Fix FindOpenSSL on mingw. This has been reported to be working by ctrlaltca libero.it on cmake mailing list.

Modules/FindOpenSSL.cmake

@@ -20,79 +20,86 @@
 # (To distributed this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
-IF(OPENSSL_LIBRARIES)
-   SET(OpenSSL_FIND_QUIETLY TRUE)
-ENDIF(OPENSSL_LIBRARIES)
-
-IF(SSL_EAY_DEBUG AND SSL_EAY_RELEASE)
-   SET(LIB_FOUND 1)
-ENDIF(SSL_EAY_DEBUG AND SSL_EAY_RELEASE)
-
 # http://www.slproweb.com/products/Win32OpenSSL.html
 FIND_PATH(OPENSSL_INCLUDE_DIR openssl/ssl.h
   PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/include"
 )
 
-IF(WIN32 AND MSVC)
-   # /MD and /MDd are the standard values - if somone wants to use
-   # others, the libnames have to change here too
-   # use also ssl and ssleay32 in debug as fallback for openssl < 0.9.8b
-
-   FIND_LIBRARY(LIB_EAY_DEBUG NAMES libeay32MDd libeay32
-     PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/VC"
-     )
-   FIND_LIBRARY(LIB_EAY_RELEASE NAMES libeay32MD libeay32
-     PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/VC"
-     )
-   FIND_LIBRARY(SSL_EAY_DEBUG NAMES ssleay32MDd ssl ssleay32
-     PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/VC"
-     )
-   FIND_LIBRARY(SSL_EAY_RELEASE NAMES ssleay32MD ssl ssleay32
-     PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/VC"
-     )
+IF(WIN32 AND NOT CYGWIN)
+  # MINGW should go here too
+  IF(MSVC)
+    # /MD and /MDd are the standard values - if someone wants to use
+    # others, the libnames have to change here too
+    # use also ssl and ssleay32 in debug as fallback for openssl < 0.9.8b
+    # TODO: handle /MT and static lib
+    # In Visual C++ naming convention each of these four kinds of Windows libraries has it's standard suffix:
+    #   * MD for dynamic-release
+    #   * MDd for dynamic-debug
+    #   * MT for static-release
+    #   * MTd for static-debug
 
-   IF(MSVC_IDE)
-      IF(SSL_EAY_DEBUG AND SSL_EAY_RELEASE)
-         SET(OPENSSL_LIBRARIES optimized ${SSL_EAY_RELEASE} ${LIB_EAY_RELEASE} debug ${SSL_EAY_DEBUG} ${LIB_EAY_DEBUG})
-      ELSE(SSL_EAY_DEBUG AND SSL_EAY_RELEASE)
-         SET(OPENSSL_LIBRARIES NOTFOUND)
-         MESSAGE(STATUS "Could not find the debug and release version of openssl")
-      ENDIF(SSL_EAY_DEBUG AND SSL_EAY_RELEASE)
-   ELSE(MSVC_IDE)
-      STRING(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_TOLOWER)
-      IF(CMAKE_BUILD_TYPE_TOLOWER MATCHES debug)
-         SET(OPENSSL_LIBRARIES ${SSL_EAY_DEBUG} ${LIB_EAY_DEBUG})
-      ELSE(CMAKE_BUILD_TYPE_TOLOWER MATCHES debug)
-         SET(OPENSSL_LIBRARIES ${SSL_EAY_RELEASE} ${LIB_EAY_RELEASE})
-      ENDIF(CMAKE_BUILD_TYPE_TOLOWER MATCHES debug)
-   ENDIF(MSVC_IDE)
-   MARK_AS_ADVANCED(SSL_EAY_DEBUG SSL_EAY_RELEASE)
-   MARK_AS_ADVANCED(LIB_EAY_DEBUG LIB_EAY_RELEASE)
-ELSE(WIN32 AND MSVC)
+    # Implementation details:
+    # We are using the libraries located in the VC subdir instead of the parent directory eventhough :
+    # libeay32MD.lib is identical to ../libeay32.lib, and
+    # ssleay32MD.lib is identical to ../ssleay32.lib
+    FIND_LIBRARY(LIB_EAY_DEBUG NAMES libeay32MDd libeay32
+      PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/VC"
+      )
+    FIND_LIBRARY(LIB_EAY_RELEASE NAMES libeay32MD libeay32
+      PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/VC"
+      )
+    FIND_LIBRARY(SSL_EAY_DEBUG NAMES ssleay32MDd ssleay32 ssl
+      PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/VC"
+      )
+    FIND_LIBRARY(SSL_EAY_RELEASE NAMES ssleay32MD ssleay32 ssl
+      PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/VC"
+      )
+    if( CMAKE_CONFIGURATION_TYPES OR CMAKE_BUILD_TYPE )
+      set( OPENSSL_LIBRARIES
+        optimized ${SSL_EAY_RELEASE} ${LIB_EAY_RELEASE}
+        debug ${SSL_EAY_DEBUG} ${LIB_EAY_DEBUG}
+        )
+    else()
+      set( OPENSSL_LIBRARIES ${SSL_EAY_RELEASE} ${LIB_EAY_RELEASE} )
+    endif()
+    MARK_AS_ADVANCED(SSL_EAY_DEBUG SSL_EAY_RELEASE)
+    MARK_AS_ADVANCED(LIB_EAY_DEBUG LIB_EAY_RELEASE)
+  ELSEIF(MINGW)
+    # same player, for MingW
+    FIND_LIBRARY(LIB_EAY NAMES libeay32
+      PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/MinGW"
+      )
+    FIND_LIBRARY(SSL_EAY NAMES ssleay32
+      PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib/MinGW"
+      )
+    MARK_AS_ADVANCED(SSL_EAY LIB_EAY)
+    set( OPENSSL_LIBRARIES ${SSL_EAY} ${LIB_EAY} )
+  ELSE(MSVC)
+    # Not sure what to pick for -say- intel, let's use the toplevel ones and hope someone report issues:
+    FIND_LIBRARY(LIB_EAY NAMES libeay32
+      PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib"
+      )
+    FIND_LIBRARY(SSL_EAY NAMES ssleay32
+      PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\OpenSSL (32-bit)_is1;Inno Setup: App Path]/lib"
+      )
+    MARK_AS_ADVANCED(SSL_EAY LIB_EAY)
+    set( OPENSSL_LIBRARIES ${SSL_EAY} ${LIB_EAY} )
+  ENDIF(MSVC)
+ELSE(WIN32 AND NOT CYGWIN)
 
