Rules.mak 7.2 KB

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  1. # Rules.make for busybox
  2. #
  3. # Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
  4. #
  5. # Licensed under GPLv2, see the file LICENSE in this tarball for details.
  6. #
  7. # Pull in the user's busybox configuration
  8. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  9. -include $(top_builddir)/.config
  10. endif
  11. #--------------------------------------------------------
  12. PROG := busybox
  13. MAJOR_VERSION :=1
  14. MINOR_VERSION :=1
  15. SUBLEVEL_VERSION:=0
  16. EXTRAVERSION :=
  17. VERSION :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION)
  18. BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
  19. #--------------------------------------------------------
  20. # With a modern GNU make(1) (highly recommended, that's what all the
  21. # developers use), all of the following configuration values can be
  22. # overridden at the command line. For example:
  23. # make CROSS=powerpc-linux- top_srcdir="$HOME/busybox" PREFIX=/mnt/app
  24. #--------------------------------------------------------
  25. # If you are running a cross compiler, you will want to set 'CROSS'
  26. # to something more interesting... Target architecture is determined
  27. # by asking the CC compiler what arch it compiles things for, so unless
  28. # your compiler is broken, you should not need to specify TARGET_ARCH
  29. CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  30. CC = $(CROSS)gcc
  31. AR = $(CROSS)ar
  32. AS = $(CROSS)as
  33. LD = $(CROSS)ld
  34. NM = $(CROSS)nm
  35. STRIP = $(CROSS)strip
  36. CPP = $(CC) -E
  37. # MAKEFILES = $(top_builddir)/.config
  38. RM = rm
  39. RM_F = $(RM) -f
  40. LN = ln
  41. LN_S = $(LN) -s
  42. MKDIR = mkdir
  43. MKDIR_P = $(MKDIR) -p
  44. MV = mv
  45. CP = cp
  46. # What OS are you compiling busybox for? This allows you to include
  47. # OS specific things, syscall overrides, etc.
  48. TARGET_OS=linux
  49. # Select the compiler needed to build binaries for your development system
  50. HOSTCC = gcc
  51. HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  52. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  53. LC_ALL:= C
  54. # If you want to add some simple compiler switches (like -march=i686),
  55. # especially from the command line, use this instead of CFLAGS directly.
  56. # For optimization overrides, it's better still to set OPTIMIZATION.
  57. CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
  58. # To compile vs some other alternative libc, you may need to use/adjust
  59. # the following lines to meet your needs...
  60. #
  61. # If you are using Red Hat 6.x with the compatible RPMs (for developing under
  62. # Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
  63. # using the compatible RPMs (compat-*) at http://www.redhat.com !
  64. #LIBCDIR:=/usr/i386-glibc20-linux
  65. #
  66. # For other libraries, you are on your own. But these may (or may not) help...
  67. #LDFLAGS+=-nostdlib
  68. #LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
  69. #CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) -funsigned-char
  70. #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
  71. WARNINGS=-Wall -Wstrict-prototypes -Wshadow
  72. CFLAGS=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)
  73. ARFLAGS=cru
  74. # gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest
  75. # get the CC MAJOR/MINOR version
  76. CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1))
  77. CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | tail -n 1))
  78. #--------------------------------------------------------
  79. export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
  80. ifeq ($(strip $(TARGET_ARCH)),)
  81. TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
  82. -e 's/i.86/i386/' \
  83. -e 's/sparc.*/sparc/' \
  84. -e 's/arm.*/arm/g' \
  85. -e 's/m68k.*/m68k/' \
  86. -e 's/ppc/powerpc/g' \
  87. -e 's/v850.*/v850/g' \
  88. -e 's/sh[234]/sh/' \
  89. -e 's/mips-.*/mips/' \
  90. -e 's/mipsel-.*/mipsel/' \
  91. -e 's/cris.*/cris/' \
  92. )
  93. endif
  94. # A nifty macro to make testing gcc features easier
  95. check_gcc=$(shell \
  96. if [ "$(1)" != "" ]; then \
  97. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  98. then echo "$(1)"; else echo "$(2)"; fi \
  99. fi)
  100. # Setup some shortcuts so that silent mode is silent like it should be
  101. ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
  102. export MAKE_IS_SILENT=n
  103. SECHO=@echo
  104. else
  105. export MAKE_IS_SILENT=y
  106. SECHO=-@false
  107. endif
  108. CFLAGS+=$(call check_gcc,-funsigned-char,)
  109. #--------------------------------------------------------
  110. # Arch specific compiler optimization stuff should go here.
