Simplify stub pthread library. NFC

The dylink_all test contains a few extra functions that were previously
just not included.

Author: sbc100

system/lib/pthread/library_pthread_stub.c

@@ -55,6 +55,8 @@ void __lock(void* ptr) {}
 
 void __unlock(void* ptr) {}
 
+void __inhibit_ptc() {}
+
 void __acquire_ptc() {}
 
 void __release_ptc() {}

test/codesize/test_codesize_hello_dylink_all.json

@@ -1,7 +1,7 @@
 {
   "a.out.js": 267889,
-  "a.out.nodebug.wasm": 587151,
-  "total": 855040,
+  "a.out.nodebug.wasm": 587563,
+  "total": 855452,
   "sent": [
     "IMG_Init",
     "IMG_Load",
@@ -3206,6 +3206,7 @@
     "pthread_detach",
     "pthread_equal",
     "pthread_exit",
+    "pthread_getattr_default_np",
     "pthread_getattr_np",
     "pthread_getconcurrency",
     "pthread_getcpuclockid",
@@ -3230,6 +3231,7 @@
     "pthread_mutexattr_init",
     "pthread_mutexattr_setprotocol",
     "pthread_mutexattr_setpshared",
+    "pthread_mutexattr_setrobust",
     "pthread_mutexattr_settype",
     "pthread_once",
     "pthread_rwlock_destroy",
@@ -3246,6 +3248,7 @@
     "pthread_rwlockattr_init",
     "pthread_rwlockattr_setpshared",
     "pthread_self",
+    "pthread_setattr_default_np",
     "pthread_setcancelstate",
     "pthread_setcanceltype",
     "pthread_setconcurrency",
@@ -4960,6 +4963,7 @@
     "$pthread_condattr_setclock",
     "$pthread_condattr_setpshared",
     "$pthread_equal",
+    "$pthread_getattr_default_np",
     "$pthread_getattr_np",
     "$pthread_getcpuclockid",
     "$pthread_getspecific",
@@ -4970,8 +4974,10 @@
     "$pthread_mutexattr_gettype",
     "$pthread_mutexattr_setprotocol",
     "$pthread_mutexattr_setpshared",
+    "$pthread_mutexattr_setrobust",
     "$pthread_mutexattr_settype",
     "$pthread_rwlockattr_init",
+    "$pthread_setattr_default_np",
     "$pthread_setspecific",
     "$pthread_sigmask",
     "$pthread_spin_init",

tools/system_libs.py

@@ -1247,73 +1247,30 @@ def get_files(self):
             'pthread_self_stub.c',
             'proxying_stub.c',
           ])
+
+        for pat in ('pthread_*attr*.c',
+                    'pthread_spin*.c',
+                    # C11 thread library functions
+                    'cnd_*.c',
+                    'mtx_*.c',
+                    'tss_*.c',
+                    'thrd_*.c'):
+          libc_files += glob_in_path('system/lib/libc/musl/src/thread', pat)
+
         libc_files += files_in_path(
           path='system/lib/libc/musl/src/thread',
           filenames=[
             'pthread_self.c',
             'pthread_cleanup_push.c',
-            'pthread_attr_init.c',
-            'pthread_attr_destroy.c',
-            'pthread_attr_get.c',
-            'pthread_attr_setdetachstate.c',
-            'pthread_attr_setguardsize.c',
-            'pthread_attr_setinheritsched.c',
-            'pthread_attr_setschedparam.c',
-            'pthread_attr_setschedpolicy.c',
-            'pthread_attr_setscope.c',
-            'pthread_attr_setstack.c',
-            'pthread_attr_setstacksize.c',
-            'pthread_barrierattr_destroy.c',
-            'pthread_barrierattr_init.c',
-            'pthread_barrierattr_setpshared.c',
-            'pthread_condattr_destroy.c',
-            'pthread_condattr_init.c',
-            'pthread_condattr_setpshared.c',
-            'pthread_condattr_setclock.c',
-            'pthread_mutexattr_destroy.c',
-            'pthread_mutexattr_init.c',
-            'pthread_mutexattr_setprotocol.c',
-            'pthread_mutexattr_settype.c',
-            'pthread_mutexattr_setpshared.c',
-            'pthread_rwlockattr_destroy.c',
-            'pthread_rwlockattr_init.c',
-            'pthread_rwlockattr_setpshared.c',
-            'pthread_getattr_np.c',
             'pthread_getconcurrency.c',
             'pthread_getcpuclockid.c',
             'pthread_getschedparam.c',
-            'pthread_spin_destroy.c',
-            'pthread_spin_init.c',
-            'pthread_spin_lock.c',
-            'pthread_spin_trylock.c',
-            'pthread_spin_unlock.c',
             'pthread_setschedprio.c',
             'pthread_setconcurrency.c',
             'default_attr.c',
-            # C11 thread library functions
             'call_once.c',
-            'tss_create.c',
-            'tss_delete.c',
-            'tss_set.c',
-            'cnd_broadcast.c',
-            'cnd_destroy.c',
-            'cnd_init.c',
-            'cnd_signal.c',
-            'cnd_timedwait.c',
-            'cnd_wait.c',
-            'mtx_destroy.c',
-            'mtx_init.c',
-            'mtx_lock.c',
-            'mtx_timedlock.c',
-            'mtx_trylock.c',
-            'mtx_unlock.c',
             'sem_destroy.c',
             'sem_init.c',
-            'thrd_create.c',
-            'thrd_exit.c',
-            'thrd_join.c',
-            'thrd_sleep.c',
-            'thrd_yield.c',
           ])
 
     if self.is_mt or self.is_ww: