Clean up more code

- Found some bugs in LLVM compiler-rt library
- The useless LIBC_STUBS package is now deleted
- Improve the overflow checking story even further
- Get chibicc tests working in MODE=dbg mode again
- The libc/isystem/ headers now have correctly named guards

examples/clock.c

@@ -7,10 +7,10 @@
 │   • http://creativecommons.org/publicdomain/zero/1.0/            │
 ╚─────────────────────────────────────────────────────────────────*/
 #endif
+#include "libc/calls/calls.h"
 #include "libc/calls/struct/timespec.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
-#include "libc/time/time.h"
 
 /**
  * @fileoverview clock() function demo

examples/examples.mk

@@ -59,7 +59,6 @@ EXAMPLES_DIRECTDEPS =								\
 	LIBC_SOCK								\
 	LIBC_STDIO								\
 	LIBC_STR								\
-	LIBC_STUBS								\
 	LIBC_SYSV								\
 	LIBC_SYSV_CALLS								\
 	LIBC_TESTLIB								\
@@ -77,10 +76,10 @@ EXAMPLES_DIRECTDEPS =								\
 	THIRD_PARTY_DOUBLECONVERSION						\
 	THIRD_PARTY_GDTOA							\
 	THIRD_PARTY_GETOPT							\
+	THIRD_PARTY_HIREDIS							\
 	THIRD_PARTY_LIBCXX							\
 	THIRD_PARTY_LINENOISE							\
 	THIRD_PARTY_LUA								\
-	THIRD_PARTY_HIREDIS							\
 	THIRD_PARTY_MBEDTLS							\
 	THIRD_PARTY_MUSL							\
 	THIRD_PARTY_NSYNC							\

examples/package/build.mk

@@ -43,7 +43,6 @@ EXAMPLES_PACKAGE_DIRECTDEPS =				\
 	EXAMPLES_PACKAGE_LIB				\
 	LIBC_INTRIN					\
 	LIBC_STDIO					\
-	LIBC_STUBS					\
 	LIBC_TINYMATH
 
 # Evaluates the set of transitive package dependencies.

examples/package/lib/build.mk

@@ -69,10 +69,9 @@ EXAMPLES_PACKAGE_LIB_A_CHECKS =					\
 # Lists packages whose symbols are or may be directly referenced here.
 # Note that linking stubs is always a good idea due to synthetic code.
 EXAMPLES_PACKAGE_LIB_A_DIRECTDEPS =				\
-	LIBC_STDIO						\
 	LIBC_INTRIN						\
 	LIBC_NEXGEN32E						\
-	LIBC_STUBS
+	LIBC_STDIO
 
 # Evaluates variable as set of transitive package dependencies.
 EXAMPLES_PACKAGE_LIB_A_DEPS :=					\

examples/whois.c

@@ -32,7 +32,6 @@
 #include "libc/dns/dns.h"
 #include "libc/errno.h"
 #include "libc/log/bsd.h"
-#include "libc/mem/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/sock/struct/pollfd.h"