-   FIND_LIBRARY(OPENSSL_SSL_LIBRARIES NAMES ssl ssleay32 ssleay32MD)
-   FIND_LIBRARY(OPENSSL_CRYPTO_LIBRARIES NAMES crypto)
-   MARK_AS_ADVANCED(OPENSSL_CRYPTO_LIBRARIES OPENSSL_SSL_LIBRARIES)
+  FIND_LIBRARY(OPENSSL_SSL_LIBRARIES NAMES ssl ssleay32 ssleay32MD)
+  FIND_LIBRARY(OPENSSL_CRYPTO_LIBRARIES NAMES crypto)
+  MARK_AS_ADVANCED(OPENSSL_CRYPTO_LIBRARIES OPENSSL_SSL_LIBRARIES)
 
-   SET(OPENSSL_LIBRARIES ${OPENSSL_SSL_LIBRARIES} ${OPENSSL_CRYPTO_LIBRARIES})
+  SET(OPENSSL_LIBRARIES ${OPENSSL_SSL_LIBRARIES} ${OPENSSL_CRYPTO_LIBRARIES})
 
-ENDIF(WIN32 AND MSVC)
+ENDIF(WIN32 AND NOT CYGWIN)
 
-IF(OPENSSL_INCLUDE_DIR AND OPENSSL_LIBRARIES)
-   SET(OPENSSL_FOUND TRUE)
-ELSE(OPENSSL_INCLUDE_DIR AND OPENSSL_LIBRARIES)
-   SET(OPENSSL_FOUND FALSE)
-ENDIF (OPENSSL_INCLUDE_DIR AND OPENSSL_LIBRARIES)
-
-IF (OPENSSL_FOUND)
-   IF (NOT OpenSSL_FIND_QUIETLY)
-      MESSAGE(STATUS "Found OpenSSL: ${OPENSSL_LIBRARIES}")
-   ENDIF (NOT OpenSSL_FIND_QUIETLY)
-ELSE (OPENSSL_FOUND)
-   IF (OpenSSL_FIND_REQUIRED)
-      MESSAGE(FATAL_ERROR "Could NOT find OpenSSL")
-   ENDIF (OpenSSL_FIND_REQUIRED)
-ENDIF (OPENSSL_FOUND)
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(OpenSSL DEFAULT_MSG
+  OPENSSL_LIBRARIES 
+  OPENSSL_INCLUDE_DIR
+)
 
 MARK_AS_ADVANCED(OPENSSL_INCLUDE_DIR OPENSSL_LIBRARIES)