reduce spurious inclusion of libc.h

libc.h was intended to be a header for access to global libc state and
related interfaces, but ended up included all over the place because
it was the way to get the weak_alias macro. most of the inclusions
removed here are places where weak_alias was needed. a few were
recently introduced for hidden. some go all the way back to when
libc.h defined CANCELPT_BEGIN and _END, and all (wrongly implemented)
cancellation points had to include it.

remaining spurious users are mostly callers of the LOCK/UNLOCK macros
and files that use the LFS64 macro to define the awful *64 aliases.

in a few places, new inclusion of libc.h is added because several
internal headers no longer implicitly include libc.h.

declarations for __lockfile and __unlockfile are moved from libc.h to
stdio_impl.h so that the latter does not need libc.h. putting them in
libc.h made no sense at all, since the macros in stdio_impl.h are
needed to use them correctly anyway.

8 files changed, 1 insertions, 8 deletions

diff --git a/src/thread/__syscall_cp.c b/src/thread/__syscall_cp.c
index afd82eff..af666f06 100644
--- a/src/thread/__syscall_cp.c
+++ b/src/thread/__syscall_cp.c
@@ -1,6 +1,5 @@
 #include "pthread_impl.h"
 #include "syscall.h"
-#include "libc.h"
 
 hidden long __syscall_cp_c();
 
diff --git a/src/thread/__tls_get_addr.c b/src/thread/__tls_get_addr.c
index 013817b4..34fbc46c 100644
--- a/src/thread/__tls_get_addr.c
+++ b/src/thread/__tls_get_addr.c
@@ -1,6 +1,5 @@
 #include <stddef.h>
 #include "pthread_impl.h"
-#include "libc.h"
 
 void *__tls_get_addr(tls_mod_off_t *v)
 {
diff --git a/src/thread/pthread_attr_setinheritsched.c b/src/thread/pthread_attr_setinheritsched.c
index 605af973..6a648376 100644
--- a/src/thread/pthread_attr_setinheritsched.c
+++ b/src/thread/pthread_attr_setinheritsched.c
@@ -1,6 +1,5 @@
 #include "pthread_impl.h"
 #include "syscall.h"
-#include "libc.h"
 
 hidden void *__start_sched(void *p)
 {
diff --git a/src/thread/pthread_cancel.c b/src/thread/pthread_cancel.c
index 43f8d405..2f9d5e97 100644
--- a/src/thread/pthread_cancel.c
+++ b/src/thread/pthread_cancel.c
@@ -2,7 +2,6 @@
 #include <string.h>
 #include "pthread_impl.h"
 #include "syscall.h"
-#include "libc.h"
 
 hidden long __cancel(), __syscall_cp_asm(), __syscall_cp_c();
 
diff --git a/src/thread/pthread_equal.c b/src/thread/pthread_equal.c
index 7c31482a..dbb73655 100644
--- a/src/thread/pthread_equal.c
+++ b/src/thread/pthread_equal.c
@@ -1,6 +1,5 @@
 #include <pthread.h>
 #include <threads.h>
-#include "libc.h"
 
 static int __pthread_equal(pthread_t a, pthread_t b)
 {
diff --git a/src/thread/pthread_self.c b/src/thread/pthread_self.c
index 241a6202..bd3bf95b 100644
--- a/src/thread/pthread_self.c
+++ b/src/thread/pthread_self.c
@@ -1,6 +1,5 @@
 #include "pthread_impl.h"
 #include <threads.h>
-#include "libc.h"
 
 static pthread_t __pthread_self_internal()
 {
diff --git a/src/thread/pthread_testcancel.c b/src/thread/pthread_testcancel.c
index ee48e6d8..d772449d 100644
--- a/src/thread/pthread_testcancel.c
+++ b/src/thread/pthread_testcancel.c
@@ -1,5 +1,4 @@
 #include "pthread_impl.h"
-#include "libc.h"
 
 static void dummy()
 {
diff --git a/src/thread/x32/syscall_cp_fixup.c b/src/thread/x32/syscall_cp_fixup.c
index b1a1faa6..4956610f 100644
--- a/src/thread/x32/syscall_cp_fixup.c
+++ b/src/thread/x32/syscall_cp_fixup.c
@@ -1,5 +1,5 @@
 #include <sys/syscall.h>
-#include "libc.h"
+#include <features.h>
 
 hidden long __syscall_cp_internal(volatile void*, long long, long long,
                                   long long, long long, long long,