Make improvements

- More timspec_*() and timeval_*() APIs have been introduced.
- The copyfd() function is now simplified thanks to POSIX rules.
- More Cosmo-specific APIs have been moved behind the COSMO define.
- The setitimer() polyfill for Windows NT is now much higher quality.
- Fixed build error for MODE=aarch64 due to -mstringop-strategy=loop.
- This change introduces `make MODE=nox87 toolchain` which makes it
  possible to build programs using your cosmocc toolchain that don't
  have legacy fpu instructions. This is useful, for example, if you
  want to have a ~22kb tinier blink virtual machine.

tool/build/ar.c

@@ -30,7 +30,6 @@
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/arraylist2.internal.h"
-#include "libc/mem/copyfd.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/sock/sock.h"
@@ -322,8 +321,8 @@ int main(int argc, char *argv[]) {
       goto fail;
     }
     outsize += (remain = sizes.p[i]);
-    if (_copyfd(fd, outfd, remain) == -1) {
-      reason = "copy_file_range failed";
+    if (copyfd(fd, outfd, remain) == -1) {
+      reason = "copy failed";
       goto fail;
     }
     close(fd);

tool/build/compile.c

@@ -43,7 +43,6 @@
 #include "libc/macros.internal.h"
 #include "libc/math.h"
 #include "libc/mem/alg.h"
-#include "libc/mem/copyfd.internal.h"
 #include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/nexgen32e/kcpuids.h"
@@ -769,7 +768,7 @@ bool MovePreservingDestinationInode(const char *from, const char *to) {
         res = false;
         break;
       }
-      res = _copyfd(fdin, fdout, -1) != -1;
+      res = copyfd(fdin, fdout, -1) != -1;
       break;
     } else {
       res = false;

tool/build/cp.c

@@ -23,7 +23,6 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/fmt.h"
 #include "libc/fmt/magnumstrs.internal.h"
-#include "libc/mem/copyfd.internal.h"
 #include "libc/mem/gc.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
@@ -176,7 +175,7 @@ bool MovePreservingDestinationInode(const char *from, const char *to) {
     close(fdin);
     return false;
   }
-  res = _copyfd(fdin, fdout, -1) != -1;
+  res = copyfd(fdin, fdout, -1) != -1;
   close(fdin);
   close(fdout);
   return res;

tool/build/ocat.c

@@ -20,7 +20,6 @@
 #include "libc/errno.h"
 #include "libc/fmt/itoa.h"
 #include "libc/fmt/magnumstrs.internal.h"
-#include "libc/mem/copyfd.internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/ex.h"

tool/build/pledge.c

@@ -39,7 +39,6 @@
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/math.h"
-#include "libc/mem/copyfd.internal.h"
 #include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/nexgen32e/kcpuids.h"
@@ -523,7 +522,7 @@ int Extract(const char *from, const char *to, int mode) {
     close(fdin);
     return -1;
   }
-  if (_copyfd(fdin, fdout, -1) == -1) {
+  if (copyfd(fdin, fdout, -1) == -1) {
     close(fdout);
     close(fdin);
     return -1;