From 094a497dd2dba1f47157e07d57f97c338a5ddaa0 Mon Sep 17 00:00:00 2001
From: Arch Librarian <arch@canonical.com>
Date: Mon, 20 Sep 2004 16:50:46 +0000
Subject: First draft of make system and name change to apt-pkg Author: jgg
 Date: 1998-07-12 23:58:20 GMT First draft of make system and name change to
 apt-pkg

---
 buildlib/defaults.mak | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 buildlib/defaults.mak

(limited to 'buildlib/defaults.mak')

diff --git a/buildlib/defaults.mak b/buildlib/defaults.mak
new file mode 100644
index 000000000..b268c4b9b
--- /dev/null
+++ b/buildlib/defaults.mak
@@ -0,0 +1,101 @@
+# -*- make -*-
+
+# This file configures the default environment for the make system
+# The way it works is fairly simple, each module is defined in it's
+# own *.mak file. It expects a set of variables to be set to values
+# for it to operate as expected. When included the module generates
+# the requested rules based on the contents of its control variables.
+
+# This works out very well and allows a good degree of flexability.
+# To accomidate some of the features we introduce the concept of 
+# local variables. To do this we use the 'Computed Names' feature of
+# gmake. Each module declares a LOCAL scope and access it with,
+#   $($(LOCAL)-VAR)
+# This works very well but it is important to rembember that within
+# a rule the LOCAL var is unavailble, it will have to be constructed
+# from the information in the rule invokation. For stock rules like 
+# clean this is simple, we use a local clean rule called clean/$(LOCAL)
+# and then within the rule $(@F) gets back $(LOCAL)! Other rules will
+# have to use some other mechanism (filter perhaps?) The reason such
+# lengths are used is so that each directory can contain several 'instances'
+# of any given module
+
+# A build directory is used by default, all generated items get put into
+# there. However unlike automake this is not done with a VPATH build
+# (vpath builds break the distinction between #include "" and #include <>)
+# but by explicly setting the BUILD variable. Make is invoked from
+# within the source itself which is much more compatible with compilation
+# environments.
+
+ifndef BUILD
+BUILD=$(BASE)/build
+endif
+
+# Base definitions
+INCLUDE := $(BUILD)/include
+BIN := $(BUILD)/bin
+LIB := $(BIN)
+OBJ := $(BUILD)/obj
+DEP := $(OBJ)
+
+# Module types
+LIBRARY_H=$(BASE)/buildlib/library.mak
+
+# Source location control
+# SUBDIRS specifies sub components of the module that
+# may be located in subdrictories of the source dir. 
+# This should be declared before including this file
+SUBDIRS+=
+
+# Header file control. 
+# TARGETDIRS indicitates all of the locations that public headers 
+# will be published to.
+# This should be declared before including this file
+HEADER_TARGETDIRS+=
+
+# Options
+CXX = c++
+CC = cc
+CPPFLAGS+= -I$(INCLUDE)
+CXXFLAGS+= -Wall -g -fno-implicit-templates  -fno-exceptions
+PICFLAGS+= -fPIC -DPIC
+LFLAGS+= 
+INLINEDEPFLAG = -MD
+
+# Phony rules. Other things hook these by appending to the dependency
+# list
+.PHONY: headers library clean veryclean all binary program
+all: binary
+binary: library program
+headers library clean veryclean program:
+
+# Header file control. We want all published interface headers to go
+# into the build directory from thier source dirs. We setup some
+# search paths here
+vpath %.h $(SUBDIRS)
+$(INCLUDE)/%.h $(addprefix $(INCLUDE)/,$(addsuffix /%.h,$(HEADER_TARGETDIRS))) : %.h
+	cp $< $@
+
+# Dependency generation. We want to generate a .d file using gnu cpp.
+# For GNU systems the compiler can spit out a .d file while it is compiling,
+# this is specified with the INLINEDEPFLAG. Other systems might have a 
+# makedep program that can be called after compiling, that's illistrated
+# by the DEPFLAG case.
+# Compile rules are expected to call this macro after calling the compiler
+ ifdef INLINEDEPFLAG
+ define DoDep
+	sed -e "1s/.*:/$(subst /,\\/,$@):/" $(basename $(@F)).d > $(DEP)/$(basename $(@F)).d
+	-rm -f $(basename $(@F)).d
+ endef
+else
+ ifdef DEPFLAG
+  define DoDep
+	$(CXX) $(DEPFLAG) $(CPPFLAGS) -o $@ $<
+	sed -e "1s/.*:/$(subst /,\\/,$@):/" $(basename $(@F)).d > $(DEP)/$(basename $(@F)).d
+	-rm -f $(basename $(@F)).d
+  endef
+ else
+  define DoDep
+  endef
+ endif
+endif	
-- 
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