[PATCH 01/10] various: Fix type conflict of GLib function pointers

[Kohei Tokunaga]

On emscripten, function pointer casts can cause function call failure.
This commit fixes the function definition to match to the type of the
function call.

- qtest_set_command_cb passed to g_once should match to GThreadFunc
- object_class_cmp and cpreg_key_compare are passed to g_list_sort as
  GCopmareFunc but GLib cast them to GCompareDataFunc.

Signed-off-by: Kohei Tokunaga <ktokunaga.m...@gmail.com>
---
 hw/riscv/riscv_hart.c | 9 ++++++++-
 qom/object.c          | 5 +++--
 target/arm/helper.c   | 4 ++--
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/hw/riscv/riscv_hart.c b/hw/riscv/riscv_hart.c
index a55d156668..e37317dcbd 100644
--- a/hw/riscv/riscv_hart.c
+++ b/hw/riscv/riscv_hart.c
@@ -102,10 +102,17 @@ static bool csr_qtest_callback(CharBackend *chr, gchar 
**words)
     return false;
 }
 
+static gpointer g_qtest_set_command_cb(
+    bool (*pc_cb)(CharBackend *chr, gchar **words))
+{
+    qtest_set_command_cb(pc_cb);
+    return NULL;
+}
+
 static void riscv_cpu_register_csr_qtest_callback(void)
 {
     static GOnce once;
-    g_once(&once, (GThreadFunc)qtest_set_command_cb, csr_qtest_callback);
+    g_once(&once, (GThreadFunc)g_qtest_set_command_cb, csr_qtest_callback);
 }
 #endif
 
diff --git a/qom/object.c b/qom/object.c
index 01618d06bd..19698aae4c 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1191,7 +1191,8 @@ GSList *object_class_get_list(const char *implements_type,
     return list;
 }
 
-static gint object_class_cmp(gconstpointer a, gconstpointer b)
+static gint object_class_cmp(gconstpointer a, gconstpointer b,
+                             gpointer user_data)
 {
     return strcasecmp(object_class_get_name((ObjectClass *)a),
                       object_class_get_name((ObjectClass *)b));
@@ -1201,7 +1202,7 @@ GSList *object_class_get_list_sorted(const char 
*implements_type,
                                      bool include_abstract)
 {
     return g_slist_sort(object_class_get_list(implements_type, 
include_abstract),
-                        object_class_cmp);
+                        (GCompareFunc)object_class_cmp);
 }
 
 Object *object_ref(void *objptr)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index bb445e30cd..68f81fadfc 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -220,7 +220,7 @@ static void count_cpreg(gpointer key, gpointer opaque)
     }
 }
 
-static gint cpreg_key_compare(gconstpointer a, gconstpointer b)
+static gint cpreg_key_compare(gconstpointer a, gconstpointer b, void *d)
 {
     uint64_t aidx = cpreg_to_kvm_id((uintptr_t)a);
     uint64_t bidx = cpreg_to_kvm_id((uintptr_t)b);
@@ -244,7 +244,7 @@ void init_cpreg_list(ARMCPU *cpu)
     int arraylen;
 
     keys = g_hash_table_get_keys(cpu->cp_regs);
-    keys = g_list_sort(keys, cpreg_key_compare);
+    keys = g_list_sort(keys, (GCompareFunc)cpreg_key_compare);
 
     cpu->cpreg_array_len = 0;
 
-- 
2.25.1