From 3f2546b2ef55b661fd8dd69682b38992225e86f6 Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Mon, 29 Apr 2019 01:17:54 +0100
Subject: Initial import of qemu-2.4.1

---
 rules.mak | 373 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 373 insertions(+)
 create mode 100644 rules.mak

(limited to 'rules.mak')

diff --git a/rules.mak b/rules.mak
new file mode 100644
index 00000000..aec27f81
--- /dev/null
+++ b/rules.mak
@@ -0,0 +1,373 @@
+
+# Don't use implicit rules or variables
+# we have explicit rules for everything
+MAKEFLAGS += -rR
+
+# Files with this suffixes are final, don't try to generate them
+# using implicit rules
+%.d:
+%.h:
+%.c:
+%.cc:
+%.cpp:
+%.m:
+%.mak:
+
+# Flags for C++ compilation
+QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
+
+# Flags for dependency generation
+QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
+
+# Same as -I$(SRC_PATH) -I., but for the nested source/object directories
+QEMU_INCLUDES += -I$(<D) -I$(@D)
+
+WL_U := -Wl,-u,
+find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 | $2)))
+defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}')
+undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}')
+
+# All the .mo objects in -m variables are also added into corresponding -y
+# variable in unnest-vars, but filtered out here, when LINK is called.
+#
+# The .mo objects are supposed to be linked as a DSO, for module build. So here
+# they are only used as a placeholders to generate those "archive undefined"
+# symbol options (-Wl,-u,$symbol_name), which are the archive functions
+# referenced by the code in the DSO.
+#
+# Also the presence in -y variables will also guarantee they are built before
+# linking executables that will load them. So we can look up symbol reference
+# in LINK.
+#
+# This is necessary because the exectuable itself may not use the function, in
+# which case the function would not be linked in. Then the DSO loading will
+# fail because of the missing symbol.
+process-archive-undefs = $(filter-out %.a %.mo,$1) \
+                $(addprefix $(WL_U), \
+                     $(filter $(call defined-symbols,$(filter %.a, $1)), \
+                              $(call undefined-symbols,$(filter %.mo,$1)))) \
+                $(filter %.a,$1)
+
+extract-libs = $(strip $(foreach o,$1,$($o-libs)))
+expand-objs = $(strip $(sort $(filter %.o,$1)) \
+                  $(foreach o,$(filter %.mo,$1),$($o-objs)) \
+                  $(filter-out %.o %.mo,$1))
+
+%.o: %.c
+	$(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
+%.o: %.rc
+	$(call quiet-command,$(WINDRES) -I. -o $@ $<,"  RC    $(TARGET_DIR)$@")
+
+# If we have a CXX we might have some C++ objects, in which case we
+# must link with the C++ compiler, not the plain C compiler.
+LINKPROG = $(or $(CXX),$(CC))
+
+ifeq ($(LIBTOOL),)
+LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
+       $(call process-archive-undefs, $1) \
+       $(version-obj-y) $(call extract-libs,$1) $(LIBS),"  LINK  $(TARGET_DIR)$@")
+else
+LIBTOOL += $(if $(V),,--quiet)
+%.lo: %.c
+	$(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($*.o-cflags) -c -o $@ $<,"  lt CC $@")
+%.lo: %.rc
+	$(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC   $(TARGET_DIR)$@")
+%.lo: %.dtrace
+	$(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
+
+LINK = $(call quiet-command,\
+       $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \
+       )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
+       $(call process-archive-undefs, $1)\
+       $(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \
+       $(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \
+       $(call extract-libs,$(1:.lo=.o)) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", "  LINK  ")"$(TARGET_DIR)$@")
+endif
+
+%.asm: %.S
+	$(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<,"  CPP   $(TARGET_DIR)$@")
+
+%.o: %.asm
+	$(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<,"  AS    $(TARGET_DIR)$@")
+
+%.o: %.cc
+	$(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
+
+%.o: %.cpp
+	$(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
+
+%.o: %.m
+	$(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
+
+%.o: %.dtrace
+	$(call quiet-command,dtrace -o $@ -G -s $<, "  GEN   $(TARGET_DIR)$@")
+
+DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
+module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
+%$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
+%$(DSOSUF): %.mo
+	$(call LINK,$^)
+	@# Copy to build root so modules can be loaded when program started without install
+	$(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), "  CP    $(subst /,-,$@)"))
+
+
+LD_REL := $(CC) -nostdlib -Wl,-r
+
+%.mo:
+	$(call quiet-command,$(LD_REL) -o $@ $^,"  LD -r $(TARGET_DIR)$@")
+
+.PHONY: modules
+modules:
+
+%$(EXESUF): %.o
+	$(call LINK,$^)
+
+%.a:
+	$(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
+
+quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
+
+# cc-option
+# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
+
+cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
+              >/dev/null 2>&1 && echo OK), $2, $3)
+
+VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
+set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
+
+# install-prog list, dir
+define install-prog
+	$(INSTALL_DIR) "$2"
+	$(INSTALL_PROG) $1 "$2"
+	$(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
+endef
+
+# find-in-path
+# Usage: $(call find-in-path, prog)
+# Looks in the PATH if the argument contains no slash, else only considers one
+# specific directory.  Returns an # empty string if the program doesn't exist
+# there.
