Fix -Wmissing-variable-declarations warnings for float.c special case

This adds extern declarations for the global variables defined in
float.c but not meant for external use.  This is a workaround to be
able to add -Wmissing-variable-declarations to the global set of
warning options in the near future.

Reviewed-by: Andres Freund <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/e0a62134-83da-4ba4-8cdb-ceb0111c95ce@eisentraut.org

diff --git a/src/backend/utils/adt/float.c b/src/backend/utils/adt/float.c
index cbbb8aecafcc7656451d1d04da2c148a446561a9..f709c21e1fe3636221259abbd06161fbf521a3da 100644 (file)
--- a/src/backend/utils/adt/float.c
+++ b/src/backend/utils/adt/float.c
@@ -55,7 +55,15 @@ static float8 cot_45 = 0;
  * be referenced by other files, much less changed; but we don't want the
  * compiler to know that, else it might try to precompute expressions
  * involving them.  See comments for init_degree_constants().
- */
+ *
+ * The additional extern declarations are to silence
+ * -Wmissing-variable-declarations.
+ */
+extern float8 degree_c_thirty;
+extern float8 degree_c_forty_five;
+extern float8 degree_c_sixty;
+extern float8 degree_c_one_half;
+extern float8 degree_c_one;
 float8     degree_c_thirty = 30.0;
 float8     degree_c_forty_five = 45.0;
 float8     degree_c_sixty = 60.0;