Merge pull request #172 from ayyaruq/fix/mysql-includes

Fix CMake MySQL module to be more nix-friendly

cmake/mysql.cmake

@@ -1,6 +1,29 @@
 
 if(UNIX)
-    include_directories("/usr/include/mysql/")
+    find_path(MYSQL_INCLUDE_DIR mysql.h
+        /usr/include/mysql
+        /usr/local/include/mysql
+        /opt/mysql/mysql/include
+        /opt/mysql/mysql/include/mysql
+        /opt/mysql/include
+        /opt/local/include/mysql5
+        /usr/local/mysql/include
+        /usr/local/mysql/include/mysql
+        $ENV{ProgramFiles}/MySQL/*/include
+        $ENV{SystemDrive}/MySQL/*/include
+    )
+
+    if(MYSQL_INCLUDE_DIR)
+        set(MYSQL_FOUND TRUE)
+
+        include_directories(${MYSQL_INCLUDE_DIR})
+    endif(MYSQL_INCLUDE_DIR)
+
+    if(MYSQL_FOUND)
+        message(STATUS "MySQL include dir: ${MYSQL_INCLUDE_DIR}")
+    else(MYSQL_FOUND)
+        message(FATAL_ERROR "Could not find MySQL headers.")
+    endif(MYSQL_FOUND)
 else()
     include_directories("${LIBRARY_DIR}/external/MySQL/")
     if(CMAKE_SIZEOF_VOID_P EQUAL 4)
@@ -13,5 +36,3 @@ else()
         link_directories(${LIBRARY_DIR}/external/zlib/x64)
     endif()
 endif()
-
-