Clean up some code

- Use good ELF technique in cosmo_dlopen()
- Make strerror() conform more to other libc impls
- Introduce __clear_cache() and use it in cosmo_dlopen()
- Remove libc/fmt/fmt.h header (trying to kill off LIBC_FMT)

libc/stdio/demangle.c

@@ -30,7 +30,6 @@
 #include "libc/cxxabi.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"

libc/stdio/ecvt.c

@@ -22,7 +22,6 @@
 │ Materiel Command, USAF, under agreement number F39502-99-1-0512.             │
 │ SUCH DAMAGE.                                                                 │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"

libc/stdio/fmt.c

@@ -38,7 +38,6 @@
 │ ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF               │
 │ THIS SOFTWARE.                                                               │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/assert.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"

libc/stdio/fscanf.c

@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdio/stdio.h"
 
 /**

libc/stdio/gcvt.c

@@ -22,7 +22,6 @@
 │ Materiel Command, USAF, under agreement number F39502-99-1-0512.             │
 │ SUCH DAMAGE.                                                                 │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"

libc/stdio/scanf.c

@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/struct/fd.internal.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdio/stdio.h"
 
 /**

libc/stdio/sprintf.c

@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/log/log.h"
 

libc/stdio/sscanf.c

@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 
 /**

libc/stdio/vcscanf.c

@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/mem/internal.h"
 #include "libc/mem/mem.h"

libc/stdio/vdprintf.c

@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/struct/iovec.internal.h"
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/nt/files.h"

libc/stdio/vfprintf_unlocked.c

@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdckdint.h"
 #include "libc/stdio/internal.h"
 #include "libc/stdio/stdio.h"

libc/stdio/vfscanf.c

@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdio/stdio.h"
 
 /**

libc/stdio/vscanf.c

@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdio/stdio.h"
 
 /**

libc/stdio/vsnprintf.c

@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"

libc/stdio/vsscanf.c

@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 
 struct StringScannerState {
   const unsigned char *s;