Software Development

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Software Development

• CS240
• Dick Steflik

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Make

• make is a software engineering tool for
  managing and maintaining computer programs
• Help minimize the life cycle cost of developing
  and maintaining computer software
• Descriptor file
• Name makefile // POT (Plain Old Text)?
• Defines job steps and what the dependencies for
  that job step are .
• Also the actual command for accomplishing that
  job step

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makefile descriptor file

• Made up of
• Macro definitions
• For doing text substitutions
• (name) to invoke
• Comments (start with a character
• Dependency rule
• Target (one or more) dependencies (zero or
  more)
• Name of the file to be created
• (reqd character)?
• Dependencies space delimited list of files reqd
  for this step
• One or more commands (must start with a tab
  character)?

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Sample makefile
prog.exe prog.c bag.o bag.c gcc prog.c
bag.o -oprog.exe bag.o bag.c bag.h gcc bag.c
-c
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Using make

• In the directory where your files are place the
  descriptor file with the name makefile
• No file extension
• At the command prompt enter make
• make will go through the descriptor file checking
  dependencies, insuring that the most recent files
  are included and any intermediate files are
  recompiled if their time/date stamps are more
  recent than the current time/date stamps on the
  dependent files

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Version Control Systems

• Used on multi programmer projects to insure that
  developers don't accidentally destroy each
  other's changes
• Like a library each user has to check files in
  and out, systems prevents one person from saving
  their changes to a file on top of another
  person's changes
• System enforces safe controls
• Changes are saves as a sequence of add, delets
  and modifications to a base file, not as complete
  files

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CVS

• Concurrent Versioning System
• Oldest of the version control systems
• Open Source
• Client-server architecture
• Originally developed for UNIX
• Ported to Windows NT
• Each time a file is checked in, user is required
  to enter a description of what was done
• Commandline and GUI based client programs are
  available.

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Visual SourceSafe

• Originally developed by One Tree Software
• Original name was Delta
• Acquired by Microsoft and rebranded as Visual
  SourceSafe (1994)?
• Integrates with most Microsoft software
  development products
• Not Client Server based

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Subversion

• Open Source version control system
• Circa 2000, goal is to be the preferred successor
  to CVS
• Widely used in the Open Source community for
  version control on projects like Apache, KDE,
  Gnome, gcc, python, ruby, Mono...
• Client-server architecture
• Commandline and GUI clients available for most OS
  environments.