Merged mcb30-realmode-redesign back to HEAD

src/Makefile

@@ -1,15 +1,145 @@
-# Override ARCH here or on the command line
-# ARCH=i386
-# Additionally you can supply extra compilation arguments, e.g. for x86_64
-# EXTRA_CFLAGS=-m32
-# EXTRA_ASFLAGS=--32
-# EXTRA_LDFLAGS=-m elf_i386
-ifndef ARCH
-ARCH:=$(shell uname -m | sed -e s,i[3456789]86,i386,)
-endif
-MAKEDEPS:=
-SUFFIXES:=
+# Initialise variables that get added to throughout the various Makefiles
+#
+MAKEDEPS	:= Makefile .toolcheck
+SRCDIRS		:=
+SRCS		:=
+NON_AUTO_SRCS	:=
+DRIVERS		:=
+ROMS		:=
+MEDIA		:=
+NON_AUTO_MEDIA	:=
 
+# Grab the central Config file.
+#
+MAKEDEPS	+= Config
 include Config
+
+# If no architecture is specified in Config or on the command-line,
+# use that of the build machine.
+#
+ifndef ARCH
+ARCH		:= $(shell uname -m | sed -e s,i[3456789]86,i386,)
+endif
+
+# Drag in architecture-specific Config
+#
+MAKEDEPS	+= arch/$(ARCH)/Config
 include arch/$(ARCH)/Config
-include Makefile.main
+
+# If invoked with no build target, print out a helpfully suggestive
+# message.
+#
+noargs : blib
+	@echo '===================================================='
+	@echo 'No target specified. To specify a target, do: '
+	@echo
+	@echo '    $(MAKE) bin/<rom-name>.<output-format> '
+	@echo
+	@echo 'where <output-format> is one of [z]{$(MEDIA) }'
+	@echo
+	@echo 'or: '
+	@echo
+	@echo '    $(MAKE) all<output-format>s'
+	@echo
+	@echo 'to generate all possible images of format <output-format>'
+	@echo
+	@echo 'For example, '
+	@echo
+	@echo '    make allzroms '
+	@echo
+	@echo 'will generate all possible .zrom (rom burnable) images, and'
+	@echo
+	@echo '    make allzdsks'
+	@echo
+	@echo 'will generate all possible .zdsk (bootable floppy) images, or'
+	@echo
+	@echo '===================================================='
+	@exit 1
+
+# Locations of utilities
+#
+HOST_CC		?= gcc
+CPP		?= gcc -E -Wp,-Wall
+RM		?= rm -f
+TOUCH		?= touch
+MKDIR		?= mkdir
+PERL		?= /usr/bin/perl
+CC		?= $(CROSS_COMPILE)gcc
+AS		?= $(CROSS_COMPILE)as
+LD		?= $(CROSS_COMPILE)ld
+SIZE		?= $(CROSS_COMPILE)size
+AR		?= $(CROSS_COMPILE)ar
+RANLIB		?= $(CROSS_COMPILE)ranlib
+OBJCOPY		?= $(CROSS_COMPILE)objcopy
+PARSEROM	?= $(PERL) ./util/parserom.pl
+MAKEROM		?= $(PERL) ./util/makerom.pl
+NRV2B		?= ./util/nrv2b
+
+# Location to place generated files
+#
+BIN		?= bin
+
+# Library containing all compiled objects
+BLIB	= $(BIN)/blib.a
+
+# Common flags
+#
+CFLAGS		+= -I include -I arch/$(ARCH)/include -DARCH=$(ARCH)
+CFLAGS		+= -Os -ffreestanding
+CFLAGS		+= -Wall -W -Wno-format
+CFLAGS		+= $(EXTRA_CFLAGS)
+ASFLAGS		+= $(EXTRA_ASFLAGS)
+LDFLAGS		+= $(EXTRA_LDFLAGS)
+
+# CFLAGS for specific object types
+#
+CFLAGS_c	+= 
+CFLAGS_S 	+= -DASSEMBLY
+
+# CFLAGS for specific object files.  You can define
+# e.g. CFLAGS_rtl8139, and have those flags automatically used when
+# compiling bin/rtl8139.o.
+#
+OBJ_CFLAGS	= $(CFLAGS_$(basename $(@F))) \
+		  -DOBJECT=$(subst -,_,$(basename $(@F)))
+$(BIN)/%.flags :
+	@echo $(OBJ_CFLAGS)
+
+# Rules for specific object types.
+#
+COMPILE_c	= $(CC) $(CFLAGS) $(CFLAGS_c) $(OBJ_CFLAGS)
+RULE_c		= $(COMPILE_c) -c $< -o $@
+RULE_c_to_s	= $(COMPILE_c) -S -c $< -o $@ 
+RULE_c_to_c	= $(COMPILE_c) -E -c $< > $@
+
+PREPROCESS_S	= $(CPP) $(CFLAGS) $(CFLAGS_S) $(OBJ_CFLAGS)
+ASSEMBLE_S	= $(AS) $(ASFLAGS)
+RULE_S		= $(PREPROCESS_S) $< | $(ASSEMBLE_S) -o $@
+RULE_S_to_s	= $(PREPROCESS_S) $< > $@
+
+DEBUG_TARGETS	+= c s
+
+# SRCDIRS lists all directories containing source files.
+#
+SRCDIRS		+= core drivers/net drivers/disk
+
+# NON_AUTO_SRCS lists files that are excluded from the normal
+# automatic build system.
+#
+NON_AUTO_SRCS	+= core/elf_loader.c
+
+# Rules for finalising files.  TGT_MAKEROM_FLAGS is defined as part of
+# the automatic build system and varies by target; it includes the
+# "-p 0x1234,0x5678" string to set the PCI IDs.
+#
+FINALISE_rom = $(MAKEROM) $(MAKEROM_FLAGS) $(TGT_MAKEROM_FLAGS) \
+	       -i$(IDENT) $@
+
+# Drag in architecture-specific Makefile
+#
+MAKEDEPS	+= arch/$(ARCH)/Makefile
+include arch/$(ARCH)/Makefile
+
+# Drag in the automatic build system and other housekeeping functions
+MAKEDEPS	+= Makefile.housekeeping
+include Makefile.housekeeping