ISSM sometime has issues locating libpython and gives the following message during configuration
checking for Python library libpython... configure: error: libpython not found! Please locate this file and contact ISSM developers via forum or email.
This can be solved by checking that your libpython path is included in trunk/m4/issm_options.m4. If it is not included you should add a alternative to the libpython check (around line 820, block starting with AC_MSG_CHECKING([for Python library libpython])"
. Check the syntax of other alternative and add yours as needed.
You then need to run autoreconf and carry on with the instalation