Fix -Werror,-Wmacro-redefined in limits.h

Those macros are also defined by the compiler-provided float.h which will be included later on (at least in the FreeBSD buildworld case) and triggers these -Werror warnings. Including <float.h> first and only defining the macros when DBL_DIG/FLT_DIG is missing fixes this problem. Reviewed-by: Ryan Moeller <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Alex Richardson <[email protected]> Closes #10864
openzfs · Sep 1, 2020 · 417e646 · 417e646
1 parent 964791a
commit 417e646
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/lib/libspl/include/limits.h b/lib/libspl/include/limits.h
@@ -25,16 +25,21 @@
  */
 
 #include_next <limits.h>
+#include <float.h>
 
 #ifndef _LIBSPL_LIMITS_H
 #define	_LIBSPL_LIMITS_H
 
+#ifndef DBL_DIG
 #define	DBL_DIG		15
 #define	DBL_MAX		1.7976931348623157081452E+308
 #define	DBL_MIN		2.2250738585072013830903E-308
+#endif
 
+#ifndef FLT_DIG
 #define	FLT_DIG		6
 #define	FLT_MAX		3.4028234663852885981170E+38F
 #define	FLT_MIN		1.1754943508222875079688E-38F
+#endif
 
 #endif /* _LIBSPL_LIMITS_H */