@Talha Bin Azmat how have you done the installtion of xyce ? I have difficulty in installing Trilinos. Any help?

These are the notes I made on building Xyce on a Fedora system (library names will be different on systems like Ubuntu and Debian):

Building Xyce
-------------
2/14/2022:

------------------
Started at <http://xyce.sandia.gov|xyce.sandia.gov> web page, installation.

Installed in ~/src/.  After installation, directory ~/src/ has:

        Trilinos-trilinos-release-12-12-1
        Xyce-7.4
        XyceLibs
        Xyce_Docs-7.4

Installing prerequisites using yum install:

        blas-devel
        lapack-devel
        suitesparse-devel
        openmpi-devel

        NOTE: openmpi-devel puts a lot of executables in the path
        /usr/lib64/openmpi/bin without any links to them from
        standard places.  Create symbolic links as needed from
        /usr/bin/:

                mpicc
                mpic++
                mpif77
                mpicxx

        seemed to be sufficient.

Installing Trilinos:

        Make directory "build" and cd to it.
        Create "reconfigure" script from Xyce website how-to.
        Changed SRCDIR to point to $HOME/src/Trilinos-trilinos-...
        Changed ARCHDIR to point to $HOME/src/XyceLibs/Parallel

        Everything else the same.
        chmod a+x and run.
        After fixing the openmpi stuff mentioned above, it completed.

        Do:
                make
                make install

        (Install directory has been specified as local to my home
        directory, so does not need "sudo")

Building Xyce:
        cd Xyce-7.4
        ./bootstrap

Configuring Xyce to point to Trilinos install:
        mkdir build
        cd build

Like Trilinos, pick up the configure options from the website page
and drop them into a "reconfigure.sh" script and run that.

        ./reconfigure.sh

Hmm. . .  Says C++ compiler doesn't work?
        needed to add "mpicxx" to list above.

Also says iverilog not found (easily fixed, and needed at any rate)

        Iverilog obtained from <http://github.com/steveicarus|github.com/steveicarus>
        Running autoconf.sh required first installing "gperf".
        Now building.
        Installed, seems to be running properly.

Now Xyce succeeds in the reconfigure.  Continuing with make.

        Yay, success (apparently)!

NOTE:  Further builds done using the github source, not the 3-year-old
version 7.4, especially as those builds include updates for sky130
compatibility.

@Tim Edwards I have installed xyce. Could you tell how to use it in conjunction with xschem?

Generally, it works just like ngspice except that it doesn't understand a ".control" block, so you have to simplify the controls to basic analysis types. There are other minor issues which have been posted mostly on the #xyce channel.

@Tim Edwards The location of xyce is diffrent from that of xschem. So how can tell xschem about the location of xyce before running xschem?

Best to ask in the #xschem and #xyce channels.