I just had to build the QuickFIX C++ client library on Solaris, and here are a few notes that might be useful when doing the same:
* Make sure you have /usr/ccs/bin in your PATH (so that ar can be found);
* If you are using gmake, you may need to export MAKE=gmake before you run configure.
* If building static libs as well as .so files, run configure --enable-shared=yes.
Once the libraries are built, you can compile and link using:
$ g++ -I /usr/local/include/quickfix/include/ main.cpp libquickfix.a -o main -lxml2
This will statically compile against quickfix and dynamically link against libxml2.