Get repository to build with GCC 11

See #594

third_party/libcxx/__config

@@ -16,6 +16,7 @@
 #define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
 #define _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
 #define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
+#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
 
 #if defined(_MSC_VER) && !defined(__clang__)
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)

third_party/libcxx/algorithm.cc

@@ -55,8 +55,10 @@ template unsigned __sort5<__less<long double>&, long double*>(long double*, long
 #ifndef _LIBCPP_HAS_NO_THREADS
 _LIBCPP_SAFE_STATIC static __libcpp_mutex_t __rs_mut = _LIBCPP_MUTEX_INITIALIZER;
 #endif
-unsigned __rs_default::__c_ = 0;
 
+#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE) \
+  || defined(_LIBCPP_BUILDING_LIBRARY)
+unsigned __rs_default::__c_ = 0;
 __rs_default::__rs_default()
 {
 #ifndef _LIBCPP_HAS_NO_THREADS
@@ -64,12 +66,10 @@ __rs_default::__rs_default()
 #endif
     __c_ = 1;
 }
-
 __rs_default::__rs_default(const __rs_default&)
 {
     ++__c_;
 }
-
 __rs_default::~__rs_default()
 {
 #ifndef _LIBCPP_HAS_NO_THREADS
@@ -79,13 +79,13 @@ __rs_default::~__rs_default()
     --__c_;
 #endif
 }
-
 __rs_default::result_type
 __rs_default::operator()()
 {
     static mt19937 __rs_g;
     return __rs_g();
 }
+#endif
 
 __rs_default
 __rs_get()

third_party/libcxx/exception_fallback.hh

@@ -14,23 +14,25 @@
 namespace std {
 
 _LIBCPP_SAFE_STATIC static std::terminate_handler __terminate_handler;
-_LIBCPP_SAFE_STATIC static std::unexpected_handler __unexpected_handler;
 
+#if _LIBCPP_STD_VER <= 14 ||                                                   \
+    defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS) ||              \
+    defined(_LIBCPP_BUILDING_LIBRARY)
+_LIBCPP_SAFE_STATIC static std::unexpected_handler __unexpected_handler;
 // libcxxrt provides implementations of these functions itself.
 unexpected_handler set_unexpected(unexpected_handler func) _NOEXCEPT {
   return __libcpp_atomic_exchange(&__unexpected_handler, func);
 }
-
 unexpected_handler get_unexpected() _NOEXCEPT {
   return __libcpp_atomic_load(&__unexpected_handler);
 }
-
 _LIBCPP_NORETURN
 void unexpected() {
   (*get_unexpected())();
   // unexpected handler should not return
   terminate();
 }
+#endif
 
 terminate_handler set_terminate(terminate_handler func) _NOEXCEPT {
   return __libcpp_atomic_exchange(&__terminate_handler, func);

third_party/make/read.c

@@ -427,7 +427,9 @@ eval_makefile (const char *filename, unsigned short flags)
   fclose (ebuf.fp);
 
   free (ebuf.bufstart);
-  alloca (0);
+
+  /* [jart] breaks gcc11 (also wat) */
+  void *volatile wat = alloca (0);
 
   errno = 0;
   return deps;
@@ -469,7 +471,8 @@ eval_buffer (char *buffer, const floc *flocp)
 
   reading_file = curfile;
 
-  alloca (0);
+  /* [jart] breaks gcc11 (also wat) */
+  void *volatile wat = alloca (0);
 }
 
 /* Check LINE to see if it's a variable assignment or undefine.
@@ -2495,7 +2498,8 @@ find_percent_cached (const char **string)
         if (! new)
           {
             slen = strlen (*string);
-            new = alloca (slen + 1);
+            /* [jart] can't prove alloca() isn't returned; let's just leak */
+            new = malloc (slen + 1);
             memcpy (new, *string, slen + 1);
             p = new + (p - *string);
             *string = new;

third_party/make/remake.c

@@ -322,7 +322,7 @@ update_file (struct file *file, unsigned int depth)
       check_renamed (f);
 
       /* Clean up any alloca() used during the update.  */
-      alloca (0);
+      void *volatile wat = alloca (0);
 
       /* If we got an error, don't bother with double_colon etc.  */
       if (new && !keep_going_flag)

third_party/mbedtls/bigmul4.c

@@ -29,7 +29,7 @@
  * @note words are host endian while array is little endian
  * @mayalias
  */
-void (*Mul4x4)(uint64_t C[8], const uint64_t A[4], const uint64_t B[4]);
+void (*Mul4x4)(uint64_t C[16], const uint64_t A[8], const uint64_t B[8]);
 
 static textstartup void Mul4x4Init()
 {
@@ -38,7 +38,7 @@ static textstartup void Mul4x4Init()
 
 const void *const Mul4x4Ctor[] initarray = {Mul4x4Init};
 
-void Mul4x4Pure(uint64_t C[8], const uint64_t A[4], const uint64_t B[4])
+void Mul4x4Pure(uint64_t C[16], const uint64_t A[8], const uint64_t B[8])
 {
     uint128_t t;
     uint64_t h, c1, c2, c3;

third_party/mbedtls/test/test_suite_ssl.c

@@ -2699,7 +2699,7 @@ void test_ssl_message_queue_insufficient_buffer_wrapper( void ** params )
 void test_ssl_message_mock_uninitialized( )
 {
     enum { MSGLEN = 10 };
-    unsigned char message[MSGLEN], received[MSGLEN];
+    unsigned char message[MSGLEN] = {0}, received[MSGLEN];
     mbedtls_mock_socket client, server;
     mbedtls_test_message_queue server_queue, client_queue;
     mbedtls_test_message_socket_context server_context, client_context;

third_party/python/Modules/_decimal/libmpdec/io.c

@@ -38,6 +38,10 @@
 #include "third_party/python/Modules/_decimal/libmpdec/typearith.h"
 /* clang-format off */
 
