nixpkgs/pkgs/development/libraries/db/darwin-mutexes.patch
Randy Eckenrode 38018514e8
db: fix build with clang 16 on Darwin
Both `_spin_lock_try` and `_spin_unlock` are private and deprecated
APIs, which are not exported by any headers in the SDK. The build fails
because the configure script does not define the functions before
calling them, which is treated as error by clang 16.

This patch replaces use of those APIs with `os_unfair_lock`, which is
the recommended replacement per the deprecation messages.
2023-07-02 17:46:15 -04:00

42 lines
1.4 KiB
Diff

diff -ur a/dist/aclocal/mutex.m4 b/dist/aclocal/mutex.m4
--- a/dist/aclocal/mutex.m4 1969-12-31 19:00:01.000000000 -0500
+++ b/dist/aclocal/mutex.m4 2023-06-05 19:14:47.214158196 -0400
@@ -441,10 +445,11 @@
# _spin_lock_try/_spin_unlock: Apple/Darwin
if test "$db_cv_mutex" = no; then
-AC_TRY_LINK(,[
- int x;
- _spin_lock_try(&x);
- _spin_unlock(&x);
+AC_TRY_LINK([
+#include <os/lock.h>],[
+ os_unfair_lock x = OS_UNFAIR_LOCK_INIT;
+ bool _ = os_unfair_lock_trylock(&x);
+ os_unfair_lock_unlock(&x);
], [db_cv_mutex=Darwin/_spin_lock_try])
fi
diff -ur a/src/dbinc/mutex_int.h b/src/dbinc/mutex_int.h
--- a/src/dbinc/mutex_int.h 1969-12-31 19:00:01.000000000 -0500
+++ b/src/dbinc/mutex_int.h 2023-06-05 19:15:37.510514745 -0400
@@ -154,14 +154,13 @@
* Apple/Darwin library functions.
*********************************************************************/
#ifdef HAVE_MUTEX_DARWIN_SPIN_LOCK_TRY
-typedef u_int32_t tsl_t;
+#include <os/lock.h>
+typedef os_unfair_lock tsl_t;
#ifdef LOAD_ACTUAL_MUTEX_CODE
-extern int _spin_lock_try(tsl_t *);
-extern void _spin_unlock(tsl_t *);
-#define MUTEX_SET(tsl) _spin_lock_try(tsl)
-#define MUTEX_UNSET(tsl) _spin_unlock(tsl)
-#define MUTEX_INIT(tsl) (MUTEX_UNSET(tsl), 0)
+#define MUTEX_SET(tsl) os_unfair_lock_trylock(tsl)
+#define MUTEX_UNSET(tsl) os_unfair_lock_unlock(tsl)
+#define MUTEX_INIT(tsl) ({ *(tsl) = OS_UNFAIR_LOCK_INIT; tsl; })
#endif
#endif