Merge pull request #214 from orpiske/openssl-osx-fix

Proposed fix for OpenSSL compilation issue on OS X

.travis.yml

@@ -8,5 +8,9 @@ os:
   - linux
   - osx
 
+before_install:
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install openssl ; fi
+
 script:
-  - make
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then mkdir build.paho ; cd build.paho; cmake -DPAHO_WITH_SSL=TRUE -DPAHO_BUILD_DOCUMENTATION=FALSE -DPAHO_BUILD_SAMPLES=TRUE .. ; make ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make ; fi

src/CMakeLists.txt

@@ -70,19 +70,33 @@ INSTALL(FILES MQTTAsync.h MQTTClient.h MQTTClientPersistence.h
     DESTINATION include)
 
 IF (PAHO_WITH_SSL)
-    SET(OPENSSL_LIB_SEARCH_PATH "" CACHE PATH "Directory containing OpenSSL libraries")
+SET(OPENSSL_LIB_SEARCH_PATH "" CACHE PATH "Directory containing OpenSSL libraries")
     SET(OPENSSL_INC_SEARCH_PATH "" CACHE PATH "Directory containing OpenSSL includes")
-    SET(OPENSSL_LIBRARIES ssl crypto)
-    LINK_DIRECTORIES(
-        ${OPENSSL_LIB_SEARCH_PATH}
-        )
+
+    IF (${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
+      SET(OPENSSL_BREW_PATH "/usr/local/opt/openssl")
+    ENDIF (${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
+
+    FIND_PATH(OPENSSL_INCLUDE_DIR openssl/ssl.h
+        HINTS ${OPENSSL_INC_SEARCH_PATH}/include ${OPENSSL_BREW_PATH}/include/)
+    FIND_LIBRARY(OPENSSL_LIB NAMES ssl libssl
+        HINTS ${OPENSSL_BREW_PATH}/lib ${OPENSSL_DIR}/lib ${OPENSSL_DIR}/lib64)
+    FIND_LIBRARY(OPENSSLCRYPTO_LIB NAMES ssl libssl
+      	HINTS ${OPENSSL_BREW_PATH}/lib ${OPENSSL_DIR}/lib ${OPENSSL_DIR}/lib64)
+
+    MESSAGE(STATUS "OpenSSL hint ${PENSSL_INC_SEARCH_PATH} (includes) / ")
+    MESSAGE(STATUS "OpenSSL headers found at ${OPENSSL_INCLUDE_DIR}")
+    MESSAGE(STATUS "OpenSSL library found at ${OPENSSL_LIB}")
+    MESSAGE(STATUS "OpenSSL Crypto library found at ${OPENSSLCRYPTO_LIB}")
+
     INCLUDE_DIRECTORIES(
-        ${OPENSSL_INC_SEARCH_PATH}
+        ${OPENSSL_INCLUDE_DIR}
     )
     ADD_LIBRARY(paho-mqtt3cs SHARED ${common_src} MQTTClient.c SSLSocket.c)
     ADD_LIBRARY(paho-mqtt3as SHARED ${common_src} MQTTAsync.c SSLSocket.c)
-    TARGET_LINK_LIBRARIES(paho-mqtt3cs pthread ${OPENSSL_LIBRARIES} ${LIBS_SYSTEM})
-    TARGET_LINK_LIBRARIES(paho-mqtt3as pthread ${OPENSSL_LIBRARIES} ${LIBS_SYSTEM})
+
+    TARGET_LINK_LIBRARIES(paho-mqtt3cs pthread ${OPENSSL_LIB} ${OPENSSLCRYPTO_LIB} ${LIBS_SYSTEM})
+    TARGET_LINK_LIBRARIES(paho-mqtt3as pthread ${OPENSSL_LIB} ${OPENSSLCRYPTO_LIB} ${LIBS_SYSTEM})
     SET_TARGET_PROPERTIES(
         paho-mqtt3cs paho-mqtt3as PROPERTIES
         VERSION ${CLIENT_VERSION}
@@ -95,4 +109,3 @@ IF (PAHO_WITH_SSL)
         RUNTIME DESTINATION bin
         LIBRARY DESTINATION lib)
 ENDIF()
-