commit bd89d4406327d3a30517443a4a518f49ebc99368
author ola.soder@axis.com <ola.soder@axis.com> Fri Feb 11 19:27:55 2022 +0000
committer Bram Moolenaar <Bram@vim.org> Fri Feb 11 19:27:55 2022 +0000
tree 4ce9a02abd758ab964130f1e93fd72efbb5dbe0d
parent 481acb11413a436653e235d2098990b2ad47d195

patch 8.2.4347: in some build setups UNUSED is not defined

Problem:    In some build setups UNUSED is not defined.
Solution:   Change the logic of how UNUSED is defined. (Ola Söder,
            closes #9734)

src/vim.h

diff --git a/src/vim.h b/src/vim.h
index 166edf5..4f95bb4 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -245,12 +245,19 @@
 
 // Mark unused function arguments with UNUSED, so that gcc -Wunused-parameter
 // can be used to check for mistakes.
-#if defined(HAVE_ATTRIBUTE_UNUSED) || defined(__MINGW32__)
-# if !defined(UNUSED)
+#ifndef UNUSED
+# if defined(HAVE_ATTRIBUTE_UNUSED) || defined(__MINGW32__)
 #  define UNUSED __attribute__((unused))
+# else
+#  if defined __has_attribute
+#   if __has_attribute(unused)
+#    define UNUSED __attribute__((unused))
+#   endif
+#  endif
 # endif
-#else
-# define UNUSED
+# ifndef UNUSED
+#  define UNUSED
+# endif
 #endif
 
 // Used to check for "sun", "__sun" is used by newer compilers.