diff options
Diffstat (limited to 'subsurface-core/units.h')
| -rw-r--r-- | subsurface-core/units.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/subsurface-core/units.h b/subsurface-core/units.h index 1273bd9bb..9d1b0fc8c 100644 --- a/subsurface-core/units.h +++ b/subsurface-core/units.h @@ -2,6 +2,9 @@ #define UNITS_H #include <math.h> +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif #ifdef __cplusplus extern "C" { |