Last modified on 16 January 2014, at 19:34

ROSE Compiler Framework/How to add a new project directory


Most code development that is layered above the ROSE library starts out its life as a project in the projects directory. Some projects are eventually refactored into the ROSE library once they mature. This chapter describes how one adds a new project to ROSE.

Required FilesEdit

A ROSE project encapsulates a complete program or set of related programs that use the ROSE library. Each project exists as a subdirectory of the ROSE "projects" directory and should include files "README", "config/support-rose.m4", "Makefile.am", and any necessary source files, scripts, tests, etc.

  • The "README" should provide an explanation about the project purpose, algorithm, design, implementation, etc.
  • The "support-rose.m4" integrates the project into the ROSE build system in a manner that allows the project to be an optional component (they can be disabled, renamed, deleted, or withheld from distribution without changing any ROSE configuration files). Most older projects are lacking this file and are thus more tightly coupled with the build system.
  • The "Makefile.am" serves as the input to the GNU automake system that ROSE employs to generate Makefiles.
  • Each project should also include all necessary source files, documentation, and test cases.

Setting up support-rose.m4Edit

The "config/support-rose.m4" file integrates the project into the ROSE configure and build system. At a minimum, it should contain a call to the autoconf AC_CONFIG_FILES macro with a list of the project's Makefiles (without the ".am" extension) and its doxygen configuration file (without the ".in" extension). It may also contain any other necessary autoconf checks that are not already performed by ROSE's main configure scripts, including code to enable/disable the project based on the availability of the project's prerequisites.

Here's an example:

dnl List of all makefiles and autoconf-generated                          -*- autoconf -*-
dnl files for this project
AC_CONFIG_FILES([projects/DemoProject/Makefile
                 projects/DemoProject/gui/Makefile
                 projects/DemoProject/doxygen/doxygen.conf
                ])

dnl Even if this project is present in ROSE's "projects" directory, we might not have the
dnl prerequisites to compile this project.  Enable the project's makefiles by using the
dnl ROSE_ENABLE_projectname automake conditional.  Many prerequisites have probably already
dnl been tested by ROSE's main configure script, so we don't need to list them here again
dnl (although it usually doesn't hurt).
AC_MSG_CHECKING([whether DemoProject prerequisites are satisfied])
if test "$ac_cv_header_gcrypt_h" = "yes"; then
        AC_MSG_RESULT([yes])
        rose_enable_demo_project=yes
else
        AC_MSG_RESULT([no])
        rose_enable_demo_project=
fi
AM_CONDITIONAL([ROSE_ENABLE_DEMO_PROJECT], [test "$rose_enable_demo_project" = yes])

Since all configuration for the project is encapsulated in the "support-rose.m4" file, renaming, disabling, or removing the project is trivial: a project can be renamed simply by renaming its directory, it can be disabled by renaming/removing "support-rose.m4", or it can be removed by removing its directory. The "build" and "configure" scripts should be rerun after any of these changes.

Since projects are self-encapsulated and optional parts of ROSE, they need not be distributed with ROSE. This enables end users to drop in their own private projects to an existing ROSE source tree without modifying any ROSE files, and it allows ROSE developers to work on projects that are not distributed publicly. Any project directory that is not part of ROSE's main Git repository will not be distributed (this includes not distributing Git submodules, although the submodule's placeholder empty directory will be distributed).

Setting up Makefile.amEdit

Each project should have at least one Makefile.am, each of which is processed by GNU automake and autoconf to generate a Makefile. See documentation for automake for details about what these files should contain. Some important variables and targets are:

  • include $(top_srcdir)/config/Makefile.for.ROSE.includes.and.libs: This brings in the definitions from the higher level Makefiles and is required by all projects. It should be near the top of the Makefile.am.
  • SUBDIRS: This variable should contain the names all the project's subdirectories that have Makefiles. It may be omitted if the project's only Makefile is in that project's top-level directory.
  • INCLUDES: This would have the the flags that need to be added during compilation (flags like -I$(top_srcdir)/projects/RTC/include). Your flags should be placed before $(ROSE_INCLUDES) to ensure the correct files are found. This brings in all the necessary headers from the src directory to your project.
  • lib_*: These variables/targets are necessary if you are creating a library from your project, which can be linked in with other projects or the src directory later. This is the recommended way of handling projects.
  • EXTRA_DIST: These are the files that are not listed as being needed to build the final object (like source and header files), but must still be in the ROSE tarball distribution. This could include README or configuration files, for example.
  • check-local: This is the target that will be called from the higher level Makefiles when make check is called.
  • clean-local: Provides you with a step to perform manual cleanup of your project, for instance, if you manually created some files (so Automake won't automatically clean them up).

