From 4bcdd7214217bfdaa2c4015425d439686d5b8b0b Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Wed, 24 Oct 2001 05:26:42 +0000
Subject: Oops.  Forgot these....

---
 Rules.mak | 195 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 195 insertions(+)
 create mode 100644 Rules.mak

(limited to 'Rules.mak')

diff --git a/Rules.mak b/Rules.mak
new file mode 100644
index 000000000..a6f111695
--- /dev/null
+++ b/Rules.mak
@@ -0,0 +1,195 @@
+#
+# This file contains rules which are shared between multiple Makefiles.
+#
+
+#
+# False targets.
+#
+.PHONY: dummy
+
+#
+# Special variables which should not be exported
+#
+unexport EXTRA_AFLAGS
+unexport EXTRA_CFLAGS
+unexport EXTRA_LDFLAGS
+unexport EXTRA_ARFLAGS
+unexport SUBDIRS
+unexport SUB_DIRS
+unexport ALL_SUB_DIRS
+unexport O_TARGET
+
+unexport obj-y
+unexport obj-n
+unexport obj-
+unexport export-objs
+unexport subdir-y
+unexport subdir-n
+unexport subdir-
+
+#
+# Get things started.
+#
+first_rule: sub_dirs
+	$(MAKE) all_targets
+
+SUB_DIRS	:= $(subdir-y)
+ALL_SUB_DIRS	:= $(sort $(subdir-y) $(subdir-n) $(subdir-))
+
+
+#
+# Common rules
+#
+
+%.s: %.c
+	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -S $< -o $@
+
+%.i: %.c
+	$(CPP) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) $< > $@
+
+%.o: %.c
+	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -c -o $@ $<
+	@ ( \
+	    echo 'ifeq ($(strip $(subst $(comma),:,$(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@))),$$(strip $$(subst $$(comma),:,$$(CFLAGS) $$(EXTRA_CFLAGS) $$(CFLAGS_$@))))' ; \
+	    echo 'FILES_FLAGS_UP_TO_DATE += $@' ; \
+	    echo 'endif' \
+	) > $(dir $@)/.$(notdir $@).flags
+
+%.o: %.s
+	$(AS) $(AFLAGS) $(EXTRA_CFLAGS) -o $@ $<
+
+# Old makefiles define their own rules for compiling .S files,
+# but these standard rules are available for any Makefile that
+# wants to use them.  Our plan is to incrementally convert all
+# the Makefiles to these standard rules.  -- rmk, mec
+ifdef USE_STANDARD_AS_RULE
+
+%.s: %.S
+	$(CPP) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) $< > $@
+
+%.o: %.S
+	$(CC) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) -c -o $@ $<
+
+endif
+
+%.lst: %.c
+	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -g -c -o $*.o $<
+	$(TOPDIR)/scripts/makelst $* $(TOPDIR) $(OBJDUMP)
+#
+#
+#
+all_targets: $(O_TARGET) $(L_TARGET)
+
+#
+# Rule to compile a set of .o files into one .o file
+#
+ifdef O_TARGET
+$(O_TARGET): $(obj-y)
+	rm -f $@
+    ifneq "$(strip $(obj-y))" ""
+	$(LD) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(obj-y), $^)
+    else
+	$(AR) rcs $@
+    endif
+	@ ( \
+	    echo 'ifeq ($(strip $(subst $(comma),:,$(EXTRA_LDFLAGS) $(obj-y))),$$(strip $$(subst $$(comma),:,$$(EXTRA_LDFLAGS) $$(obj-y))))' ; \
+	    echo 'FILES_FLAGS_UP_TO_DATE += $@' ; \
+	    echo 'endif' \
+	) > $(dir $@)/.$(notdir $@).flags
+endif # O_TARGET
+
+#
+# Rule to compile a set of .o files into one .a file
+#
+ifdef L_TARGET
+$(L_TARGET): $(obj-y)
+	rm -f $@
+	$(AR) $(EXTRA_ARFLAGS) rcs $@ $(obj-y)
+	@ ( \
+	    echo 'ifeq ($(strip $(subst $(comma),:,$(EXTRA_ARFLAGS) $(obj-y))),$$(strip $$(subst $$(comma),:,$$(EXTRA_ARFLAGS) $$(obj-y))))' ; \
+	    echo 'FILES_FLAGS_UP_TO_DATE += $@' ; \
+	    echo 'endif' \
+	) > $(dir $@)/.$(notdir $@).flags
+endif
+
+
+#
+# This make dependencies quickly
+#
+fastdep: dummy
+	$(TOPDIR)/scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS) -- $(wildcard *.[chS]) > .depend
+ifdef ALL_SUB_DIRS
+	$(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
+endif
+
+ifdef _FASTDEP_ALL_SUB_DIRS
+$(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
+	$(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
+endif
+
+	
+#
+# A rule to make subdirectories
+#
+subdir-list = $(sort $(patsubst %,_subdir_%,$(SUB_DIRS)))
+sub_dirs: dummy $(subdir-list)
+
+ifdef SUB_DIRS
+$(subdir-list) : dummy
+	$(MAKE) -C $(patsubst _subdir_%,%,$@)
+endif
+
+#
+# A rule to do nothing
+#
+dummy:
+
+#
+# This is useful for testing
+#
+script:
+	$(SCRIPT)
+
+#
+# include dependency files if they exist
+#
+ifneq ($(wildcard .depend),)
+include .depend
+endif
+
+ifneq ($(wildcard $(TOPDIR)/.hdepend),)
+include $(TOPDIR)/.hdepend
+endif
+
+#
+# Find files whose flags have changed and force recompilation.
+# For safety, this works in the converse direction:
+#   every file is forced, except those whose flags are positively up-to-date.
+#
+FILES_FLAGS_UP_TO_DATE :=
+
+# For use in expunging commas from flags, which mung our checking.
+comma = ,
+
+FILES_FLAGS_EXIST := $(wildcard .*.flags)
+ifneq ($(FILES_FLAGS_EXIST),)
+include $(FILES_FLAGS_EXIST)
+endif
+
+FILES_FLAGS_CHANGED := $(strip \
+    $(filter-out $(FILES_FLAGS_UP_TO_DATE), \
+	$(O_TARGET) $(L_TARGET) $(active-objs) \
+	))
+
+# A kludge: .S files don't get flag dependencies (yet),
+#   because that will involve changing a lot of Makefiles.  Also
+#   suppress object files explicitly listed in $(IGNORE_FLAGS_OBJS).
+#   This allows handling of assembly files that get translated into
+#   multiple object files (see arch/ia64/lib/idiv.S, for example).
+FILES_FLAGS_CHANGED := $(strip \
+    $(filter-out $(patsubst %.S, %.o, $(wildcard *.S) $(IGNORE_FLAGS_OBJS)), \
+    $(FILES_FLAGS_CHANGED)))
+
+ifneq ($(FILES_FLAGS_CHANGED),)
+$(FILES_FLAGS_CHANGED): dummy
+endif
-- 
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