Make important improvements

- Fix preadv() and pwritev() for old distros
- Introduce _npassert() and _unassert() macros
- Prove that file locks work properly on Windows
- Support fcntl(F_DUPFD_CLOEXEC) on more systems

third_party/chibicc/as.c

@@ -31,6 +31,7 @@
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "libc/sysv/consts/o.h"
 #include "libc/sysv/consts/s.h"
 #include "libc/x/x.h"

third_party/chibicc/tokenize.c

@@ -2,6 +2,7 @@
 #include "libc/log/log.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "third_party/chibicc/chibicc.h"
 #include "third_party/chibicc/file.h"
 #include "third_party/chibicc/kw.h"

third_party/linenoise/linenoise.c

@@ -154,6 +154,7 @@
 #include "libc/stdio/append.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "libc/str/unicode.h"
 #include "libc/sysv/consts/fileno.h"
 #include "libc/sysv/consts/map.h"

third_party/lua/llock.c

@@ -16,6 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/thread/thread.h"
 #include "third_party/lua/lrepl.h"
 
 static pthread_mutex_t lua_repl_lock_obj;

third_party/python/Include/pyctype.h

@@ -1,7 +1,7 @@
 #ifndef Py_LIMITED_API
 #ifndef PYCTYPE_H
 #define PYCTYPE_H
-#include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 
 #define Py_TOLOWER(c) kToLower[255 & (c)]
 #define Py_TOUPPER(c) kToUpper[255 & (c)]

third_party/sqlite3/main.c

@@ -3105,6 +3105,10 @@ static int openDatabase(
   char *zErrMsg = 0;              /* Error message from sqlite3ParseUri() */
   int i;                          /* Loop counter */
 
+  // TODO(jart): Fix SQLite.
+  extern bool __force_sqlite_to_work_until_we_can_fix_it;
+  __force_sqlite_to_work_until_we_can_fix_it = true;
+
 #ifdef SQLITE_ENABLE_API_ARMOR
   if( ppDb==0 ) return SQLITE_MISUSE_BKPT;
 #endif