Fix GCC 12 dangling-pointer warning

We're storing a persistent pointer to an ephemeral local variable
which technically is a dangling pointer and the compiler is correct.
However, since we never indirect the pointer, this is a safe
operation and we can suppress the warning.

Also, some C run-times (like MUSL) aren't including <stdint.h>
indirectly so we must include it explicitly or we won't have the
type definition for uintptr_t.

Fixes issue #867.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

source/components/utilities/utdebug.c

@@ -185,7 +185,12 @@ AcpiUtInitStackPtrTrace (
     ACPI_SIZE               CurrentSp;
 
 
+#pragma GCC diagnostic push
+#if defined(__GNUC__) && __GNUC__ >= 12
+#pragma GCC diagnostic ignored "-Wdangling-pointer="
+#endif
     AcpiGbl_EntryStackPointer = &CurrentSp;
+#pragma GCC diagnostic pop
 }
 
 

source/include/platform/aclinux.h

@@ -312,6 +312,7 @@
 #ifdef ACPI_USE_STANDARD_HEADERS
 #include <stddef.h>
 #include <unistd.h>
+#include <stdint.h>
 
 #define ACPI_OFFSET(d, f)   offsetof(d, f)
 #endif