Make improvements

- Introduce portable sched_getcpu() api
- Support GCC's __target_clones__ feature
- Make fma() go faster on x86 in default mode
- Remove some asan checks from core libraries
- WinMain() now ensures $HOME and $USER are defined

libc/stdio/fmt.c

@@ -43,7 +43,6 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/divmod10.internal.h"
 #include "libc/fmt/itoa.h"
-#include "libc/serialize.h"
 #include "libc/intrin/bsr.h"
 #include "libc/intrin/nomultics.internal.h"
 #include "libc/intrin/safemacros.internal.h"
@@ -53,6 +52,7 @@
 #include "libc/mem/mem.h"
 #include "libc/mem/reverse.internal.h"
 #include "libc/runtime/internal.h"
+#include "libc/serialize.h"
 #include "libc/str/str.h"
 #include "libc/str/strwidth.h"
 #include "libc/str/tab.internal.h"
@@ -800,7 +800,7 @@ int __fmt(void *fn, void *arg, const char *format, va_list va) {
 
   x = 0;
   lasterr = errno;
-  out = fn ? fn : __fmt_noop;
+  out = fn ? fn : (void *)__fmt_noop;
 
   while (*format) {
     if (*format != '%') {

libc/stdio/ftw.c

@@ -50,5 +50,5 @@ int ftw(const char *dirpath,
 	/* The following cast assumes that calling a function with one
 	 * argument more than it needs behaves as expected. This is
 	 * actually undefined, but works on all real-world machines. */
-	return nftw(dirpath, (int (*)())fn, fd_limit, FTW_PHYS);
+	return nftw(dirpath, (void *)fn, fd_limit, FTW_PHYS);
 }

libc/stdio/printargs.c

@@ -84,6 +84,7 @@ static const char *FindNameById(const struct IdName *names, unsigned long id) {
 }
 
 static void PrintDependencies(const char *prologue) {
+#ifdef __x86_64__
   struct NtLinkedList *head = &NtGetPeb()->Ldr->InLoadOrderModuleList;
   struct NtLinkedList *ldr = head->Next;
   do {
@@ -92,6 +93,7 @@ static void PrintDependencies(const char *prologue) {
     PRINT(" ☼ %.*!hs (%'zukb @ %p)", dll->FullDllName.Length,
           dll->FullDllName.Data, dll->SizeOfImage / 1024, dll->DllBase);
   } while ((ldr = ldr->Next) && ldr != head);
+#endif
 }
 
 static void Print(const char *prologue) {
@@ -624,6 +626,7 @@ textstartup void __printargs(const char *prologue) {
     if (GetConsoleMode(GetStdHandle(kNtStdErrorHandle), &cm))
       PRINT("   %s", DescribeNtConsoleOutFlags(cm));
 
+#ifdef __x86_64__
     PRINT("");
     PRINT("TEB");
     PRINT(" ☼ gs:0x%02x %s = %p", 0x00, "NtGetSeh()", _NtGetSeh());
@@ -640,6 +643,7 @@ textstartup void __printargs(const char *prologue) {
     PRINT(" ☼ gs:0x%02x %s = %p", 0x58, "NtGetTls()", _NtGetTls());
     PRINT(" ☼ gs:0x%02x %s = %p", 0x60, "NtGetPeb()", NtGetPeb());
     PRINT(" ☼ gs:0x%02x %s = %p", 0x68, "NtGetErr()", NtGetErr());
+#endif
 
     PRINT("");
     PRINT("DEPENDENCIES");

libc/stdio/rdseed.c

@@ -27,7 +27,7 @@
  *
  * If RDSEED isn't available, we'll try RDRAND (which we automatically
  * disable for microarchitectures where it's known to be slow or buggy).
- * If RDRAND isn't available then we try getrandom(), RtlGenRandom(), or
+ * If RDRAND isn't available then we try getrandom(), ProcessPrng(), or
  * sysctl(KERN_ARND). If those aren't available then we try /dev/urandom
  * and if that fails, we use RDTSC and getpid().
  *

libc/stdio/rngset.c

@@ -45,9 +45,6 @@ dontasan void *rngset(void *b, size_t n, uint64_t seed(void), size_t reseed) {
   size_t m;
   uint64_t x, t = 0;
   unsigned char *p = b;
-  if (IsAsan()) {
-    __asan_verify(b, n);
-  }
   if (!seed) {
     t = reseed;
     reseed = -1;

libc/stdio/stdio.h

@@ -90,7 +90,7 @@ int fsetpos(FILE *, const fpos_t *) libcesque paramsnonnull();
 FILE *tmpfile(void) libcesque __wur;
 char *tmpnam(char *) libcesque __wur;
 char *tmpnam_r(char *) libcesque __wur;
-int system(const char *) libcesque;
+
 FILE *popen(const char *, const char *) libcesque;
 
 /*───────────────────────────────────────────────────────────────────────────│─╗

libc/stdio/tmpnam.c

@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/dce.h"
-#include "libc/intrin/asan.internal.h"
 #include "libc/stdio/rand.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
@@ -35,7 +34,6 @@ static char g_tmpnam[L_tmpnam];
  *     is only mutated on success
  */
 char *tmpnam(char *buf) {
-  if (IsAsan()) __asan_verify(buf, L_tmpnam);
   char path[] = P_tmpdir "/tmpnam_XXXXXX";
   for (int t = 0; t < 100; ++t) {
     int w = _rand64();