includes: Resolve some minor C++ incompatibilties

include/qemu/bitmap.h

@@ -70,7 +70,7 @@
         unsigned long name[BITS_TO_LONGS(bits)]
 
 #define small_nbits(nbits)                      \
-        ((nbits) <= BITS_PER_LONG)
+        ((unsigned long)(nbits) <= BITS_PER_LONG)
 
 int slow_bitmap_empty(const unsigned long *bitmap, long bits);
 int slow_bitmap_full(const unsigned long *bitmap, long bits);
@@ -93,7 +93,7 @@ long slow_bitmap_count_one(const unsigned long *bitmap, long nbits);
 static inline unsigned long *bitmap_try_new(long nbits)
 {
     long len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
-    return g_try_malloc0(len);
+    return (unsigned long *)g_try_malloc0(len);
 }
 
 static inline unsigned long *bitmap_new(long nbits)
@@ -265,9 +265,9 @@ static inline unsigned long *bitmap_zero_extend(unsigned long *old,
                                                 long old_nbits, long new_nbits)
 {
     long new_len = BITS_TO_LONGS(new_nbits) * sizeof(unsigned long);
-    unsigned long *new = g_realloc(old, new_len);
-    bitmap_clear(new, old_nbits, new_nbits - old_nbits);
-    return new;
+    unsigned long *new_ = (unsigned long *)g_realloc(old, new_len);
+    bitmap_clear(new_, old_nbits, new_nbits - old_nbits);
+    return new_;
 }
 
 void bitmap_to_le(unsigned long *dst, const unsigned long *src,

include/qemu/compiler.h

@@ -90,7 +90,11 @@
  * message (but as it remains present in the source code, it can still
  * be useful when debugging). */
 #if defined(CONFIG_STATIC_ASSERT)
+#ifdef __cplusplus
+#define QEMU_BUILD_BUG_MSG(x, msg) static_assert(!(x), msg)
+#else
 #define QEMU_BUILD_BUG_MSG(x, msg) _Static_assert(!(x), msg)
+#endif
 #elif defined(__COUNTER__)
 #define QEMU_BUILD_BUG_MSG(x, msg) typedef QEMU_BUILD_BUG_ON_STRUCT(x) \
     glue(qemu_build_bug_on__, __COUNTER__) __attribute__((unused))

include/qemu/timer.h

@@ -527,7 +527,7 @@ static inline QEMUTimer *timer_new_full(QEMUTimerListGroup *timer_list_group,
                                         int scale, int attributes,
                                         QEMUTimerCB *cb, void *opaque)
 {
-    QEMUTimer *ts = g_malloc0(sizeof(QEMUTimer));
+    QEMUTimer *ts = (QEMUTimer *)g_malloc0(sizeof(QEMUTimer));
     timer_init_full(ts, timer_list_group, type, scale, attributes, cb, opaque);
     return ts;
 }

include/qom/object.h

@@ -14,6 +14,11 @@
 #ifndef QEMU_OBJECT_H
 #define QEMU_OBJECT_H
 
+#ifdef __cplusplus
+#define class qom_class
+#define typename qom_typename
+#endif
+
 #include "qapi/qapi-builtin-types.h"
 #include "qemu/module.h"
 
@@ -1884,4 +1889,9 @@ char *object_property_help(const char *name, const char *type,
 
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(Object, object_unref)
 
+#ifdef __cplusplus
+#undef class
+#undef typename
+#endif
+
 #endif