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flags.rb
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flags.rb
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# Copyright 2013 David Axmark
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This module contains functions for saving and comparing compile or link flags.
# execFlags and flagsNeeded require the function "cFlags".
module FlagsChanged
# Call from initialize.
def initFlags
# save cflags to disk, for use as dependency.
# but first read it back from disk, if existing.
@FLAGSFILE = @NAME + ".flags"
if(File.exists?(@FLAGSFILE)) then
@OLDFLAGS = open(@FLAGSFILE) { |f| f.read }
end
#puts "Oldflags: #{@OLDFLAGS.inspect}"
end
# Call from execute.
def execFlags
if(@OLDFLAGS != cFlags) then
open(@FLAGSFILE, 'w') { |f| f.write(cFlags) }
@OLDFLAGS = cFlags
end
end
# Call from needed?.
def flagsNeeded?(log=true)
#puts "Oldflags: #{@OLDFLAGS.inspect} newflags: #{@FLAGS.inspect}"
if(@OLDFLAGS != cFlags)
puts "Because the flags have changed:" if(log)
#puts "Old: #{@OLDFLAGS}" if(log)
#puts "New: #{@FLAGS}" if(log)
return true
end
return false
end
end