buildlib/defaults.mak

   1 # -*- make -*-
   2
   3 # This file configures the default environment for the make system
   4 # The way it works is fairly simple, each module is defined in it's
   5 # own *.mak file. It expects a set of variables to be set to values
   6 # for it to operate as expected. When included the module generates
   7 # the requested rules based on the contents of its control variables.
   8
   9 # This works out very well and allows a good degree of flexability.
  10 # To accomidate some of the features we introduce the concept of
  11 # local variables. To do this we use the 'Computed Names' feature of
  12 # gmake. Each module declares a LOCAL scope and access it with,
  13 #   $($(LOCAL)-VAR)
  14 # This works very well but it is important to rembember that within
  15 # a rule the LOCAL var is unavailble, it will have to be constructed
  16 # from the information in the rule invokation. For stock rules like
  17 # clean this is simple, we use a local clean rule called clean/$(LOCAL)
  18 # and then within the rule $(@F) gets back $(LOCAL)! Other rules will
  19 # have to use some other mechanism (filter perhaps?) The reason such
  20 # lengths are used is so that each directory can contain several 'instances'
  21 # of any given module
  22
  23 # A build directory is used by default, all generated items get put into
  24 # there. However unlike automake this is not done with a VPATH build
  25 # (vpath builds break the distinction between #include "" and #include <>)
  26 # but by explicly setting the BUILD variable. Make is invoked from
  27 # within the source itself which is much more compatible with compilation
  28 # environments.
  29
  30 ifndef BUILD
  31 BUILD=$(BASE)/build
  32 endif
  33
  34 # Base definitions
  35 INCLUDE := $(BUILD)/include
  36 BIN := $(BUILD)/bin
  37 LIB := $(BIN)
  38 OBJ := $(BUILD)/obj
  39 DEP := $(OBJ)
  40
  41 # Module types
  42 LIBRARY_H=$(BASE)/buildlib/library.mak
  43
  44 # Source location control
  45 # SUBDIRS specifies sub components of the module that
  46 # may be located in subdrictories of the source dir.
  47 # This should be declared before including this file
  48 SUBDIRS+=
  49
  50 # Header file control.
  51 # TARGETDIRS indicitates all of the locations that public headers
  52 # will be published to.
  53 # This should be declared before including this file
  54 HEADER_TARGETDIRS+=
  55
  56 # Options
  57 CXX = c++
  58 CC = cc
  59 CPPFLAGS+= -I$(INCLUDE)
  60 CXXFLAGS+= -Wall -g -fno-implicit-templates  -fno-exceptions
  61 PICFLAGS+= -fPIC -DPIC
  62 LFLAGS+=
  63 INLINEDEPFLAG = -MD
  64
  65 # Phony rules. Other things hook these by appending to the dependency
  66 # list
  67 .PHONY: headers library clean veryclean all binary program
  68 all: binary
  69 binary: library program
  70 headers library clean veryclean program:
  71
  72 # Header file control. We want all published interface headers to go
  73 # into the build directory from thier source dirs. We setup some
  74 # search paths here
  75 vpath %.h $(SUBDIRS)
  76 $(INCLUDE)/%.h $(addprefix $(INCLUDE)/,$(addsuffix /%.h,$(HEADER_TARGETDIRS))) : %.h
  77         cp $< $@
  78
  79 # Dependency generation. We want to generate a .d file using gnu cpp.
  80 # For GNU systems the compiler can spit out a .d file while it is compiling,
  81 # this is specified with the INLINEDEPFLAG. Other systems might have a
  82 # makedep program that can be called after compiling, that's illistrated
  83 # by the DEPFLAG case.
  84 # Compile rules are expected to call this macro after calling the compiler
  85  ifdef INLINEDEPFLAG
  86  define DoDep
  87         sed -e "1s/.*:/$(subst /,\\/,$@):/" $(basename $(@F)).d > $(DEP)/$(basename $(@F)).d
  88         -rm -f $(basename $(@F)).d
  89  endef
  90 else
  91  ifdef DEPFLAG
  92   define DoDep
  93         $(CXX) $(DEPFLAG) $(CPPFLAGS) -o $@ $<
  94         sed -e "1s/.*:/$(subst /,\\/,$@):/" $(basename $(@F)).d > $(DEP)/$(basename $(@F)).d
  95         -rm -f $(basename $(@F)).d
  96   endef
  97  else
  98   define DoDep
  99   endef
 100  endif
 101 endif