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Revision 1.14


__General cross-compiler__

A complete cross-compiler can be set up easily. For example:

    $ cd binutils-2.18
    $ ./configure --target=mips-netbsdelf
    $ make&& make install
    $ cd ../pcc
    $ ./configure --target=mips-netbsdelf
    $ make&& make install

The compiler from the above example is called /usr/local/bin/mips-netbsdelf-pcc.

Copying the header files from the target machine into /usr/local/mips-netbsdelf/include and the libraries into /usr/local/mips-netbsdelf/lib is sufficient to build binaries.

It's possible for multiple cross-compilers to exist on the host system at the same time (which was the motivation for doing this!).

__Cross-compiler to Microsoft Windows__

Building a cross-compiler for Windows follows a similar process to the
above; however be aware that using pcc to generate '.exe' executables is best
described as a 'work in progress' at the present time.  Specifically, pcc is
unable to compile the support libraries for either itself or the Windows
runtime, so the gcc cross-compiler needs to be installed and used for this.
Also, pcc cannot currently parse the #pragma's included by "windows.h", which
means that you're pretty much limited to compiling console programs.

It is hoped that these issues can be resolved and these build instructions
are provided to outline the steps needed in creating a cross-compiler, and to
assist as a test case for anticipated compiler fixes.  You will need header
files and libraries for Windows; these files are maintained by the MinGW
project. You can find pcc-supported source and binary tarballs of these
libraries [on the pcc website](http://pcc.ludd.ltu.se/ftp/pub/win32/) and in
addition you will need [binutils](http://ftp.gnu.org/gnu/binutils/).  These
instructions will create a cross-compiler called
'/usr/local/bin/i386-pe-pcc' with all includes and libraries in
'/usr/local/i386-pe'.  (Root password is required for the installation
steps; if you are a 'sudo' user replace *su -c 'make install'* with *sudo
make install* in the examples.)

 - Stage 1: Prerequisites to give five directories named 'binutils', 'mingw32',
'pcc', 'pcc-libs' and 'w32api' (assumes cvs is installed, if not then
pcc/pcc-libs are available as [source
snapshots](http://pcc.ludd.ltu.se/ftp/pub/pcc-beta/)):

        mkdir pcc-win32 ; cd pcc-win32
        tar -zxf binutils-2.21.tar.gz ; mv binutils-2.21/ binutils
        tar -zxf mingw-runtime-3.14pcc-src.tar.gz ; mv mingw-runtime-3.14/ mingw32
        tar -zxf w32api-3.11pcc-src.tar.gz ; mv w32api-3.11/ w32api
        cvs -d :pserver:anonymous@pcc.ludd.ltu.se:/cvsroot co pcc
        cvs -d :pserver:anonymous@pcc.ludd.ltu.se:/cvsroot co pcc-libs

 - Stage 2: Build the pcc cross-compiler and necessary tools (assembler/linker
etc.) with options set for pcc to look in '/usr/local/i386-pe/include' when
compiling as we don't want to use the host system includes in this case:

        cd binutils
        ./configure --target=i386-pe
        make
        su -c 'make install'
        cd ../pcc
        ./configure --target=i386-pe --with-incdir=/usr/local/i386-pe/include/ \
          --with-libdir=/usr/local/i386-pe/lib
        make CC=pcc
        su -c 'make install'

 - Stage 3: Build the support libraries.  As mentioned, these must currently
all be compiled with gcc; change the '/usr/bin/i686-pc-mingw32-gcc' below to
the name of your cross-compiler executable.  Also, note that 'short name'
versions of the binutils have been installed to '/usr/local/i386-pe/bin/',
and we need these on $PATH ahead of the host defaults AFTER 'configure' has
been run for each build directory.

        cd ../pcc-libs ; ./configure --target=i386-pe
        cd ../mingw32 ; ./configure --target=i386-pe --prefix=/usr/local/i386-pe/
        cd ../w32api ; ./configure --target=i386-pe --prefix=/usr/local/i386-pe/
        export PATH="/usr/local/i386-pe/bin/:$PATH"
        export CCROSS=/usr/bin/i686-pc-mingw32-gcc
        cd ../pcc-libs
        make CC=$CCROSS PCCLIBDIR=/usr/local/i386-pe/lib/ PCCINCDIR=/usr/local/i386-pe/include/
        su -c 'make install PCCLIBDIR=/usr/local/i386-pe/lib/ PCCINCDIR=/usr/local/i386-pe/include/'
        cd ../mingw32
        make CC=$CCROSS
        su -c 'make install'
        cd ../w32api
        make CC=$CCROSS
        su -c 'make install'

And that's it!  You should now be able to run 'i386-pe-pcc' to compile
simple (console) programs, which will invoke only 'i386-pe-as' and
'i386-pe-ld' (you may wish to open a new shell because of your altered $PATH):

        i386-pe-pcc -o /tmp/helloworld.exe /tmp/hellow.c

Be sure to check status of pragma support in pcc on [the bug tracking
system](http://pcc.ludd.ltu.se/jira) and changes to the MinGW release files
before submitting bugs for this build.


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