Mingw compile error

[JanSchmidt3]

make bin/simple_publisher bin/simple_subscriber bin/reconnect_subscriber bin/bio_publisher bin/openssl_publisher
gcc -Wextra -Wall -std=gnu99 -Iinclude -Wno-unused-parameter -Wno-unused-variable -Wno-duplicate-decl-specifier examples/simple_publisher.c src/mqtt.c src/mqtt_pal.c -lpthread -lws2_32 -o bin/simple_publisher
In file included from include/mqtt.h:43:0,
                 from examples/simple_publisher.c:11:
include/mqtt_pal.h:128:21: error: conflicting types for 'ssize_t'
In file included from c:\home\projekte\svn\rdussmaster\tools\mingw-gcc\bin\../lib/gcc/mingw32/4.7.2/../../../../include/io.h:20:0,
                 from c:\home\projekte\svn\rdussmaster\tools\mingw-gcc\bin\../lib/gcc/mingw32/4.7.2/../../../../include/unistd.h:12,
                 from examples/simple_publisher.c:6:
c:\home\projekte\svn\rdussmaster\tools\mingw-gcc\bin\../lib/gcc/mingw32/4.7.2/../../../../include/sys/types.h:118:18: note: previous declaration of 'ssize_t' was here
In file included from examples/simple_publisher.c:12:0:
examples/templates/posix_sockets.h: In function 'open_nb_socket':
examples/templates/posix_sockets.h:32:5: warning: implicit declaration of function 'getaddrinfo' [-Wimplicit-function-declaration]
examples/templates/posix_sockets.h:54:5: warning: implicit declaration of function 'freeaddrinfo' [-Wimplicit-function-declaration]
examples/templates/posix_sockets.h:60:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
examples/templates/posix_sockets.h:62:9: warning: passing argument 3 of 'ioctlsocket' from incompatible pointer type [enabled by default]
In file included from include/mqtt_pal.h:123:0,
                 from include/mqtt.h:43,
                 from examples/simple_publisher.c:11:
c:\home\projekte\svn\rdussmaster\tools\mingw-gcc\bin\../lib/gcc/mingw32/4.7.2/../../../../include/winsock2.h:540:32: note: expected 'u_long *' but argument is of type 'int *'
examples/simple_publisher.c: In function 'main':
examples/simple_publisher.c:130:5: warning: implicit declaration of function 'sleep' [-Wimplicit-function-declaration]
examples/simple_publisher.c: At top level:
cc1.exe: warning: unrecognized command line option "-Wno-duplicate-decl-specifier" [enabled by default]
make: *** [bin/simple_publisher] Error 1