Split the pthread library out of libc

embuilder.py

@@ -113,7 +113,8 @@
     'crtbegin',
     'libsanitizer_common_rt',
     'libubsan_rt',
-    'libwasm_workers_stub-debug',
+    'libwasm_workers-debug-stub',
+    'libpthread-debug-stub',
     'libfetch',
     'libfetch-mt',
     'libwasmfs',

test/other/codesize/test_codesize_minimal_pthreads.funcs

@@ -1,5 +1,5 @@
+$__emscripten_stdout_close
 $__emscripten_stdout_seek
-$__errno_location
 $__memcpy
 $__memset
 $__pthread_getspecific
@@ -67,6 +67,7 @@ $em_task_queue_free
 $em_task_queue_is_empty
 $emscripten_builtin_free
 $emscripten_builtin_malloc
+$emscripten_builtin_memalign
 $emscripten_current_thread_process_queued_calls
 $emscripten_futex_wait
 $emscripten_futex_wake
@@ -80,7 +81,6 @@ $init_mparams
 $lock
 $main
 $nodtor
-$pthread_attr_destroy
 $pthread_cond_signal
 $pthread_mutex_destroy
 $pthread_setspecific

test/other/codesize/test_codesize_minimal_pthreads.size

@@ -1 +1 @@
-19480
+19950

test/test_core.py

@@ -4625,10 +4625,10 @@ def test_dylink_postsets_chunking(self):
 
   @with_dylink_reversed
   @parameterized({
-    'libcxx': ('libc,libc++,libmalloc,libc++abi',),
+    'libcxx': ('libc,libpthread,libc++,libmalloc,libc++abi',),
     'all': ('1',),
-    'missing': ('libc,libmalloc,libc++abi', False, False, False),
-    'missing_assertions': ('libc,libmalloc,libc++abi', False, False, True),
+    'missing': ('libc,libpthread,libmalloc,libc++abi', False, False, False),
+    'missing_assertions': ('libc,libpthread,libmalloc,libc++abi', False, False, True),
   })
   def test_dylink_syslibs(self, syslibs, expect_pass=True, with_reversed=True, assertions=True):
     # one module uses libcxx, need to force its inclusion when it isn't the main

test/test_other.py

@@ -6007,9 +6007,9 @@ def test_bad_lookup(self):
     # partial list, but ok since we grab them as needed
     'parial': [{'EMCC_FORCE_STDLIBS': 'libc++'}, False],
     # fail! not enough stdlibs
-    'partial_only': [{'EMCC_FORCE_STDLIBS': 'libc++,libc,libc++abi', 'EMCC_ONLY_FORCED_STDLIBS': '1'}, True],
+    'partial_only': [{'EMCC_FORCE_STDLIBS': 'libc++,libc,libpthread,libc++abi', 'EMCC_ONLY_FORCED_STDLIBS': '1'}, True],
     # force all the needed stdlibs, so this works even though we ignore the input file
-    'full_only': [{'EMCC_FORCE_STDLIBS': 'libc,libc++abi,libc++,libmalloc', 'EMCC_ONLY_FORCED_STDLIBS': '1'}, False],
+    'full_only': [{'EMCC_FORCE_STDLIBS': 'libc,libpthread,libc++abi,libc++,libmalloc', 'EMCC_ONLY_FORCED_STDLIBS': '1'}, False],
   })
   def test_only_force_stdlibs(self, env, fail):
     cmd = [EMXX, test_file('hello_libcxx.cpp')]
@@ -6040,7 +6040,7 @@ def test_only_force_stdlibs_2(self):
   }
 }
 ''')
-    with env_modify({'EMCC_FORCE_STDLIBS': 'libc,libc++abi,libc++,libmalloc', 'EMCC_ONLY_FORCED_STDLIBS': '1'}):
+    with env_modify({'EMCC_FORCE_STDLIBS': 'libc,libpthread,libc++abi,libc++,libmalloc', 'EMCC_ONLY_FORCED_STDLIBS': '1'}):
       self.run_process([EMXX, 'src.cpp', '-sDISABLE_EXCEPTION_CATCHING=0'])
     self.assertContained('Caught exception: std::exception', self.run_js('a.out.js'))
 
@@ -12286,10 +12286,10 @@ def test_nostdlib(self):
     self.assertContained(err, self.expect_fail([EMCC, test_file('unistd/close.c'), '-nodefaultlibs']))
 
     # Build again but with explit system libraries
-    libs = ['-lc', '-lcompiler_rt']
+    libs = ['-lc', '-lpthread', '-lcompiler_rt']
     self.run_process([EMCC, test_file('unistd/close.c'), '-nostdlib'] + libs)
     self.run_process([EMCC, test_file('unistd/close.c'), '-nodefaultlibs'] + libs)
-    self.run_process([EMCC, test_file('unistd/close.c'), '-nolibc', '-lc'])
+    self.run_process([EMCC, test_file('unistd/close.c'), '-nolibc', '-lc', '-lpthread'])
     self.run_process([EMCC, test_file('unistd/close.c'), '-nostartfiles'])
 
   def test_argument_match(self):
@@ -13183,12 +13183,13 @@ def test_offset_convertor_plus_wasm2js(self):
 
   def test_standard_library_mapping(self):
     # Test the `-l` flags on the command line get mapped the correct libraries variant
-    libs = ['-lc', '-lbulkmemory', '-lcompiler_rt', '-lmalloc']
+    libs = ['-lc', '-lpthread', '-lbulkmemory', '-lcompiler_rt', '-lmalloc']
     err = self.run_process([EMCC, test_file('hello_world.c'), '-pthread', '-nodefaultlibs', '-v'] + libs, stderr=PIPE).stderr
 
     # Check that the linker was run with `-mt` variants because `-pthread` was passed.
     self.assertContained(' -lc-mt-debug ', err)
     self.assertContained(' -ldlmalloc-mt ', err)
+    self.assertContained(' -lpthread-debug ', err)
     self.assertContained(' -lcompiler_rt-mt ', err)
 
   def test_explicit_gl_linking(self):

tools/link.py

@@ -2721,7 +2721,6 @@ def map_to_js_libs(library_name):
     'dl': [],
     'm': [],
     'rt': [],
-    'pthread': [],
     # This is the name of GNU's C++ standard library. We ignore it here
     # for compatibility with GNU toolchains.
     'stdc++': [],