$@ -t -l $<
++
++$(obj)/%.tab.c: $(src)/%.y FORCE
++      $(call if_changed,bison)
++
++quiet_cmd_bison_h = YACC    $@
++cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $<
++
++$(obj)/%.tab.h: $(src)/%.y FORCE
++      $(call if_changed,bison_h)
-- 
2.20.1


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