diff options
Diffstat (limited to 'src/geodesic.c')
| -rw-r--r-- | src/geodesic.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/geodesic.c b/src/geodesic.c index 5504cb3b..887edb42 100644 --- a/src/geodesic.c +++ b/src/geodesic.c @@ -23,8 +23,19 @@ * https://geographiclib.sourceforge.io/ */ +/* The PROJ_COMPILATION flag indicates that this is part of the compilation of + * the PROJ library (keyed off the presence of the PROJ_LIB macro which points + * to the data directory for PROJ). If this is set, we use the PROJ supplied + * implementations of the C99 math functions instead of the ones defined here. + */ +#if defined(PROJ_LIB) +#define PROJ_COMPILATION 1 +#else +#define PROJ_COMPILATION 0 +#endif + #include "geodesic.h" -#ifdef PJ_LIB__ +#if PROJ_COMPILAION #include "proj_math.h" #else #include <math.h> @@ -122,7 +133,7 @@ enum captype { }; static real sq(real x) { return x * x; } -#if HAVE_C99_MATH +#if HAVE_C99_MATH || PROJ_COMPILATION #define atanhx atanh #define copysignx copysign #define hypotx hypot |