Add #include <math.h> for fabs()

diff --git a/src/Airports/runways.cxx b/src/Airports/runways.cxx
index bbc617a73e8ecbd767b862353c0d8a0c10d9c202..448881ed238f4c9624140187f3c44807f3e69334 100644 (file)
--- a/src/Airports/runways.cxx
+++ b/src/Airports/runways.cxx
@@ -25,6 +25,7 @@
 #  include <config.h>
 #endif
 
+#include <math.h>               // fabs()
 #include <stdio.h>              // sprintf()
 
 #include <simgear/compiler.h>