X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=moebius2.git;a=blobdiff_plain;f=common.h;h=6414303ad755c8234366e5990e450441f2b2dbd7;hp=a11f5660a6b7d4e8d88ef630c67b9521398a27e3;hb=30d841cc8a4e2ae0bec21b58e3c73057e4286f06;hpb=ca6581b23c843e3117d3450a4ecf13bd6b71b8a5;ds=sidebyside

diff --git a/common.h b/common.h
index a11f566..6414303 100644
--- a/common.h
+++ b/common.h
@@ -8,6 +8,9 @@
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
+#ifndef _XOPEN_SOURCE
+#define _XOPEN_SOURCE 1000
+#endif
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -40,7 +43,8 @@ double magnD2(const double pq[D3]);
 void xprod(double r[D3], const double a[D3], const double b[D3]);
 double dotprod(const double a[D3], const double b[D3]);
 void xprod_norm(double r[D3], const double a[D3], const double b[D3],
-		double absepsilon, double one);
+		double one, double absepsilon);
+void normalise(double v[D3], double one, double absepsilon);
 
 void flushoutput(void);
 void diee(const char *what);