A basic exampleEdit

Many projects start as a translator, analyzer or optimizer, which takes into input code and generate output.

A basic sample commit which adds a new project directory into ROSE: https://github.com/rose-compiler/rose/commit/edf68927596960d96bb773efa25af5e090168f4a

Please look through the diffs so you know what files to be added and changed for a new project.

Essentially, a basic project should contain

  • a README file explaining what this project is about, algorithm, design, implementation, etc
  • a translator acts as a driver of your project
  • additional source files and headers as needed to contain the meat of your project
  • test input files
  • Makefile.am to
    • compile and build your translator
    • contain make check rule so your translator will be invoked to process your input files and generate expected results

To connect your project into ROSE's build system, you also need to

  • Add one more subdir entry into projects/Makefile.am for your project directory
  • Add one line into config/support-rose.m4 for EACH new Makefile (generated from each Makefile.am) used by your projects.

Installing project targetsEdit

Install your project's content to a separate directory within the user's specified --prefix location. The reason behind this is that we don't want to pollute the core ROSE installation space. By doing so, we can reduce the complexity and confusion of the ROSE installation tree, while eliminating cross-project file collisions. It also keeps the installation tree modular.

ExampleEdit

This example uses a prefix for installation. It also maintains Semantic Versioning.

From projects/RosePoly:

  ## 1. Version your project properly (http://semver.org/)
  rosepoly_API_VERSION=0.1.0

  ## 2. Install to separate directory
  ##
  ##    Installation tree should resemble:
  ##
  ##    <--prefix>
  ##    |--bin      # ROSE/bin
  ##    |--include  # ROSE/include
  ##    |--lib      # ROSE/lib
  ##    |
  ##    |--<project>-<version>
  ##       |--bin      # <project>/bin
  ##       |--include  # <project>/include
  ##       |--lib      # <project>/lib
  ##
  exec_prefix=${prefix}/rosepoly-$(rosepoly_API_VERSION)

  ## Installation/include tree should resemble:
  ##   |--<project>-<version>
  ##      |--bin      # <project>/bin
  ##      |--include  # <project>/include
  ##         |--<project>
  ##      |--lib      # <project>/lib
  librosepoly_la_includedir = ${exec_prefix}/include/rosepoly

Generate Doxygen DocumentationEdit

0. Install Doxygen tool

Using MacPorts for Apple's Mac OS:

  $ port install doxygen
 
  # set path to MacPort's bin/
  # ...

Using one of the LLNL machines:

  $ export PATH=/nfs/apps/doxygen/latest/bin:$PATH


1. Create a Doxygen configuration file

  $ doxygen -g
 
Configuration file `Doxyfile' created.
 
Now edit the configuration file and enter
 
  doxygen Doxyfile
 
to generate the documentation for your project


2. Customize the configuration file (Doxyfile):

...

# If the EXTRACT_ALL tag is set to YES doxygen will assume all entities in
# documentation are documented, even if no documentation was available.
# Private class members and static file members will be hidden unless
# the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES

EXTRACT_ALL            = YES

...

# If the value of the INPUT tag contains directories, you can use the
# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp
# and *.h) to filter out the source-files in the directories. If left
# blank the following patterns are tested:
# *.c *.cc *.cxx *.cpp *.c++ *.d *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh
# *.hxx *.hpp *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm *.dox *.py
# *.f90 *.f *.for *.vhd *.vhdl

FILE_PATTERNS          = *.cpp *.hpp

# The RECURSIVE tag can be used to turn specify whether or not subdirectories
# should be searched for input files as well. Possible values are YES and NO.
# If left blank NO is used.

RECURSIVE              = YES

...


3. Generate the Doxygen documentation

  # Invoke from your top-level directory
  $ doxygen Doxyfile


4. View and verify the HTML documentation

  $ firefox html/index.html &

5. Add target to your Makefile.am to generate the documentation

.PHONY: docs
docs:
    doxygen Doxyfile # TODO: should be $(DOXYGEN)