BUILD: fix build warning on solaris based systems with __maybe_unused.
__maybe_unused is already defined there.
diff --git a/include/haproxy/compiler.h b/include/haproxy/compiler.h
index 49356da..a935ac3 100644
--- a/include/haproxy/compiler.h
+++ b/include/haproxy/compiler.h
@@ -58,10 +58,12 @@
#endif
#endif
+#ifndef __maybe_unused
/* silence the "unused" warnings without having to place painful #ifdefs.
* For use with variables or functions.
*/
#define __maybe_unused __attribute__((unused))
+#endif
/* These macros are used to declare a section name for a variable.
* WARNING: keep section names short, as MacOS limits them to 16 characters.