Add Linux variable and set -Werror for Linux builds.

CMakeLists.txt

@@ -8,8 +8,12 @@ include(cmake/Deb.cmake)
 include(cmake/Rpm.cmake)
 include(cmake/SipBindings.cmake)
 
+if (UNIX AND NOT APPLE)
+  set(LINUX 1)
+endif (UNIX AND NOT APPLE)
+
 find_package(Qt4 4.5.0 REQUIRED QtCore QtGui QtOpenGL QtSql QtNetwork QtXml)
-if(UNIX AND NOT APPLE)
+if (LINUX)
   option(ENABLE_DBUS "Enable D-Bus, MPRIS and native notifications. Required for DeviceKit and Wii remote support" ON)
   if(ENABLE_DBUS)
     find_package(Qt4 REQUIRED QtDbus)
@@ -22,7 +26,7 @@ if(UNIX AND NOT APPLE)
 
     option(ENABLE_WIIMOTEDEV "Enable Wii remote support in Clementine" ON)
   endif(ENABLE_DBUS)
-endif(UNIX AND NOT APPLE)
+endif (LINUX)
 
 if(NOT APPLE)
   find_package(Qt4 COMPONENTS QtWebKit)

src/CMakeLists.txt

@@ -2,6 +2,10 @@
 set(CMAKE_C_FLAGS "-Wall ${CMAKE_C_FLAGS}")
 set(CMAKE_CXX_FLAGS "-Woverloaded-virtual -Wall -Wno-sign-compare ${CMAKE_CXX_FLAGS}")
 
+if (LINUX)
+  set(CMAKE_CXX_FLAGS "-Werror ${CMAKE_CXX_FLAGS}")
+endif (LINUX)
+
 include_directories(${CMAKE_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
 include_directories(../3rdparty/gmock/gtest/include)
 if(WIN32)
@@ -997,14 +1001,14 @@ if (WIN32)
   )
 endif (WIN32)
 
-if (UNIX AND NOT APPLE)
+if (LINUX)
   # Hack: the Gold linker pays attention to the order that libraries are
   # specified on the link line.  -lX11 and -ldl are provided earlier in the link
   # command but they're actually used by libraries that appear after them, so
   # they end up getting ignored.  This appends them to the very end of the link
   # line, ensuring they're always used.
   target_link_libraries(clementine_lib -lX11 -ldl)
-endif (UNIX AND NOT APPLE)
+endif (LINUX)
 
 add_dependencies(clementine_lib qtsingleapplication)