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-rw-r--r--src/H5private.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/H5private.h b/src/H5private.h
index bc6c8a5..c3375df 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -540,6 +540,21 @@
# define H5_DEC_ENUM(TYPE,VAR) (VAR)=((TYPE)((VAR)-1))
#endif
+/* Double constant wrapper
+ *
+ * Quiets gcc warnings from -Wunsuffixed-float-constants.
+ *
+ * This is a really annoying warning since the standard specifies that
+ * constants of type double do NOT get a suffix so there's no way
+ * to specify a constant of type double. To quiet gcc, we specify floating
+ * point constants as type long double and cast to double.
+ *
+ * Note that this macro only needs to be used where using a double
+ * is important. For most code, suffixing constants with F will quiet the
+ * compiler and not produce erroneous code.
+ */
+#define H5_DOUBLE(S) ((double) S ## L)
+
/*
* Methods to compare the equality of floating-point values:
*