On Saturday 19 May 2007, Joerg Sonnenberger wrote: > Change the code to use a global variable as argument like: > > #include <math.h> > > double foo; > > int main() > { > return isinf(foo); > } The configure test in 3.5.7 uses: #include <math.h> int main () { float f = 0.0; isinf(f) ; return 0; } cheers mark