HACKING

-*- text -*-

Notes to developers:

- Note that the README file is automatically generated from the main
  page of the doxygen documentation by running "make doc" (or "make
  readme").

- To check that all the code is working:

  make check
  make distcheck
  make check with --enable-debug

  Do this both from inside and outside sources.

- The following tools are necessary to generate all documentation (any
  flavor of "make dist" will fail if these tools are not available):

  - doxygen with man, pdf and html support
  - a latex distribution with pdflatex, and the usually recommended
    package files (such as float.sty) and fonts (such as ptmr8t)
  - fig2dev (transfig package)
  - gs (ghostscript package)
  - epstopdf
  - w3m or lynx (to generate the README)

  On Debian systems, the following packages should be enough:
    doxygen ghostscript texlive-latex-base texlive-latex-recommended
    texlive-fonts-recommended texlive-font-utils transfig w3m
  On RedHat systems:
    ghostscript doxygen transfig tetex tetex-latex w3m

- *** BEFORE MAKING AN OFFICIAL RELEASE TARBALL: the release manager
  MUST update the VERSION file:

  - ensure that the major, minor, and release version numbers are
    correct.  The greek/svn numbers will automatically be stripped by
    make_dist_tarball (see below).
  - ensure that increment the so_version number as appropriate (see
    the GNU Libtool documentation for a description of what to do).

- Create a distribution tarball by running the following from the
  top-level source directory:

  shell$ ./contrib/dist/make_dist_tarball

  It will take a few minutes because it runs "make distcheck" and it
  builds two tarballs (an official release and a greek release).  For
  example, after "make_dist_tarball" completes, you'll have two
  tarballs, like this:

  hwloc-0.9.1.tar.gz
  hwloc-0.9.1rc1.tar.gz

  The "rc1" tarball (or whatever the greek version is) can be
  distributed for testing and validation.  If it passes, then the
  non-rc1 tarball can be released (it's identical to the rc1 tarball
  except for its version).

- Check tarballs by configuring and building them and then running
  "make check".

- make maintainer-clean can be used to properly remove the generated
  documentations.

- Silent rules are used by default to reduce the build verbosity:

  shell$ make
  CC	src/topology.lo

  To revert to the old verbose rules, pass V=1 to make:

  shell$ make V=1
  /bin/sh ../libtool  --tag=CC   --mode=compile gcc [...] -c -o topology.lo topology.c


Building the Windows zipballs on Windows with MinGW:

- Install prerequisites:
  - Visual C++ Express, currently available at:
     http://www.microsoft.com/visualstudio/en-us/products/2010-editions/express)
  - mingw-w64-bin_i686-mingw_<date>.zip if building a 64bits zipball:
     http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Automated%20Builds/
  - mingw-w32-bin_i686-mingw_<date>.zip If building a 32bits zipball,
     or if building a 64bits zipball on a 32bits Windows:
     http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Automated%20Builds/
  - MSYS-<date>.zip
     http://sourceforge.net/projects/mingw-w64/files/External%20binary%20packages%20%28Win64%20hosted%29/MSYS%20%2832-bit%29/
  - findutils-<version>-bin.zip
     http://sourceforge.net/projects/ezwinports/files/
  Unpack all these ZIPs in a path that does not contain spaces,
  to avoid problems later.

- Launch msys.bat (in the root directory of the extracted MSYS ZIP).

- Your path must contain:
  - The bin directory of the extracted MinGW ZIP
    (it contains <arch>-gcc)
  - The <arch>/lib directory of the extracted MinGW ZIP
    (it contains libgcc*.DLL, needed for C++ tests during make check)
  - Visual C++ Express bin and IDE directories
  - The bin directory of the non-cross-compiling MinGW ZIP
    when building a 64bits zipball on a 32bits Windows
  - The bin directory of the findutils ZIP to find the "find" command
    (the Windows find command cannot be used)
- Examples of PATH (depends on where ZIPs were extracted and were Visual Studio was installed):
  - For a 32bits zipball:
    $ PATH=/c/hwloc/mingw32/bin:/c/hwloc/mingw32/i686-w64-mingw32/lib:”/c/Program Files/Microsoft Visual Studio 10.0/VC/bin”:”/c/Program Files/Microsoft Visual Studio 10.0/Common7/IDE”:$PATH
  - For a 64bits zipball:
    $ PATH=/c/hwloc/mingw64/bin:/c/hwloc/mingw64/x86_64-w64-mingw32/lib:”/c/Program Files/Microsoft Visual Studio 10.0/VC/bin”:”/c/Program Files/Microsoft Visual Studio 10.0/Common7/IDE”:$PATH
  - For a 64bits zipball on a 32bits Windows:
    $ PATH=/c/hwloc/mingw64/bin:/c/hwloc/mingw32/bin:/c/hwloc/mingw32/i686-w64-mingw32/lib:”/c/Program Files/Microsoft Visual Studio 10.0/VC/bin”:”/c/Program Files/Microsoft Visual Studio 10.0/Common7/IDE”:$PATH
- Check that running "lib", "link" and "cl" finds the right tools (installed by Visual Studio)
  and displays their usage output (list of command-line options).

- Download a hwloc tarball (building from SVN requires autotools, doxygen, LaTeX, etc.),
  extract it and enter the directory.

- Set the install prefix to what the zipball name must be:
  $ prefix=$PWD/hwloc-win<size>-build-<version>
- Configure
  - For a 32bits zipball:
    $ ./configure --prefix=$prefix --enable-static --host=i686-w64-mingw32
  - For a 64bits zipball:
    $ ./configure --prefix=$prefix --enable-static --host=x86_64-w64-mingw32
  - For a 64bits zipball on a 32bits Windows:
    $ ./configure --prefix=$prefix --enable-static --host=x86_64-w64-mingw32 CC_FOR_BUILD=i686-w64-mingw32-gcc

- Build
  $ make
- If not building a 64bits zipball on a 32bits machine, test things:
  $ make check
  If your Windows is not configured in English, some failure may occur in tests/xml
  because floats are localized.

- Install
  $ make install
- Create the zipball
  $ zip -r hwloc-win<size>-build-<version>.zip hwloc-win<size>-build-<version>

- Compare the contents of the new zipball with a previous one.
  Make sure the .lib file was generated.