patch 9.0.1971: macOS: FEAT_SOUND guard too restrictive

Problem:  macOS: FEAT_SOUND guard too restrictive
Solution: check for older macOS support properly

Fix macOS FEAT_SOUND guards to be less restrictive

This allows +sound to work on older macOS platforms again. The +sound
implementation uses APIs available in 10.6, but the code itself uses
generics with type parameters which was only added in Xcode 7 / clang 7,
which was released for macOS 10.11. This means as long as Vim is
compiled under 10.11+, and using a deployment target >= 10.6, the
feature will work.

closes: #13251

Signed-off-by: Christian Brabandt <[email protected]>
Co-authored-by: Yee Cheng Chin <[email protected]>

Author: ychin

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1971,
 /**/
     1970,
 /**/

src/vim.h

@@ -173,8 +173,8 @@
 #  define FEAT_CLIPBOARD
 # endif
 # if defined(FEAT_HUGE) && !defined(FEAT_SOUND) && \
-   defined(MAC_OS_X_VERSION_MIN_REQUIRED) && \
-    MAC_OS_X_VERSION_MIN_REQUIRED >= 101100
+	defined(__clang_major__) && __clang_major__ >= 7 && \
+	defined(MAC_OS_X_VERSION_MIN_REQUIRED) && MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
 #  define FEAT_SOUND
 # endif
 # if defined(FEAT_SOUND)