base: fix cxx library compile errors with GCC 8.3.0

Fixes #3322

repos/base/lib/symbols/ld

@@ -582,6 +582,7 @@ _ZThn8_N6Genode23Alarm_timeout_scheduler14handle_timeoutENS_8DurationE T
 _ZThn8_N6Genode23Alarm_timeout_schedulerD0Ev T
 _ZThn8_N6Genode23Alarm_timeout_schedulerD1Ev T
 _ZdlPv W
+_ZdlPvm W
 _ZdlPvPN6Genode11DeallocatorE T
 _ZdlPvPN6Genode9AllocatorE W
 _ZdlPvRN6Genode11DeallocatorE T

repos/base/src/lib/cxx/exception.cc

@@ -14,6 +14,7 @@
 
 /* libsupc++ includes */
 #include <cxxabi.h>
+#include <exception>
 
 /* Genode includes */
 #include <base/log.h>

repos/base/src/lib/cxx/malloc_free.cc

@@ -64,7 +64,7 @@ void Genode::init_cxx_heap(Env &env)
 typedef unsigned long Block_header;
 
 
-extern "C" void *malloc(unsigned size)
+extern "C" void *malloc(size_t size)
 {
 	/* enforce size to be a multiple of 4 bytes */
 	size = (size + 3) & ~3;
@@ -85,7 +85,7 @@ extern "C" void *malloc(unsigned size)
 }
 
 
-extern "C" void *calloc(unsigned nmemb, unsigned size)
+extern "C" void *calloc(size_t nmemb, size_t size)
 {
 	void *addr = malloc(nmemb*size);
 	Genode::memset(addr, 0, nmemb*size);

repos/base/src/lib/cxx/misc.cc

@@ -13,10 +13,12 @@
 
 /* libsupc++ includes */
 #include <cxxabi.h>
+#include <exception>
 
 /* Genode includes */
 #include <base/env.h>
 #include <base/log.h>
+#include <base/sleep.h>
 #include <base/stdint.h>
 #include <base/thread.h>
 #include <util/string.h>
@@ -106,7 +108,7 @@ extern "C" __attribute__((weak)) void raise()
  ** Support for libsupc++ **
  ***************************/
 
-extern "C" void *abort(void)
+extern "C" void abort(void)
 {
 	Genode::Thread const * const myself = Genode::Thread::myself();
 	Genode::Thread::Name name = "unknown";
@@ -120,22 +122,22 @@ extern "C" void *abort(void)
 	if (name != "main")
 		genode_exit(1);
 
+	Genode::sleep_forever();
+}
+
+
+extern "C" int fputc(int, void*) {
 	return 0;
 }
 
 
-extern "C" void *fputc(void) {
-	return 0;
-}
-
-
-extern "C" void *fputs(const char *s, void *) {
+extern "C" int fputs(const char *s, void *) {
 	Genode::warning("C++ runtime: ", s);
 	return 0;
 }
 
 
-extern "C" void *fwrite(void) {
+extern "C" size_t fwrite(const void*, size_t, size_t, void*) {
 	return 0;
 }
 
@@ -147,14 +149,14 @@ extern "C" int memcmp(const void *p0, const void *p1, size_t size)
 
 
 extern "C" __attribute__((weak))
-void *memcpy(void *dst, void *src, size_t n)
+void *memcpy(void *dst, const void *src, size_t n)
 {
 	return Genode::memcpy(dst, src, n);
 }
 
 
 extern "C" __attribute__((weak))
-void *memmove(void *dst, void *src, size_t n)
+void *memmove(void *dst, const void *src, size_t n)
 {
 	return Genode::memmove(dst, src, n);
 }
@@ -180,7 +182,7 @@ struct FILE;
 FILE *__stderrp;
 
 
-extern "C" void *strcat(void)
+extern "C" char *strcat(char *, const char *)
 {
 	Genode::warning("strcat - not yet implemented");
 	return 0;

repos/base/src/lib/cxx/new_delete.cc

@@ -72,3 +72,9 @@ __attribute__((weak)) void operator delete (void *)
 	Genode::error("cxx: operator delete (void *) called - not implemented. "
 	              "A working implementation is available in the 'stdcxx' library.");
 }
+
+__attribute__((weak)) void operator delete (void *, unsigned long)
+{
+	Genode::error("cxx: operator delete (void *, unsigned long) called - not implemented. "
+	              "A working implementation is available in the 'stdcxx' library.");
+}