i386/junos/ucla/src/lab2/GNUmakefile

   1 #
   2 # This makefile system follows the structuring conventions
   3 # recommended by Peter Miller in his excellent paper:
   4 #
   5 #       Recursive Make Considered Harmful
   6 #       http://aegis.sourceforge.net/auug97.pdf
   7 #
   8 OBJDIR := obj
   9
  10 # Run 'make V=1' to turn on verbose commands, or 'make V=0' to turn them off.
  11 ifeq ($(V),1)
  12 override V =
  13 endif
  14 ifeq ($(V),0)
  15 override V = @
  16 endif
  17
  18 -include conf/lab.mk
  19
  20 -include conf/env.mk
  21
  22 LABSETUP ?= ./
  23
  24 TOP = .
  25
  26 # Cross-compiler jos toolchain
  27 #
  28 # This Makefile will automatically use the cross-compiler toolchain
  29 # installed as 'i386-jos-elf-*', if one exists.  If the host tools ('gcc',
  30 # 'objdump', and so forth) compile for a 32-bit x86 ELF target, that will
  31 # be detected as well.  If you have the right compiler toolchain installed
  32 # using a different name, set GCCPREFIX explicitly in conf/env.mk
  33
  34 # try to infer the correct GCCPREFIX
  35 GCCPREFIX ?= $(shell if i386-jos-elf-objdump -i 2>&1 | grep '^elf32-i386$$' >/dev/null 2>&1; \
  36         then echo 'i386-jos-elf-'; \
  37         elif objdump -i 2>&1 | grep 'elf32-i386' >/dev/null 2>&1; \
  38         then echo ''; \
  39         else echo "***" 1>&2; \
  40         echo "*** Error: Couldn't find an i386-*-elf version of GCC/binutils." 1>&2; \
  41         echo "*** Is the directory with i386-jos-elf-gcc in your PATH?" 1>&2; \
  42         echo "*** If your i386-*-elf toolchain is installed with a command" 1>&2; \
  43         echo "*** prefix other than 'i386-jos-elf-', set your GCCPREFIX" 1>&2; \
  44         echo "*** environment variable to that prefix and run 'make' again." 1>&2; \
  45         echo "*** To turn off this error, run 'gmake GCCPREFIX= ...'." 1>&2; \
  46         echo "***" 1>&2; exit 1; fi)
  47
  48 # try to infer the correct QEMU
  49 QEMU ?= $(shell if which qemu > /dev/null; \
  50         then echo qemu; exit; \
  51         else \
  52         qemu=/Applications/Q.app/Contents/MacOS/i386-softmmu.app/Contents/MacOS/i386-softmmu; \
  53         if test -x $$qemu; then echo $$qemu; exit; fi; fi; \
  54         echo "***" 1>&2; \
  55         echo "*** Error: Couldn't find a working QEMU executable." 1>&2; \
  56         echo "*** Is the directory containing the qemu binary in your PATH" 1>&2; \
  57         echo "*** or have you tried setting the QEMU variable in conf/env.mk?" 1>&2; \
  58         echo "***" 1>&2; exit 1)
  59
  60
  61 CC      := $(GCCPREFIX)gcc -pipe
  62 AS      := $(GCCPREFIX)as
  63 AR      := $(GCCPREFIX)ar
  64 LD      := $(GCCPREFIX)ld
  65 OBJCOPY := $(GCCPREFIX)objcopy
  66 OBJDUMP := $(GCCPREFIX)objdump
  67 NM      := $(GCCPREFIX)nm
  68
  69 # Native commands
  70 NCC     := gcc $(CC_VER) -pipe
  71 TAR     := gtar
  72 PERL    := perl
  73
  74 # Compiler flags
  75 # -fno-builtin is required to avoid refs to undefined functions in the kernel.
  76 # Only optimize to -O1 to discourage inlining, which complicates backtraces.
  77 CFLAGS := $(CFLAGS) $(DEFS) $(LABDEFS) -O1 -fno-builtin -I$(TOP) -MD
  78 CFLAGS += -Wall -Wno-format -Wno-unused -Werror -gstabs -m32
  79
  80 # Host compiler flags
  81 # Programs that run on the build host, rather than the VM, may require a
  82 # different compiler, and thus different compiler flags.
  83 HOST_CFLAGS := $(CFLAGS)
  84
  85 # Add -fno-stack-protector if the option exists.
