Get codebase completely working with LLVM

You can now build Cosmopolitan with Clang:

    make -j8 MODE=llvm
    o/llvm/examples/hello.com

The assembler and linker code is now friendly to LLVM too.
So it's not needed to configure Clang to use binutils under
the hood. If you love LLVM then you can now use pure LLVM.

test/libc/calls/fallocate_test.c

@@ -1,94 +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/bits/safemacros.h"
-#include "libc/calls/calls.h"
-#include "libc/calls/struct/stat.h"
-#include "libc/dce.h"
-#include "libc/errno.h"
-#include "libc/runtime/gc.h"
-#include "libc/runtime/runtime.h"
-#include "libc/stdio/stdio.h"
-#include "libc/testlib/testlib.h"
-#include "libc/x/x.h"
-
-int rc;
-struct stat st;
-const char *path;
-int64_t fd, emptyspace, physicalspace;
-
-TEST(fallocate_000, setup) {
-  mkdir("o", 0755);
-  mkdir("o/tmp", 0755);
-}
-
-TEST(fallocate_010, testBadFileDescriptor) {
-  if (IsOpenbsd()) return; /* ENOSYS */
-  if (IsFreebsd()) return; /* TODO: Where's my carry flag FreeBSD? */
-  close(70);               /* just in case */
-  ASSERT_EQ(-1, fallocate(/*RHEL*/ 70, 0, 0, 1));
-  if (errno == ENOSYS) exit(0); /* RHEL5 */
-  EXPECT_EQ(EBADF, errno);
-}
-
-TEST(fallocate_020, test) {
-  if (IsOpenbsd()) return; /* ENOSYS */
-  path = gc(xasprintf("o/tmp/%s.%d", program_invocation_short_name));
-  ASSERT_NE(-1, (fd = creat(path, 0755)));
-  ASSERT_EQ(5, write(fd, "hello", 5));
-  errno = 31337;
-  ASSERT_NE(-1, fallocate(fd, 0, 0, 31337));
-  EXPECT_EQ(31337, errno);
-  ASSERT_EQ(5, write(fd, "world", 5));
-  ASSERT_NE(-1, close(fd));
-  ASSERT_NE(-1, stat(path, &st));
-  ASSERT_EQ(31337, st.st_size);
-  ASSERT_BINEQ(u"helloworld", gc(xslurp(path, NULL)));
-  unlink(path);
-}
-
-TEST(fallocate_020, testSparseFile) {
-  if (IsOpenbsd()) return; /* ENOSYS */
-  if (IsWindows()) return; /* TODO */
-  ASSERT_NE(-1, stat("o", &st));
-  emptyspace = rounddown(6 * 1000 * 1000 * 1000, st.st_blksize);
-  physicalspace = roundup(4096, st.st_blksize);
-  path = gc(xasprintf("o/tmp/%s.%d", program_invocation_short_name, getpid()));
-  ASSERT_NE(-1, (fd = creat(path, 0755)));
-  rc = fallocate(fd, 0, emptyspace, physicalspace);
-  if (rc == -1) {
-    /*
-     * most important feature is failing w/ enosys if not possible to
-     * allocate storage like a central banker prints money.
-     */
-    ASSERT_EQ(ENOSYS, errno);
-  }
-  ASSERT_EQ(emptyspace, lseek(fd, emptyspace, SEEK_SET));
-  ASSERT_EQ(5, write(fd, "hello", 5));
-  ASSERT_NE(-1, fsync(fd));
-  ASSERT_NE(-1, close(fd));
-  ASSERT_NE(-1, stat(path, &st));
-  EXPECT_EQ(emptyspace + physicalspace, st.st_size);
-  /*
-   * don't care how much physical space system needs, so long as it's
-   * transparent and less than 10 percent the fake space
-   */
-  EXPECT_NE(0, st.st_blocks);
-  EXPECT_LT(st.st_blocks * 512, emptyspace / 10);
-  unlink(path);
-}

test/libc/calls/sigaction_test.c

@@ -26,7 +26,7 @@
 #include "libc/sysv/consts/sig.h"
 #include "libc/testlib/testlib.h"
 
-bool gotsigint;
+volatile bool gotsigint;
 
 void OnSigInt(int sig) {
   gotsigint = true;
@@ -63,7 +63,7 @@ TEST(sigaction, test) {
   EXPECT_EQ(1, WIFEXITED(status));
   EXPECT_EQ(0, WEXITSTATUS(status));
   EXPECT_EQ(0, WTERMSIG(status));
-  EXPECT_NE(-1, sigprocmask(SIG_BLOCK, &oldmask, NULL));
+  EXPECT_NE(-1, sigprocmask(SIG_SETMASK, &oldmask, NULL));
 }
 
 TEST(sigaction, raise) {

test/libc/calls/test.mk

@@ -37,6 +37,7 @@ TEST_LIBC_CALLS_DIRECTDEPS =				\
 	LIBC_STUBS					\
 	LIBC_SYSV					\
 	LIBC_TESTLIB					\
+	LIBC_UNICODE					\
 	LIBC_X
 
 TEST_LIBC_CALLS_DEPS :=					\