Reduce header complexity

- Remove most __ASSEMBLER__ __LINKER__ ifdefs
- Rename libc/intrin/bits.h to libc/serialize.h
- Block pthread cancelation in fchmodat() polyfill
- Remove `clang-format off` statements in third_party

third_party/chibicc/as.c

@@ -20,7 +20,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/elf/def.h"
 #include "libc/fmt/conv.h"
-#include "libc/intrin/bits.h"
 #include "libc/intrin/bsr.h"
 #include "libc/intrin/popcnt.h"
 #include "libc/log/check.h"
@@ -38,6 +37,7 @@
 #include "libc/x/xasprintf.h"
 #include "third_party/chibicc/file.h"
 #include "third_party/gdtoa/gdtoa.h"
+#include "libc/serialize.h"
 #include "tool/build/lib/elfwriter.h"
 
 #define OSZ  0x66

third_party/chibicc/chibicc.h

@@ -24,7 +24,6 @@
 #include "libc/x/x.h"
 #include "third_party/gdtoa/gdtoa.h"
 #include "tool/build/lib/javadown.h"
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 #pragma GCC diagnostic ignored "-Wswitch"
@@ -664,5 +663,4 @@ void Assembler(int, char **);
 void output_bindings_python(const char *, Obj *, Token *);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_THIRD_PARTY_CHIBICC_CHIBICC_H_ */

third_party/chibicc/dox2.c

@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
 #include "libc/intrin/bsr.h"
 #include "libc/mem/alg.h"
 #include "libc/sysv/consts/map.h"

third_party/chibicc/file.h

@@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_THIRD_PARTY_CHIBICC_FILE_H_
 #define COSMOPOLITAN_THIRD_PARTY_CHIBICC_FILE_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 char *skip_bom(char *);
@@ -9,5 +8,4 @@ void remove_backslash_newline(char *);
 void canonicalize_newline(char *);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_THIRD_PARTY_CHIBICC_FILE_H_ */

third_party/chibicc/kw.h

@@ -121,11 +121,9 @@
 #define KW___ATOMIC_COMPARE_EXCHANGE_N  137
 #define KW___ATOMIC_EXCHANGE_N          138
 
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 unsigned char GetKw(const char *, size_t);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_THIRD_PARTY_CHIBICC_KW_H_ */

third_party/chibicc/kw.inc

@@ -1,7 +1,6 @@
 /* ANSI-C code produced by gperf version 3.1 */
 /* Command-line: gperf kw.gperf  */
 /* Computed positions: -k'1,4,11,14,17,$' */
-// clang-format off
 
 #if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
       && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \

third_party/chibicc/pybind.c

@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/fmt/conv.h"
 #include "libc/fmt/libgen.h"
-#include "libc/intrin/bits.h"
+#include "libc/serialize.h"
 #include "libc/log/libfatal.internal.h"
 #include "libc/mem/gc.h"
 #include "libc/mem/mem.h"

third_party/chibicc/test/macro_test.c

@@ -1,6 +1,5 @@
 #include "third_party/chibicc/test/include1.h"
 #include "third_party/chibicc/test/test.h"
-/* clang-format off */
 char *main_filename1 = __FILE__;
 int main_line1 = __LINE__;
 #define LINE() __LINE__
@@ -341,8 +340,8 @@ int main() {
   ASSERT(1, __STDC__);
 
   ASSERT(0, strcmp(main_filename1, "third_party/chibicc/test/macro_test.c"));
-  ASSERT(5, main_line1);
-  ASSERT(7, main_line2);
+  ASSERT(4, main_line1);
+  ASSERT(6, main_line2);
   ASSERT(0, strcmp(include1_filename, "third_party/chibicc/test/include1.h"));
   ASSERT(4, include1_line);