  86 CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
  87 HOST_CFLAGS += $(shell gcc -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
  88
  89
  90 # Common linker flags
  91 LDFLAGS := -m elf_i386
  92
  93 # Linker flags for JOS user programs
  94 ULDFLAGS := -T user/user.ld
  95
  96 # libgcc defines some necessary functions
  97 GCC_LIB := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
  98
  99 # Lists that the */Makefrag makefile fragments will add to
 100 OBJDIRS :=
 101
 102 # Make sure that 'all' is the first target
 103 all:
 104
 105 # Eliminate default suffix rules
 106 .SUFFIXES:
 107
 108 # Delete target files if there is an error (or make is interrupted)
 109 .DELETE_ON_ERROR:
 110
 111 # make it so that no intermediate .o files are ever deleted
 112 .PRECIOUS: %.o $(OBJDIR)/boot/%.o $(OBJDIR)/kern/%.o \
 113            $(OBJDIR)/lib/%.o $(OBJDIR)/fs/%.o $(OBJDIR)/net/%.o \
 114            $(OBJDIR)/user/%.o
 115
 116 KERN_CFLAGS := $(CFLAGS) -DJOS_KERNEL -gstabs
 117 USER_CFLAGS := $(CFLAGS) -DJOS_USER -gstabs
 118
 119
 120 # C++ compiler flags
 121 CXX := $(GCCPREFIX)c++ -pipe
 122 KERN_CXXFLAGS := $(KERN_CFLAGS) -fno-exceptions -fno-rtti -Wno-non-virtual-dtor
 123 USER_CXXFLAGS := $(USER_CFLAGS) -fno-exceptions -fno-rtti -Wno-non-virtual-dtor
 124
 125 CXXFILT := $(GCCPREFIX)c++filt
 126
 127
 128
 129 # Include Makefrags for subdirectories
 130 include boot/Makefrag
 131 include kern/Makefrag
 132
 133
 134 # define some "unique" ports for QEMU to listen on; we need up to 4
 135 BASEPORT ?= $(shell expr "(" `id -u` % 1750 ")" "*" 4 + 25000)
 136
 137 # define QEMU options
 138 QEMUOPTS := -hda $(OBJDIR)/kernel.img
 139 IMAGES := $(OBJDIR)/kernel.img
 140 QEMUGRAPHICOPTS := -serial stdio
 141 QEMUNOGRAPHICOPTS := -serial mon:stdio
 142
 143 ifdef VNC
 144 QEMUGRAPHICOPTS += -k en-us -vnc localhost:$(VNC),reverse
 145 endif
 146
 147 ifndef GDB
 148 GDB ?= $(BASEPORT)
 149 else ifeq ($(GDB),1)
 150 GDB ?= $(BASEPORT)
 151 endif
 152 QEMUGDBOPTS = $(shell if $(QEMU) -nographic -help | grep -q '^-gdb'; \
 153         then echo "-gdb tcp::$(GDB)"; else echo "-s -p $(GDB)"; fi)
 154
 155 .gdbinit: .gdbinit.tmpl
 156         sed "s/localhost:1234/localhost:$(GDB)/" < $^ > $@
 157
 158 run qemu: $(IMAGES)
 159         $(QEMU) $(QEMUOPTS) $(QEMUGRAPHICOPTS)
 160
 161 run-nox qemu-nox: $(IMAGES)
 162         @echo "***"
 163         @echo "*** Use Ctrl-a x to exit qemu"
 164         @echo "***"
 165         $(QEMU) -nographic $(QEMUOPTS) $(QEMUNOGRAPHICOPTS)
 166
 167 run-gdb qemu-gdb: $(IMAGES) .gdbinit
 168         @echo "***"
 169         @echo "*** Now run 'gdb'." 1>&2
 170         @echo "***"
 171         $(QEMU) $(QEMUOPTS) $(QEMUGRAPHICOPTS) -S $(QEMUGDBOPTS)
 172
 173 run-nox-gdb qemu-nox-gdb: $(IMAGES) .gdbinit
 174         @echo "***"
 175         @echo "*** Now run 'gdb'." 1>&2
 176         @echo "***"
 177         $(QEMU) -nographic $(QEMUOPTS) $(QEMUNOGRAPHICOPTS) -S $(QEMUGDBOPTS)
 178
 179 print-c++filt:
 180         @if which $(CXXFILT) >/dev/null; then echo $(CXXFILT); else echo cat; fi
 181
 182 print-qemu:
 183         @echo $(QEMU)
 184
 185 print-gdbport:
 186         @echo $(GDB)
 187
 188 print-qemugdb:
 189         @echo $(QEMUGDBOPTS)
 190
 191 # For deleting the build
 192 clean:
 193         rm -rf $(OBJDIR) .gdbinit jos.in kern/programs.c
 194
 195 realclean: clean
 196         rm -rf lab$(LAB).tar.gz jos.out
 197
 198 distclean: realclean
 199         rm -rf conf/gcc.mk
 200
 201 grade: always $(LABSETUP)grade-lab$(LAB).sh $(LABSETUP)grade-functions.sh
 202         @echo $(MAKE) clean
 203         @$(MAKE) clean || \
 204           (echo "'make clean' failed.  HINT: Do you have another running instance of JOS?" && exit 1)
 205         $(MAKE) all
 206         sh $(LABSETUP)grade-lab$(LAB).sh
 207
 208 tarball: realclean
 209         tar cf - `find . -type f | grep -v '^\.*$$' | grep -v '/CVS/' | grep -v '/\.svn/' | grep -v '/\.git/' | grep -v 'lab[0-9].*\.tar\.gz'` | gzip > lab$(LAB)-handin.tar.gz
 210
 211
 212 # This magic automatically generates makefile dependencies
 213 # for header files included from C source files we compile,
 214 # and keeps those dependencies up-to-date every time we recompile.
 215 # See 'mergedep.pl' for more information.
 216 $(OBJDIR)/.deps: $(foreach dir, $(OBJDIRS), $(wildcard $(OBJDIR)/$(dir)/*.d))
 217         @mkdir -p $(@D)
 218         @$(PERL) mergedep.pl $@ $^
 219
 220 -include $(OBJDIR)/.deps
 221
 222 always:
 223         @:
 224
 225 .PHONY: all always \
 226         handin tarball clean realclean distclean grade \
 227         qemu qemu-nox qemu-gdb qemu-nox-gdb \
 228         run run-nox run-gdb run-nox-gdb