+find-in-path = $(if $(find-string /, $1), \
+        $(wildcard $1), \
+        $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
+
+# Logical functions (for operating on y/n values like CONFIG_FOO vars)
+# Inputs to these must be either "y" (true) or "n" or "" (both false)
+# Output is always either "y" or "n".
+# Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
+# Logical NOT
+lnot = $(if $(subst n,,$1),n,y)
+# Logical AND
+land = $(if $(findstring yy,$1$2),y,n)
+# Logical OR
+lor = $(if $(findstring y,$1$2),y,n)
+# Logical XOR (note that this is the inverse of leqv)
+lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
+# Logical equivalence (note that leqv "","n" is true)
+leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
+# Logical if: like make's $(if) but with an leqv-like test
+lif = $(if $(subst n,,$1),$2,$3)
+
+# String testing functions: inputs to these can be any string;
+# the output is always either "y" or "n". Leading and trailing whitespace
+# is ignored when comparing strings.
+# String equality
+eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
+# String inequality
+ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
+# Emptiness/non-emptiness tests:
+isempty = $(if $1,n,y)
+notempty = $(if $1,y,n)
+
+# Generate files with tracetool
+TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
+
+# Generate timestamp files for .h include files
+
+config-%.h: config-%.h-timestamp
+	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
+
+config-%.h-timestamp: config-%.mak
+	$(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, "  GEN   $(TARGET_DIR)config-$*.h")
+
+.PHONY: clean-timestamp
+clean-timestamp:
+	rm -f *.timestamp
+clean: clean-timestamp
+
+# will delete the target of a rule if commands exit with a nonzero exit status
+.DELETE_ON_ERROR:
+
+# save-vars
+# Usage: $(call save-vars, vars)
+# Save each variable $v in $vars as save-vars-$v, save their object's
+# variables, then clear $v.
+define save-vars
+    $(foreach v,$1,
+        $(eval save-vars-$v := $(value $v))
+        $(foreach o,$($v),
+            $(foreach k,cflags libs objs,
+                $(if $($o-$k),
+                    $(eval save-vars-$o-$k := $($o-$k))
+                    $(eval $o-$k := ))))
+        $(eval $v := ))
+endef
+
+# load-vars
+# Usage: $(call load-vars, vars, add_var)
+# Load the saved value for each variable in @vars, and the per object
+# variables.
+# Append @add_var's current value to the loaded value.
+define load-vars
+    $(eval $2-new-value := $(value $2))
+    $(foreach v,$1,
+        $(eval $v := $(value save-vars-$v))
+        $(foreach o,$($v),
+            $(foreach k,cflags libs objs,
+                $(if $(save-vars-$o-$k),
+                    $(eval $o-$k := $(save-vars-$o-$k))
+                    $(eval save-vars-$o-$k := ))))
+        $(eval save-vars-$v := ))
+    $(eval $2 := $(value $2) $($2-new-value))
+endef
+
+# fix-paths
+# Usage: $(call fix-paths, obj_path, src_path, vars)
+# Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
+# directories in @vars.
+define fix-paths
+    $(foreach v,$3,
+        $(foreach o,$($v),
+            $(if $($o-libs),
+                $(eval $1$o-libs := $($o-libs)))
+            $(if $($o-cflags),
+                $(eval $1$o-cflags := $($o-cflags)))
+            $(if $($o-objs),
+                $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
+        $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
+                     $(addprefix $2,$(filter %/,$($v)))))
+endef
+
+# unnest-var-recursive
+# Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
+#
+# Unnest @var by including subdir Makefile.objs, while protect others in @vars
+# unchanged.
