Fails to build on Solaris

Another error:

     g++ -DHAVE_CONFIG_H -I../.. -I../../src -I../.. -I../../src -g -O3 -Wall -Wwrite-strings -Woverloaded-virtual -MT gadgets.o -MD -MP -MF .deps/gadgets.Tpo -c -o gadgets.o gadgets.cc
     gadgets.cc: In function 'double xceil(double, double)':
     gadgets.cc:32:41: error: 'ceilf' was not declared in this scope
     gadgets.cc:47:1: warning: control reaches end of non-void function

Polygraph checks if ceilf(3) is available on the system. Apparently, Solaris has ceilf(3) implemented (that is why the configure check succeeds), but does not declare it in math.h. Attached patch is a workaround to avoid ceilf(3) usage.

And one more:

        g++ -DHAVE_CONFIG_H -I../.. -I../../src -I../.. -I../../src -g -O3 -Wall -Wwrite-strings -Woverloaded-virtual -MT PolyApp.o -MD -MP -MF .deps/PolyApp.Tpo -c -o PolyApp.o PolyApp.cc
        /usr/include/net/if.h:99: error: template argument required for struct map

Solaris declares/refers common names like map in /usr/include/net/if.h and queue in /usr/include/sys/stream.h. These conflict with C++. Looks like the only option to fix this is to get rid of "using namespace std".

Easier workaround is to include <net/if.h> *before* any other headers, especially <map> :-)