Add a hack to emulate signbit() on 4.x. I hope this will fix build on 4.x and

work in a proper way.

Reported by:	pointyhat via kris

1 files changed, 22 insertions, 0 deletions

diff --git a/astro/xplanet/files/patch-src-libprojection-ProjectionIcosagnomonic.cpp b/astro/xplanet/files/patch-src-libprojection-ProjectionIcosagnomonic.cpp
new file mode 100644
index 000000000000..d4dcb61d798c
--- /dev/null
+++ b/astro/xplanet/files/patch-src-libprojection-ProjectionIcosagnomonic.cpp
@@ -0,0 +1,22 @@
+--- src/libprojection/ProjectionIcosagnomonic.cpp.orig	Tue Jun 14 22:10:36 2005
++++ src/libprojection/ProjectionIcosagnomonic.cpp	Wed Jun 29 20:11:58 2005
+@@ -26,6 +26,19 @@
+ #define THIGH 3
+ #define RATIO (((THIGH)*sqrt(3.0)/2)/(TWIDE))
+ 
++/* signbit() appaired only in FreeBSD 5.1, so we need this hack */
++#ifndef signbit
++static int
++signbit(double x)
++{
++
++	if ((x < 0.0) || (x = -0.0)) 
++		return 1;
++	else
++		return 0;
++}
++#endif /* signbit */
++
+ bool
+ ProjectionIcosagnomonic::PointXY::sameSide(const PointXY& p1,
+                                            const PointXY& p2,