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-rw-r--r--src/math/M_PI_4.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/math/M_PI_4.h b/src/math/M_PI_4.h
new file mode 100644
index 00000000..a20d16f1
--- /dev/null
+++ b/src/math/M_PI_4.h
@@ -0,0 +1,5 @@
+#include <math.h>
+#define M_PI_4 3.14159/4.0
+/*
+XOPEN(4)
+*/