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authorEric Andersen2001-10-24 05:26:42 +0000
committerEric Andersen2001-10-24 05:26:42 +0000
commit4bcdd7214217bfdaa2c4015425d439686d5b8b0b (patch)
tree667d387f80c5b5c69ab8b24044614f999f00668a /Rules.mak
parentbdfd0d78bc44e73d693510e70087857785b3b521 (diff)
downloadbusybox-4bcdd7214217bfdaa2c4015425d439686d5b8b0b.zip
busybox-4bcdd7214217bfdaa2c4015425d439686d5b8b0b.tar.gz
Oops. Forgot these....
Diffstat (limited to 'Rules.mak')
-rw-r--r--Rules.mak195
1 files changed, 195 insertions, 0 deletions
diff --git a/Rules.mak b/Rules.mak
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+#
+# 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