This package assumes the existence of a POSIX shell in /bin/sh. On Solaris, /bin/sh is not POSIX. Most versions of Solaris provide a POSIX shell in /usr/xpg4/bin/sh. To compile this package on Solaris, you will need to run ./patch-for-solaris before you run ./configure. This script will change the #! invocation of the configure script and various tools so that a POSIX shell is used for the compilation process.