Enforce -Werror in tests.

src/header/bits_pthread/cbindgen.toml

@@ -17,8 +17,8 @@ after_includes = """
     void *arg; \
     void *prev; \
   } __relibc_internal_pthread_ll_entry = { \
-    .routine = (routine), \
-    .arg = (arg), \
+    .routine = (void (*)(void *))(routine), \
+    .arg = (void *)(arg), \
   }; \
   __relibc_internal_pthread_cleanup_push(&__relibc_internal_pthread_ll_entry);
 

src/header/signal/mod.rs

@@ -22,10 +22,10 @@ pub mod sys;
 
 type SigSet = BitSet<[c_ulong; 1]>;
 
-pub const SIG_DFL: usize = 0;
-pub const SIG_IGN: usize = 1;
-pub const SIG_ERR: isize = -1;
-pub const SIG_HOLD: isize = 2;
+pub(crate) const SIG_DFL: usize = 0;
+pub(crate) const SIG_IGN: usize = 1;
+pub(crate) const SIG_ERR: isize = -1;
+pub(crate) const SIG_HOLD: isize = 2;
 
 pub const SIG_BLOCK: c_int = 0;
 pub const SIG_UNBLOCK: c_int = 1;