2 # This makefile system follows the structuring conventions
3 # recommended by Peter Miller in his excellent paper:
5 # Recursive Make Considered Harmful
6 # http://aegis.sourceforge.net/auug97.pdf
32 # Cross-compiler jos toolchain
34 # This Makefile will automatically use the cross-compiler toolchain
35 # installed as 'i386-jos-elf-*', if one exists. If the host tools ('gcc',
36 # 'objdump', and so forth) compile for a 32-bit x86 ELF target, that will
37 # be detected as well. If you have the right compiler toolchain installed
38 # using a different name, set GCCPREFIX explicitly in conf/env.mk
40 # try to infer the correct GCCPREFIX
42 GCCPREFIX := $(shell if i386-jos-elf-objdump -i 2>&1 | grep '^elf32-i386$$' >/dev/null 2>&1; \
43 then echo 'i386-jos-elf-'; \
44 elif objdump -i 2>&1 | grep 'elf32-i386' >/dev/null 2>&1; \
46 else echo "***" 1>&2; \
47 echo "*** Error: Couldn't find an i386-*-elf version of GCC/binutils." 1>&2; \
48 echo "*** Is the directory with i386-jos-elf-gcc in your PATH?" 1>&2; \
49 echo "*** If your i386-*-elf toolchain is installed with a command" 1>&2; \
50 echo "*** prefix other than 'i386-jos-elf-', set your GCCPREFIX" 1>&2; \
51 echo "*** environment variable to that prefix and run 'make' again." 1>&2; \
52 echo "*** To turn off this error, run 'gmake GCCPREFIX= ...'." 1>&2; \
53 echo "***" 1>&2; exit 1; fi)
56 CC := $(GCCPREFIX)gcc -pipe
57 GCC_LIB := $(shell $(CC) -print-libgcc-file-name)
61 OBJCOPY := $(GCCPREFIX)objcopy
62 OBJDUMP := $(GCCPREFIX)objdump
66 NCC := gcc $(CC_VER) -pipe
71 # -fno-builtin is required to avoid refs to undefined functions in the kernel.
72 # Only optimize to -O1 to discourage inlining, which complicates backtraces.
73 CFLAGS := $(CFLAGS) $(DEFS) $(LABDEFS) -O -fno-builtin -I$(TOP) -MD -Wall -Wno-format -Wno-unused -gstabs
75 # Linker flags for JOS user programs
76 ULDFLAGS := -T user/user.ld
78 # Lists that the */Makefrag makefile fragments will add to
81 # Make sure that 'all' is the first target
84 # Eliminate default suffix rules
87 # Delete target files if there is an error (or make is interrupted)
90 # make it so that no intermediate .o files are ever deleted
91 .PRECIOUS: %.o $(OBJDIR)/boot/%.o $(OBJDIR)/kern/%.o \
92 $(OBJDIR)/lib/%.o $(OBJDIR)/fs/%.o $(OBJDIR)/user/%.o
94 KERN_CFLAGS := $(CFLAGS) -DJOS_KERNEL -gstabs
95 USER_CFLAGS := $(CFLAGS) -DJOS_USER -gstabs
100 # Include Makefrags for subdirectories
101 include boot/Makefrag
102 include kern/Makefrag
105 IMAGES = $(OBJDIR)/kern/bochs.img
108 bochs 'display_library: nogui'
110 # For deleting the build
115 rm -rf lab$(LAB).tar.gz bochs.out bochs.log
120 grade: $(LABSETUP)grade.sh
121 $(V)$(MAKE) clean >/dev/null 2>/dev/null
123 sh $(LABSETUP)grade.sh
126 turnin --submit porterde cs372h-lab$(LAB) lab$(LAB)-handin.tar.gz
129 tar cf - `find . -type f | grep -v '^\.*$$' | grep -v '/CVS/' | grep -v '/\.svn/' | grep -v 'lab[0-9].*\.tar\.gz'` | gzip > lab$(LAB)-handin.tar.gz
133 $(V)rm -f $(OBJDIR)/kern/init.o $(IMAGES)
134 $(V)$(MAKE) "DEFS=-DTEST=_binary_obj_user_$*_start -DTESTSIZE=_binary_obj_user_$*_size" $(IMAGES)
135 bochs -q 'display_library: nogui'
138 $(V)rm -f $(OBJDIR)/kern/init.o $(IMAGES)
139 $(V)$(MAKE) "DEFS=-DTEST=_binary_obj_user_$*_start -DTESTSIZE=_binary_obj_user_$*_size" $(IMAGES)
142 # This magic automatically generates makefile dependencies
143 # for header files included from C source files we compile,
144 # and keeps those dependencies up-to-date every time we recompile.
145 # See 'mergedep.pl' for more information.
146 $(OBJDIR)/.deps: $(foreach dir, $(OBJDIRS), $(wildcard $(OBJDIR)/$(dir)/*.d))
148 @$(PERL) mergedep.pl $@ $^
150 -include $(OBJDIR)/.deps
156 handin tarball clean realclean clean-labsetup distclean grade labsetup