FreeBSD support

pkgs/development/libraries/db/clang-4.8.patch

@@ -0,0 +1,22 @@
+diff --git a/dbinc/atomic.h b/dbinc/atomic.h
+index 0034dcc..fa7ba93 100644
+--- a/dbinc/atomic.h
++++ b/dbinc/atomic.h
+@@ -144,7 +144,7 @@ typedef LONG volatile *interlocked_val;
+ #define	atomic_inc(env, p)	__atomic_inc(p)
+ #define	atomic_dec(env, p)	__atomic_dec(p)
+ #define	atomic_compare_exchange(env, p, o, n)	\
+-	__atomic_compare_exchange((p), (o), (n))
++	__db_atomic_compare_exchange((p), (o), (n))
+ static inline int __atomic_inc(db_atomic_t *p)
+ {
+ 	int	temp;
+@@ -176,7 +176,7 @@ static inline int __atomic_dec(db_atomic_t *p)
+  * http://gcc.gnu.org/onlinedocs/gcc-4.1.0/gcc/Atomic-Builtins.html
+  * which configure could be changed to use.
+  */
+-static inline int __atomic_compare_exchange(
++static inline int __db_atomic_compare_exchange(
+ 	db_atomic_t *p, atomic_value_t oldval, atomic_value_t newval)
+ {
+ 	atomic_value_t was;

pkgs/development/libraries/db/db-4.8.nix

@@ -2,6 +2,7 @@
 
 import ./generic.nix (args // rec {
   version = "4.8.30";
+  extraPatches = [ ./clang-4.8.patch ];
   sha256 = "0ampbl2f0hb1nix195kz1syrqqxpmvnvnfvphambj7xjrl3iljg0";
   branch = "4.8";
 })

pkgs/development/libraries/db/db-5.3.nix

@@ -3,6 +3,6 @@
 import ./generic.nix (args // rec {
   version = "5.3.28";
   sha256 = "0a1n5hbl7027fbz5lm0vp0zzfp1hmxnz14wx3zl9563h83br5ag0";
-  extraPatches = [ ./osx.patch ];
+  extraPatches = [ ./clang-5.3.patch ];
   branch = "5.3";
 })