  111. # Unless you want to override the defaults, do not set anything
  112. # for OPTIMIZATION...
  113. # use '-Os' optimization if available, else use -O2
  114. OPTIMIZATION:=$(call check_gcc,-Os,-O2)
  115. # Some nice architecture specific optimizations
  116. ifeq ($(strip $(TARGET_ARCH)),arm)
  117. OPTIMIZATION+=-fstrict-aliasing
  118. endif
  119. ifeq ($(strip $(TARGET_ARCH)),i386)
  120. OPTIMIZATION+=$(call check_gcc,-march=i386,)
  121. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  122. OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
  123. -malign-functions=0 -malign-jumps=0 -malign-loops=0)
  124. endif
  125. OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer
  126. #
  127. #--------------------------------------------------------
  128. # If you're going to do a lot of builds with a non-vanilla configuration,
  129. # it makes sense to adjust parameters above, so you can type "make"
  130. # by itself, instead of following it by the same half-dozen overrides
  131. # every time. The stuff below, on the other hand, is probably less
  132. # prone to casual user adjustment.
  133. #
  134. ifeq ($(strip $(CONFIG_LFS)),y)
  135. # For large file summit support
  136. CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
  137. endif
  138. ifeq ($(strip $(CONFIG_DMALLOC)),y)
  139. # For testing mem leaks with dmalloc
  140. CFLAGS+=-DDMALLOC
  141. LIBRARIES:=-ldmalloc
  142. else
  143. ifeq ($(strip $(CONFIG_EFENCE)),y)
  144. LIBRARIES:=-lefence
  145. endif
  146. endif
  147. ifeq ($(strip $(CONFIG_DEBUG)),y)
  148. CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
  149. LDFLAGS +=-Wl,-warn-common
  150. STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
  151. else
  152. CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
  153. LDFLAGS += -Wl,-warn-common
  154. STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
  155. endif
  156. ifeq ($(strip $(CONFIG_STATIC)),y)
  157. LDFLAGS += --static
  158. endif
  159. ifeq ($(strip $(CONFIG_SELINUX)),y)
  160. LIBRARIES += -lselinux
  161. endif
  162. ifeq ($(strip $(PREFIX)),)
  163. PREFIX:=`pwd`/_install
  164. endif
  165. # Additional complications due to support for pristine source dir.
  166. # Include files in the build directory should take precedence over
  167. # the copy in top_srcdir, both during the compilation phase and the
  168. # shell script that finds the list of object files.
  169. # Work in progress by <ldoolitt@recycle.lbl.gov>.
  170. OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
  171. CFLAGS += $(CROSS_CFLAGS)
  172. ifdef BB_INIT_SCRIPT
  173. CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
  174. endif
  175. # Put user-supplied flags at the end, where they
  176. # have a chance of winning.
  177. CFLAGS += $(CFLAGS_EXTRA)
  178. #------------------------------------------------------------
  179. # Installation options
  180. ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y)
  181. INSTALL_OPTS=--hardlinks
  182. endif
  183. ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y)
  184. INSTALL_OPTS=--symlinks
  185. endif
  186. ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y)
  187. INSTALL_OPTS=
  188. endif
  189. .PHONY: dummy