GNU GCC Compiler 3.0.4 for Intel DG/UX Release R4.20MU07

     These binaries should go to /usr/local. Create a filesystem
     under the dir /usr/local/ and untar this file inside there. 
     Usually in a DG/UX system /usr/local is an empty directory.

     Please note: Unfortunately this GCC version doesnt compile with
     the DG/UX native assembler (as). You should use with C++ the  
     GNU as (formely known as "gas").
     It is strobgly recommended also that you use the GNU linker ld.
     These are both included!
      
     Next do:
     cd /usr/bin
     cp as as.ORIG
     cp ld ld.ORIG           (backup the native DG/UX as,ld tools)

     cd /usr/local/bin
     cp gas     /usr/bin/as   (copy the GNU assembler)
     cp gnu-ld  /usr/bin/ld   (copy the GNU linker)

     Remember that when you are building a new DG/UX kernel you are
     required to use the the native DG/UX linker. It doesnt matter 
     which assembler you are using but the linker must be the native 
     one! So before you build a new kernel using DG/UX's "sysadm"  
     dont forget to perform it's restoration: 
     cd /usr/bin
     cp ld.ORIG ld
     i.e. *restore* the native DG/UX linker (ld).

     In general remember that C++ for GCC 3.0.4 requires GNU linker
     And for the GNU assember you must specify the flag -mno-legend 
     if you are not going to use the mxdb to debug (eg use gdb).

     Also "-gstabs+ -mno-legend -O2" is usually the debug flags that
     you should use for C++ (with the GNU assember of course).

     Next set up the crt* files:

     cd /usr/sde/ix86dgux/usr/lib
     cp crt1.o gcc-2
     cp crti.o gcc-2
     cp crtn.o gcc-2
     rm crt1.o crti.o crtn.o
     ln -s gcc/crt1.o crt1.o
     ln -s gcc/crti.o crti.o
     ln -s gcc/crtn.o crtn.o
 
     Finally install GCC 3.0.4 to DG/UX's elink:
     cd /usr/local
     cp -r gcc-dgux-304   /usr/sde/ix86dgux/usr/lib
     cp -r gcc-dgux-304   /usr/opt/sdk/sde/ix86dgux/usr/lib
     cd /usr/sde/ix86dgux/usr/lib
     rm gcc
     ln -s gcc-dgux-304  gcc
     cd /usr/opt/sdk/sde/ix86dgux/usr/lib
     rm gcc
     ln -s gcc-dgux-304  gcc

     Needless to say that you should add to your path the /usr/local/bin
     and to your LD_LIBRARY_PATH the /usr/local/lib. 
     Then relogin!

     To go back to your old GCC-2.7.2.9 compiler: 
     cd /usr/sde/ix86dgux/usr/lib
     rm gcc
     rm -r gcc-dgux-304
     ln -s gcc-2 gcc
     cd /usr/opt/sdk/sde/ix86dgux/usr/lib
     rm gcc
     rm -r gcc-dgux-304
     ln -s gcc-2 gcc
     cd /usr/bin
     cp as.ORIG as
     cp ld.ORIG ld

    and finally take out /usr/local/bin from your path, and relogin!

     IMPORTANT COMMENT:Do NOT erase cc from /usr/bin. The sysadm uses cc
     for building the DG/UX kernels! 
     Also the libgcc.a in /usr/lib is used to build kernels. Do not remove
     this library from /usr/lib.

     ===
     Takis,
     Cambridge , March 5, 2002

     Takis Psarogiannakopoulos
     University of Cambridge
     Centre for Mathematical Sciences
     Department of Pure Mathematics
     Wilberforce Road
     Cambridge CB3 0WB ,UK , <takis@XFree86.Org>
     March 2002


     You can find more tools (plus gdb-5.1 and many others) by doing:
     ftp ftp.dpmms.cam.ac.uk (University of Cambridge, UK, Department
                              of Pure Mathematics)
     login: ftp
     password: your email address
     cd /pub/takis
     bin                     (set binary ftp tranfers)
     get DGUX-R420MU07-DEVTOOLS.tar.gz
     quit
     Create a filesystem with sysadm mounted under /usr/local (usually
     an empty directory in DG/UX systems).
     cp DGUX-R420MU07-DEVTOOLS.tar.gz /usr
     cd /usr
     gzip -d < DGUX-R420MU07-DEVTOOLS.tar.gz | tar xvf -

     Put /usr/local/bin in your path and /usr/local/lib in your 
     LD_LIBRARY_PATH, export them and relogin allowing changes to take effect
     Beware that DGUX-R420MU07-DEVTOOLS.tar.gz contains GCC-2.95.3 so if you
     untar it above the GCC-3.0.4 will wipe out your latest 3.0.4 binaries in
     favor of the older 2.95.3.