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

tool/viz/lib/bilinearscale.h

@@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_TOOL_VIZ_LIB_BILINEARSCALE_H_
 #define COSMOPOLITAN_TOOL_VIZ_LIB_BILINEARSCALE_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 void *BilinearScale(long dcw, long dyw, long dxw,
@@ -10,5 +9,4 @@ void *BilinearScale(long dcw, long dyw, long dxw,
                     double);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_BILINEARSCALE_H_ */

tool/viz/lib/convolution.h

@@ -1,7 +1,6 @@
 #ifndef COSMOPOLITAN_TOOL_VIZ_LIB_CONVOLUTION_H_
 #define COSMOPOLITAN_TOOL_VIZ_LIB_CONVOLUTION_H_
 #include "dsp/core/q.h"
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 /* clang-format off */
 
 #define CONVROUND(X) ((int)rint(X))
@@ -63,5 +62,4 @@
 
 unsigned *convoindex(unsigned, unsigned, unsigned) mallocesque;
 
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_CONVOLUTION_H_ */

tool/viz/lib/convolve.h

@@ -4,7 +4,6 @@
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
 #include "tool/viz/lib/graphic.h"
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 typedef float convolve_t __attribute__((__vector_size__(16)));
@@ -42,5 +41,4 @@ forceinline void convolve(unsigned yn, unsigned xn, ttyrgb_m128 img[yn][xn],
 }
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_CONVOLVE_H_ */

tool/viz/lib/formatstringtable-assembly.c

@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/fmt/itoa.h"
-#include "libc/intrin/bits.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/mem/gc.internal.h"
 #include "libc/str/str.h"

tool/viz/lib/formatstringtable-testlib.h

@@ -4,7 +4,6 @@
 #include "libc/str/str.h"
 #include "libc/testlib/testlib.h"
 #include "tool/viz/lib/formatstringtable.h"
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 
 /**
  * Tests matrix contains expected content w/ string compare.
@@ -64,5 +63,4 @@
 void testlib_showerror_expect_matrixeq(int, const char *, const char *, char *,
                                        char *, const char *, ...);
 
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_FORMATSTRINGTABLE_TESTLIB_H_ */

tool/viz/lib/formatstringtable.h

@@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_TOOL_VIZ_LIB_FORMATSTRINGTABLE_H_
 #define COSMOPOLITAN_TOOL_VIZ_LIB_FORMATSTRINGTABLE_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 typedef void *StringTableFormatter(long yn, long xn, const char *const[yn][xn],
@@ -44,5 +43,4 @@ char *StringifyMatrixShort(long yn, long xn, const short[yn][xn],
                            const char *) mallocesque;
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_FORMATSTRINGTABLE_H_ */

tool/viz/lib/graphic.h

@@ -1,7 +1,6 @@
 #ifndef COSMOPOLITAN_TOOL_VIZ_LIB_GRAPHIC_H_
 #define COSMOPOLITAN_TOOL_VIZ_LIB_GRAPHIC_H_
 #include "dsp/tty/quant.h"
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 struct Graphic {
@@ -45,5 +44,4 @@ void WriteToFrameBuffer(size_t dyn, size_t dxn, unsigned char dst[dyn][dxn][4],
                         size_t yn, size_t xn);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_GRAPHIC_H_ */

tool/viz/lib/halfblit.h

@@ -1,10 +1,8 @@
 #ifndef COSMOPOLITAN_TOOL_VIZ_LIB_HALFBLIT_H_
 #define COSMOPOLITAN_TOOL_VIZ_LIB_HALFBLIT_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 void *halfblit(size_t, void *);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_HALFBLIT_H_ */

tool/viz/lib/knobs.h

@@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_TOOL_VIZ_LIB_KNOBS_H_
 #define COSMOPOLITAN_TOOL_VIZ_LIB_KNOBS_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 extern bool pf1_;
@@ -17,5 +16,4 @@ extern bool pf11_;
 extern bool pf12_;
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_KNOBS_H_ */

tool/viz/lib/perlin3.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/macros.internal.h"
 #include "libc/math.h"
 #include "tool/viz/lib/graphic.h"

tool/viz/lib/stringbuilder.h

@@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_TOOL_VIZ_LIB_STRINGBUILDER_H_
 #define COSMOPOLITAN_TOOL_VIZ_LIB_STRINGBUILDER_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 struct StringBuilder {
@@ -17,5 +16,4 @@ char *FreeStringBuilder(struct StringBuilder *) mallocesque returnsnonnull
     paramsnonnull();
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_STRINGBUILDER_H_ */

tool/viz/lib/ycbcr.h

@@ -1,6 +1,5 @@
 #ifndef COSMOPOLITAN_TOOL_VIZ_LIB_YCBCR_H_
 #define COSMOPOLITAN_TOOL_VIZ_LIB_YCBCR_H_
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
 struct YCbCr;
@@ -30,5 +29,4 @@ void *YCbCr2RgbScale(long dyn, long dxn, unsigned char[restrict 3][dyn][dxn],
                      double, double, double, double, struct YCbCr **);
 
 COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_TOOL_VIZ_LIB_YCBCR_H_ */