Use *NSYNC for POSIX threads locking APIs

Condition variables, barriers, and r/w locks now work very well.

libc/thread/thread.mk

@@ -7,20 +7,14 @@ LIBC_THREAD_ARTIFACTS += LIBC_THREAD_A
 LIBC_THREAD = $(LIBC_THREAD_A_DEPS) $(LIBC_THREAD_A)
 LIBC_THREAD_A = o/$(MODE)/libc/thread/thread.a
 LIBC_THREAD_A_FILES := $(wildcard libc/thread/*)
-LIBC_THREAD_A_SRCS_S = $(filter %.S,$(LIBC_THREAD_A_FILES))
+LIBC_THREAD_A_HDRS = $(filter %.h,$(LIBC_THREAD_A_FILES))
 LIBC_THREAD_A_SRCS_C = $(filter %.c,$(LIBC_THREAD_A_FILES))
+LIBC_THREAD_A_SRCS_S = $(filter %.S,$(LIBC_THREAD_A_FILES))
 
 LIBC_THREAD_A_SRCS =					\
 	$(LIBC_THREAD_A_SRCS_S)				\
 	$(LIBC_THREAD_A_SRCS_C)
 
-LIBC_THREAD_A_HDRS =					\
-	libc/thread/spawn.h				\
-	libc/thread/thread.h				\
-	libc/thread/thread2.h				\
-	libc/thread/tls.h				\
-	libc/thread/tls2.h
-
 LIBC_THREAD_A_OBJS =					\
 	$(LIBC_THREAD_A_SRCS_S:%.S=o/$(MODE)/%.o)	\
 	$(LIBC_THREAD_A_SRCS_C:%.c=o/$(MODE)/%.o)
@@ -39,7 +33,8 @@ LIBC_THREAD_A_DIRECTDEPS =				\
 	LIBC_STUBS					\
 	LIBC_SYSV					\
 	LIBC_SYSV_CALLS					\
-	LIBC_NEXGEN32E
+	LIBC_NEXGEN32E					\
+	THIRD_PARTY_NSYNC
 
 LIBC_THREAD_A_DEPS :=					\
 	$(call uniq,$(foreach x,$(LIBC_THREAD_A_DIRECTDEPS),$($(x))))
@@ -53,6 +48,11 @@ $(LIBC_THREAD_A).pkg:					\
 		$(LIBC_THREAD_A_OBJS)			\
 		$(foreach x,$(LIBC_THREAD_A_DIRECTDEPS),$($(x)_A).pkg)
 
+$(LIBC_THREAD_A_OBJS): private				\
+		OVERRIDE_CCFLAGS +=			\
+			-ffunction-sections		\
+			-fdata-sections
+
 LIBC_THREAD_LIBS = $(foreach x,$(LIBC_THREAD_ARTIFACTS),$($(x)))
 LIBC_THREAD_SRCS = $(foreach x,$(LIBC_THREAD_ARTIFACTS),$($(x)_SRCS))
 LIBC_THREAD_HDRS = $(foreach x,$(LIBC_THREAD_ARTIFACTS),$($(x)_HDRS))