+#if __GNUC__ >= 11
+#pragma GCC diagnostic ignored "-Wmisleading-indentation"
+#endif
+
 asm(".ident\t\"\\n\\n\
 libmpdec (BSD-2)\\n\
 Copyright 2008-2016 Stefan Krah\"");

third_party/python/Modules/expat/xmltok_ns.inc

@@ -90,7 +90,7 @@ NS(XmlInitEncoding)(INIT_ENCODING *p, const ENCODING **encPtr,
 static const ENCODING *
 NS(findEncoding)(const ENCODING *enc, const char *ptr, const char *end) {
 #  define ENCODING_MAX 128
-  char buf[ENCODING_MAX];
+  char buf[ENCODING_MAX] = {0}; /* [jart] wut */
   char *p = buf;
   int i;
   XmlUtf8Convert(enc, &ptr, end, &p, p + ENCODING_MAX - 1);

third_party/sqlite3/build.c

@@ -24,6 +24,10 @@
 */
 #include "third_party/sqlite3/sqliteInt.inc"
 
+#if __GNUC__ >= 11
+#pragma GCC diagnostic ignored "-Wmisleading-indentation"
+#endif
+
 /* clang-format off */
 
 #ifndef SQLITE_OMIT_SHARED_CACHE
@@ -4230,7 +4234,7 @@ void sqlite3DefaultRowEst(Index *pIdx){
   if( x<99 ){
     pIdx->pTable->nRowLogEst = x = 99;
   }
-  if( pIdx->pPartIdxWhere!=0 ) x -= 10;  assert( 10==sqlite3LogEst(2) );
+  if( pIdx->pPartIdxWhere!=0 ) x -= 10;  /*assert( 10==sqlite3LogEst(2) );*/
   a[0] = x;
 
   /* Estimate that a[1] is 10, a[2] is 9, a[3] is 8, a[4] is 7, a[5] is

third_party/sqlite3/fts5.c

@@ -14170,10 +14170,13 @@ static int sqlite3Fts5IndexQuery(
   /* If the QUERY_SCAN flag is set, all other flags must be clear. */
   assert( (flags & FTS5INDEX_QUERY_SCAN)==0 || flags==FTS5INDEX_QUERY_SCAN );
 
+  /* [jart] what is with these gcc11 warnings */
+  void *MemCpy(void *, const void *, size_t) asm("memcpy");
+
   if( sqlite3Fts5BufferSize(&p->rc, &buf, nToken+1)==0 ){
     int iIdx = 0;                 /* Index to search */
     int iPrefixIdx = 0;           /* +1 prefix index */
-    if( nToken ) memcpy(&buf.p[1], pToken, nToken);
+    if( nToken ) MemCpy(&buf.p[1], pToken, nToken);
 
     /* Figure out which index to search and set iIdx accordingly. If this
     ** is a prefix query for which there is no prefix index, set iIdx to

third_party/sqlite3/where.c

@@ -20,6 +20,10 @@
 #include "third_party/sqlite3/whereInt.inc"
 /* clang-format off */
 
+#if __GNUC__ >= 11
+#pragma GCC diagnostic ignored "-Wmisleading-indentation"
+#endif
+
 /*
 ** Extra information appended to the end of sqlite3_index_info but not
 ** visible to the xBestIndex function, at least not directly.  The

third_party/tidy/access.c

@@ -891,7 +891,7 @@ static Bool CompareColors( const int rgbBG[3], const int rgbFG[3] )
 * blue = 5.
 *********************************************************************/
 
-static Bool GetRgb( ctmbstr color, int rgb[] )
+static Bool GetRgb( ctmbstr color, int rgb[3] )
 {
     uint x;
 

third_party/tidy/attrs.c

@@ -14,6 +14,10 @@
 #include "libc/fmt/fmt.h"
 #include "third_party/tidy/utf8.h"
 
+#if __GNUC__ >= 11 /* [jart] this one looks legit */
+#pragma GCC diagnostic ignored "-Wmisleading-indentation"
+#endif
+
 /*
  Bind attribute types to procedures to check values.
  You can add new procedures for better validation

third_party/unzip/unzip.c

@@ -75,6 +75,10 @@
 #include "third_party/unzip/unzvers.h"
 #include "third_party/unzip/globals.h"
 
+#if __GNUC__ >= 11 /* [jart] worth looking into */
+#pragma GCC diagnostic ignored "-Wrestrict"
+#endif
+
 #ifndef WINDLL          /* The WINDLL port uses windll/windll.c instead... */
 
 /***************************/

third_party/unzip/unzip.mk

@@ -59,6 +59,10 @@ $(THIRD_PARTY_UNZIP_A_OBJS): private						\
 			-DHAVE_TERMIOS_H					\
 			-DNO_LCHMOD
 
+$(THIRD_PARTY_UNZIP_A_OBJS): private						\
+		OVERRIDE_CFLAGS +=						\
+			$(OLD_CODE)
+
 THIRD_PARTY_UNZIP_COMS = o/$(MODE)/third_party/unzip/unzip.com
 THIRD_PARTY_UNZIP_BINS = $(THIRD_PARTY_UNZIP_COMS) $(THIRD_PARTY_UNZIP_COMS:%=%.dbg)
 THIRD_PARTY_UNZIP_LIBS = $(foreach x,$(THIRD_PARTY_UNZIP_ARTIFACTS),$($(x)))