Compiler warnings on mingw-w64

d:/Compiler/gcc-4.9.3/mingw_32/bin/gcc  -I"D:/RCompile/recent/R/include" -DNDEBUG -I../windows/openssl-1.1.1/include -I. -Icommon -DBSON_COMPILATION -DMONGOC_COMPILATION -DMONGOC_HAVE_SASL_CLIENT_DONE -D__USE_MINGW_ANSI_STDIO    -I"d:/Compiler/gcc-4.9.3/local330/include"  -Wno-deprecated-declarations   -pedantic -O2 -Wall  -std=gnu99 -mtune=core2 -c mongoc/mongoc-util.c -o mongoc/mongoc-util.o

mongoc/mongoc-util.c: In function '_mongoc_rand_simple':

mongoc/mongoc-util.c:53:7: warning: spurious trailing '%' in format [-Wformat=]

       MONGOC_ERROR ("rand_s failed: %");

       ^ 

d:/Compiler/gcc-4.9.3/mingw_32/bin/gcc  -I"D:/RCompile/recent/R/include" -DNDEBUG -I../windows/openssl-1.1.1/include -I. -Icommon -DBSON_COMPILATION -DMONGOC_COMPILATION -DMONGOC_HAVE_SASL_CLIENT_DONE -D__USE_MINGW_ANSI_STDIO    -I"d:/Compiler/gcc-4.9.3/local330/include"  -Wno-deprecated-declarations   -pedantic -O2 -Wall  -std=gnu99 -mtune=core2 -c mongoc/mongoc-topology.c -o mongoc/mongoc-topology.o

In file included from mongoc/mongoc-thread-private.h:24:0,

                 from mongoc/mongoc-topology-private.h:26,

                 from mongoc/mongoc-topology.c:25:

mongoc/mongoc-topology.c: In function '_mongoc_topology_start_background_scanner':

common/common-thread-private.h:58:38: warning: ISO C forbids conversion of function pointer to object pointer type [-Wpedantic]

    (!(*(_t) = CreateThread (NULL, 0, (void *) _f, _d, 0, NULL)))

                                      ^

mongoc/mongoc-topology.c:1352:8: note: in expansion of macro 'bson_thread_create'

    r = bson_thread_create (

        ^

common/common-thread-private.h:58:38: warning: ISO C forbids passing argument 3 of 'CreateThread' between function pointer and 'void *' [-Wpedantic]

    (!(*(_t) = CreateThread (NULL, 0, (void *) _f, _d, 0, NULL)))

                                      ^

mongoc/mongoc-topology.c:1352:8: note: in expansion of macro 'bson_thread_create'

    r = bson_thread_create (

        ^

In file included from D:/Compiler/gcc-4.9.3/mingw_32/i686-w64-mingw32/include/winbase.h:29:0,

                 from D:/Compiler/gcc-4.9.3/mingw_32/i686-w64-mingw32/include/windows.h:70,

                 from D:/Compiler/gcc-4.9.3/mingw_32/i686-w64-mingw32/include/winsock2.h:23,

                 from ./bson/bson-compat.h:48,

                 from ./bson/bson.h:23,

                 from mongoc/mongoc-handshake.h:23,

                 from mongoc/mongoc-topology.c:19:

D:/Compiler/gcc-4.9.3/mingw_32/i686-w64-mingw32/include/processthreadsapi.h:84:28: note: expected 'LPTHREAD_START_ROUTINE' but argument is of type 'void *'

   WINBASEAPI HANDLE WINAPI CreateThread (LPSECURITY_ATTRIBUTES lpThreadAttributes, SIZE_T dwStackSize, LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId);

                            ^

d:/Compiler/gcc-4.9.3/mingw_32/bin/gcc  -I"D:/RCompile/recent/R/include" -DNDEBUG -I../windows/openssl-1.1.1/include -I. -Icommon -DBSON_COMPILATION -DMONGOC_COMPILATION -DMONGOC_HAVE_SASL_CLIENT_DONE -D__USE_MINGW_ANSI_STDIO    -I"d:/Compiler/gcc-4.9.3/local330/include"  -Wno-deprecated-declarations   -pedantic -O2 -Wall  -std=gnu99 -mtune=core2 -c mongoc/mongoc-openssl.c -o mongoc/mongoc-openssl.o

mongoc/mongoc-openssl.c: In function '_mongoc_openssl_import_cert_store':

mongoc/mongoc-openssl.c:133:7: warning: format '%X' expects argument of type 'unsigned int', but argument 4 has type 'DWORD' [-Wformat=]

       MONGOC_ERROR ("Can't open CA store: 0x%.8X: '%s'", GetLastError (), msg);

       ^