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

tool/build/blinkenlights.c

@@ -59,6 +59,7 @@
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/str/strwidth.h"
+#include "libc/str/tab.internal.h"
 #include "libc/str/thompike.h"
 #include "libc/str/tpdecode.internal.h"
 #include "libc/str/tpencode.internal.h"

tool/build/lib/cga.c

@@ -19,6 +19,7 @@
 #include "libc/fmt/itoa.h"
 #include "libc/macros.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "tool/build/lib/buffer.h"
 #include "tool/build/lib/cga.h"
 

tool/build/lib/isnocompressext.c

@@ -20,6 +20,7 @@
 #include "libc/intrin/bswap.h"
 #include "libc/macros.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "tool/build/lib/isnocompressext.h"
 
 static const char kNoCompressExts[][8] = {

tool/build/lib/mda.c

@@ -18,6 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/macros.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "tool/build/lib/buffer.h"
 #include "tool/build/lib/mda.h"
 

tool/build/lz4toasm.c

@@ -22,14 +22,15 @@
 #include "libc/log/check.h"
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/nexgen32e/kompressor.h"
 #include "libc/nexgen32e/lz4.h"
 #include "libc/runtime/ezmap.internal.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "libc/x/x.h"
 #include "third_party/getopt/getopt.h"
 

tool/build/pledge.c

@@ -18,6 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/calls/calls.h"
+#include "libc/calls/copyfd.internal.h"
 #include "libc/calls/landlock.h"
 #include "libc/calls/pledge.h"
 #include "libc/calls/pledge.internal.h"
@@ -39,10 +40,9 @@
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/math.h"
-#include "libc/calls/copyfd.internal.h"
+#include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/nexgen32e/kcpuids.h"
-#include "libc/mem/gc.internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/runtime/sysconf.h"
 #include "libc/sock/sock.h"

tool/build/xlat.c

@@ -21,11 +21,12 @@
 #include "libc/fmt/conv.h"
 #include "libc/log/check.h"
 #include "libc/math.h"
-#include "libc/mem/mem.h"
 #include "libc/mem/gc.h"
+#include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "libc/x/xasprintf.h"
 
 /**