1 files changed, 28 insertions, 1 deletions
diff --git a/common.h b/common.h
index 36ca06f..332e19a 100644
--- a/common.h
+++ b/common.h
@@ -5,7 +5,7 @@
 #include <math.h>
 
 
-#if __GNUC__
+#if defined(__GNUC__) && !defined(__clang__)
 # pragma GCC diagnostic ignored "-Wunsuffixed-float-constants"
 #endif
 
@@ -17,3 +17,30 @@
 
 void libtellurian_vincenty_inverse__(double latitude1, double longitude1, double latitude2, double longitude2,
                                      double *distance_out, double *azimuth1_out, double *azimuth2_out);
+
+#ifdef TEST
+# include <stdio.h>
+# include <stdlib.h>
+# if __GNUC__
+#  pragma GCC diagnostic ignored "-Wfloat-equal"
+# endif
+# define D180 M_PI
+# define D90 (M_PI / 2.0)
+# define D60 (M_PI / 3.0)
+# define D45 (M_PI / 4.0)
+# define D30 (M_PI / 6.0)
+# define ASSERT(ASSERTION)\
+	do {\
+		if (!(ASSERTION)) {\
+			fprintf(stderr, "Failed assertion at line %i: %s\n", __LINE__, #ASSERTION);\
+			exit(1);\
+		}\
+	} while (0)
+# if defined(__GNUC__)
+#  define TO\
+DO_TEST __attribute__((__const__)) int main(void) { return 0; }
+# else
+#  define TO\
+DO_TEST int main(void) { return 0; }
+# endif
+#endif