From: Brock Rycenga <brock.rycenga@...>
Date: 2008-09-26T22:42:04+09:00
Subject: Problem with rake and dependencies

Hello:

I am new to rake, and I am stuck on a problem with incremental building.
My rakefile does what I would like, for the most part. If I touch a .c
file, the rakefile functions properly and only builds the necessary
files. However, if I touch the corresponding .h file, my rakefile
assumes everything is up-to-date. I am pretty certain that I am not
importing/loading my dependency files correctly. Please help.

I am using a dependency generation feature that is part of the DSP
compiler we are using. The output from the preprocessor creates files
with a .pp extension, formatted like so:

C:/dir/obj/lcd.obj: C:\dir\lcd.c
C:/dir/obj/lcd.obj: C:\dir\lcd.h
C:/dir/obj/lcd.obj: C:\dir\lcdpanel.h
C:/dir/obj/lcd.obj: C:/CCStudio_v3.3/C6000/cgtools/include/string.h
C:/dir/obj/lcd.obj: C:/CCStudio_v3.3/C6000/cgtools/include/linkage.h

I decided to copy those files to a file with a .mf extension because I
was hoping that the makefile loader would handle things correctly.

Below is my rakefile. Notice that I am attempting to import the
dependency files within my :build_depend task. Unfortunately, I have no
idea what import does, and therefore I have no idea if my dependencies
are getting extracted in a way that rake understands.

###############################################################################
###############################################################################
###############################################################################
###############################################################################
require 'dsp_build_defs'

## The following require's are actually found in my dsp_build_defs.rb
file
require 'rake/clean'
require 'rake/loaders/makefile'
require 'fileutils

include DspRakeFileConstants

###############################################################################
# Create the list of source files, etc.
###############################################################################
#SRC_FILES = FileList["#{DSP_PROJ_ROOT}/**/*.#{C_EXT}"]
SRC_FILES = FileList["#{DSP_PROJ_ROOT}/**/*.#{C_EXT}"].reject {|f| f =~
/cropped/}
DEPEND_FILES = SRC_FILES.ext("#{MF_EXT}")
OBJ_FILES = SRC_FILES.pathmap("#{OBJ_DIR}/%n.#{OBJ_EXT}")

###############################################################################
# Task definitions
###############################################################################
desc 'Default task to build debug version of dsp software'
task :default => :debug_build do
    OBJ_FILES.each do |srcfile|
        #puts "source file: #{srcfile}"
    end
    DEPEND_FILES.each do |depfile|
        #puts "source file: #{depfile}"
    end
end

desc 'Debug_build task that depends on build_depend and build_obj'
task :debug_build => [:build_depend, :build_obj] do
    puts "almost ready to link..."
end

desc 'Release_build task - not currently being called'
task :release_build => RELEASE_BLD

desc 'Build_obj task that depends on the object directory and the object
files'
task :build_obj => [OBJ_DIR, OBJ_FILES].flatten.uniq

desc 'Build_depend task that depends on the dependency files'
task :build_depend => DEPEND_FILES do
    DEPEND_FILES.each do |dep_file|
        puts "Importing #{dep_file}..."
        import "#{dep_file}"
    end
end

directory OBJ_DIR

##############################################################################
# Rule definitions
##############################################################################
rule ".#{DEPEND_EXT}" => ".#{C_EXT}" do |t|
    puts "Building dependency file for #{t.source}"
    sh "#{COMPILER} #{C_OPTS} #{C_DEPEND_OPTS} #{C_OBJ_DIR}
#{C_INC_PATHS} #{C_FLAGS} #{C_TARGET} #{t.source}"
end

rule ".#{OBJ_EXT}" => lambda{|objfile| find_source(objfile)} do |t|
    puts "Building object file for #{t.source}"
    sh "#{COMPILER} #{C_OPTS} #{C_OBJ_DIR} #{C_INC_PATHS} #{C_FLAGS}
#{C_TARGET} #{t.source}"
end

rule ".#{MF_EXT}" => ".#{DEPEND_EXT}" do |t|
    puts "Copying #{t.source} to #{t.name}"
    sh "cp #{t.source} #{t.name}"
end

rule ".#{BIN_EXT}" do |t|
    puts "Linking..."
end
###############################################################################
###############################################################################
###############################################################################
###############################################################################


Thanks, in advance, for the help!


Best Regards,
Brock
-- 
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