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/viz/int2float.c

@@ -1,82 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/conv.h"
-#include "libc/limits.h"
-#include "libc/macros.internal.h"
-#include "libc/mem/gc.h"
-#include "libc/stdio/stdio.h"
-#include "libc/str/str.h"
-#include "libc/x/x.h"
-#include "libc/x/xasprintf.h"
-
-float b32;
-double b64;
-long double b80;
-uint32_t u32;
-uint64_t u64;
-int128_t x;
-
-void int2float(const char *s) {
-  x = strtoi128(s, NULL, 0);
-  if ((0 <= x && x <= UINT32_MAX) && !_startswith(s, "-") &&
-      (!_endswith(s, "l") && !_endswith(s, "L"))) {
-    u32 = x;
-    memcpy(&b32, &u32, 4);
-    s = _gc(xdtoa(b32));
-    if (!strchr(s, '.')) s = _gc(xasprintf("%s.", s));
-    s = _gc(xasprintf("%sf", s));
-    puts(s);
-  } else if ((0 <= x && x <= UINT64_MAX) && !_startswith(s, "-")) {
-    u64 = x;
-    memcpy(&b64, &u64, 8);
-    s = _gc(xdtoa(b64));
-    if (!strchr(s, '.')) s = _gc(xasprintf("%s.", s));
-    puts(s);
-  } else if ((INT32_MIN <= x && x <= 0) &&
-             (!_endswith(s, "l") && !_endswith(s, "L"))) {
-    u32 = ABS(x);
-    memcpy(&b32, &u32, 4);
-    b32 = -b32;
-    s = _gc(xdtoa(b32));
-    if (!strchr(s, '.')) s = _gc(xasprintf("%s.", s));
-    s = _gc(xasprintf("%sf", s));
-    puts(s);
-  } else if (INT64_MIN <= x && x <= 0) {
-    u64 = ABS(x);
-    memcpy(&b64, &u64, 8);
-    b64 = -b64;
-    s = _gc(xdtoa(b64));
-    if (!strchr(s, '.')) s = _gc(xasprintf("%s.", s));
-    puts(s);
-  } else {
-    memcpy(&b80, &x, 16);
-    s = _gc(xdtoa(b80));
-    if (!strchr(s, '.')) s = _gc(xasprintf("%s.", s));
-    s = _gc(xasprintf("%sL", s));
-    puts(s);
-  }
-}
-
-int main(int argc, char *argv[]) {
-  int i;
-  for (i = 1; i < argc; ++i) {
-    int2float(argv[i]);
-  }
-  return 0;
-}

tool/viz/printpeb.c

@@ -21,7 +21,6 @@
 #include "libc/dce.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/log/log.h"
-#include "libc/mem/copyfd.internal.h"
 #include "libc/nt/dll.h"
 #include "libc/nt/enum/filetype.h"
 #include "libc/nt/enum/startf.h"
@@ -58,7 +57,7 @@ int NextBestThing(void) {
   int64_t fd = open("/proc/self/maps", O_RDONLY);
   posix_fadvise(fd, 0, 0, MADV_SEQUENTIAL);
   ssize_t wrote;
-  while ((wrote = _copyfd(fd, 1, -1)) != -1) {
+  while ((wrote = copyfd(fd, 1, -1)) != -1) {
     if (wrote == 0) break;
   }
   close(fd);