Using WIN32 and UNIX variables

WIN32 is true when the target system is Microsoft Windows, 32 and
64 bits.

UNIX is true when the target system is Unix or Unix-like (i.e. Apple,
BSD and CYGWIN).
Signed-off-by: Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>

CMakeLists.txt

@@ -43,9 +43,9 @@ IF(PAHO_BUILD_DOCUMENTATION)
 ENDIF()
 
 ### packaging settings
-IF (CMAKE_SYSTEM_NAME MATCHES "Windows")
+IF (WIN32)
     SET(CPACK_GENERATOR "ZIP")
-ELSE()
+ELSEIF(UNIX)
     SET(CPACK_GENERATOR "TGZ")
 ENDIF()
 

src/CMakeLists.txt

@@ -47,10 +47,14 @@ SET(common_src
     LinkedList.c
     )
 
-IF (CMAKE_SYSTEM_NAME MATCHES "Windows")
+IF (WIN32)
     SET(LIBS_SYSTEM ws2_32)
-ELSEIF (CMAKE_SYSTEM_NAME MATCHES "Linux")
-    SET(LIBS_SYSTEM dl)
+ELSEIF (UNIX)
+    IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
+        SET(LIBS_SYSTEM c dl)
+    ELSE()
+        SET(LIBS_SYSTEM c)
+    ENDIF()
 ENDIF()
 
 ADD_EXECUTABLE(MQTTVersion MQTTVersion.c)