+#
+# @obj_prefix is the starting point of object path prefix.
+#
+define unnest-var-recursive
+    $(eval dirs := $(sort $(filter %/,$($3))))
+    $(eval $3 := $(filter-out %/,$($3)))
+    $(foreach d,$(dirs:%/=%),
+            $(call save-vars,$2)
+            $(eval obj := $(if $1,$1/)$d)
+            $(eval -include $(SRC_PATH)/$d/Makefile.objs)
+            $(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
+            $(call load-vars,$2,$3)
+            $(call unnest-var-recursive,$1,$2,$3))
+endef
+
+# unnest-vars
+# Usage: $(call unnest-vars, obj_prefix, vars)
+#
+# @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
+# ending '/'.
+#
+# @vars: the list of variable names to unnest.
+#
+# This macro will scan subdirectories's Makefile.objs, include them, to build
+# up each variable listed in @vars.
+#
+# Per object and per module cflags and libs are saved with relative path fixed
+# as well, those variables include -libs, -cflags and -objs. Items in -objs are
+# also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
+#
+# All nested variables postfixed by -m in names are treated as DSO variables,
+# and will be built as modules, if enabled.
+#
+# A simple example of the unnest:
+#
+#     obj_prefix = ..
+#     vars = hot cold
+#     hot  = fire.o sun.o season/
+#     cold = snow.o water/ season/
+#
+# Unnest through a faked source directory structure:
+#
+#     SRC_PATH
+#        ├── water
+#        │   └── Makefile.objs──────────────────┐
+#        │       │ hot += steam.o               │
+#        │       │ cold += ice.mo               │
+#        │       │ ice.mo-libs := -licemaker    │
+#        │       │ ice.mo-objs := ice1.o ice2.o │
+#        │       └──────────────────────────────┘
+#        │
+#        └── season
+#            └── Makefile.objs──────┐
+#                │ hot += summer.o  │
+#                │ cold += winter.o │
+#                └──────────────────┘
+#
+# In the end, the result will be:
+#
+#     hot  = ../fire.o ../sun.o ../season/summer.o
+#     cold = ../snow.o ../water/ice.mo ../season/winter.o
+#     ../water/ice.mo-libs = -licemaker
+#     ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
+#
+# Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
+# included.
+#
+define unnest-vars
+    # In the case of target build (i.e. $1 == ..), fix path for top level
+    # Makefile.objs objects
+    $(if $1,$(call fix-paths,$1/,,$2))
+
+    # Descend and include every subdir Makefile.objs
+    $(foreach v, $2,
+        $(call unnest-var-recursive,$1,$2,$v)
+        # Pass the .mo-cflags and .mo-libs along to its member objects
+        $(foreach o, $(filter %.mo,$($v)),
+            $(foreach p,$($o-objs),
+                $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
+                $(if $($o-libs), $(eval $p-libs += $($o-libs))))))
+
+    # For all %.mo objects that are directly added into -y, just expand them
+    $(foreach v,$(filter %-y,$2),
+        $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))
+
+    $(foreach v,$(filter %-m,$2),
+        # All .o found in *-m variables are single object modules, create .mo
+        # for them
+        $(foreach o,$(filter %.o,$($v)),
+            $(eval $(o:%.o=%.mo)-objs := $o))
+        # Now unify .o in -m variable to .mo
+        $(eval $v := $($v:%.o=%.mo))
+        $(eval modules-m += $($v))
+
+        # For module build, build shared libraries during "make modules"
+        # For non-module build, add -m to -y
+        $(if $(CONFIG_MODULES),
+             $(foreach o,$($v),
+                   $(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS))
+                   $(eval $o: $($o-objs)))
+             $(eval $(patsubst %-m,%-y,$v) += $($v))
+             $(eval modules: $($v:%.mo=%$(DSOSUF))),
+             $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
+
+    # Post-process all the unnested vars
+    $(foreach v,$2,
+        $(foreach o, $(filter %.mo,$($v)),
+            # Find all the .mo objects in variables and add dependency rules
+            # according to .mo-objs. Report error if not set
+            $(if $($o-objs),
+                $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
+                $(error $o added in $v but $o-objs is not set)))
+        $(shell mkdir -p ./ $(sort $(dir $($v))))
+        # Include all the .d files
+        $(eval -include $(addsuffix *.d, $(sort $(dir $($v)))))
+        $(eval $v := $(filter-out %/,$($v))))
+endef
-- 
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