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-rw-r--r--source4/lib/replace/replace.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/source4/lib/replace/replace.h b/source4/lib/replace/replace.h
index 7d6dcec7f1..959d44b33e 100644
--- a/source4/lib/replace/replace.h
+++ b/source4/lib/replace/replace.h
@@ -79,6 +79,29 @@
#include <stddef.h>
#endif
+/**
+ this is a warning hack. The idea is to use this everywhere that we
+ get the "discarding const" warning from gcc. That doesn't actually
+ fix the problem of course, but it means that when we do get to
+ cleaning them up we can do it by searching the code for
+ discard_const.
+
+ It also means that other error types aren't as swamped by the noise
+ of hundreds of const warnings, so we are more likely to notice when
+ we get new errors.
+
+ Please only add more uses of this macro when you find it
+ _really_ hard to fix const warnings. Our aim is to eventually use
+ this function in only a very few places.
+
+ Also, please call this via the discard_const_p() macro interface, as that
+ makes the return type safe.
+*/
+#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
+
+/** Type-safe version of discard_const */
+#define discard_const_p(type, ptr) ((type *)discard_const(ptr))
+
#ifndef HAVE_STRERROR
extern char *sys_errlist[];
#define strerror(i) sys_errlist[i]