Builder|CMake: Added root CMakeLists; tweaks for Unix config

There is now a root-level CMakeLists.txt for easier automation.

The Unix build configuration was made more robust by reducing use of
global add_definitions().

CMakeLists.txt

@@ -0,0 +1,5 @@
+# Doomsday Engine
+# Top-level CMakeLists
+
+cmake_minimum_required (VERSION 3.1)
+add_subdirectory (doomsday)

doomsday/cmake/PlatformUnix.cmake

@@ -21,16 +21,6 @@ add_definitions (
     -D__USE_BSD
     -D_GNU_SOURCE=1
 )
-if (DENG_BASE_DIR)
-    add_definitions (-DDENG_BASE_DIR="${DENG_BASE_DIR}")
-else ()
-    add_definitions (-DDENG_BASE_DIR="${CMAKE_INSTALL_PREFIX}/${DENG_INSTALL_DATA_DIR}")
-endif ()
-if (NOT DENG_LIBRARY_DIR STREQUAL "")
-    add_definitions (-DDENG_LIBRARY_DIR="${DENG_LIBRARY_DIR}")
-else ()
-    add_definitions (-DDENG_LIBRARY_DIR="${CMAKE_INSTALL_PREFIX}/${DENG_INSTALL_PLUGIN_DIR}")
-endif ()
 
 if (DENG_UPDATER_PLATFORM)
     add_definitions (-DDENG_PLATFORM_ID="${DENG_UPDATER_PLATFORM}-${DENG_ARCH}")
@@ -39,6 +29,10 @@ else ()
 endif ()
 
 if (CMAKE_COMPILER_IS_GNUCXX)
+    foreach (cxxOpt -Wno-deprecated-copy;-Wno-class-memaccess;-Wno-address-of-packed-member)
+        append_unique (CMAKE_CXX_FLAGS ${cxxOpt})
+    endforeach (cxxOpt)
+
     # The tree FRE optimization causes crashes with GCC 6 (Yakkety).
     append_unique (CMAKE_CXX_FLAGS_RELEASE        -fno-tree-fre)
     append_unique (CMAKE_CXX_FLAGS_RELWITHDEBINFO -fno-tree-fre)

doomsday/sdk/libcore/CMakeLists.txt

@@ -60,6 +60,23 @@ deng_add_library (libcore ${SOURCES} ${HEADERS})
 target_include_directories (libcore PRIVATE ${ZLIB_INCLUDE_DIR})
 deng_target_link_qt (libcore PUBLIC Core Network)
 target_link_libraries (libcore PUBLIC ${ZLIB_LIBRARIES})
+if (UNIX AND NOT APPLE)
+    if (DENG_BASE_DIR)
+        set (baseDir "${DENG_BASE_DIR}")
+    else ()
+        set (baseDir "${CMAKE_INSTALL_PREFIX}/${DENG_INSTALL_DATA_DIR}")
+    endif ()
+    if (DENG_LIBRARY_DIR)
+        set (libDir "${DENG_LIBRARY_DIR}")
+    else ()
+        set (libDir "${CMAKE_INSTALL_PREFIX}/${DENG_INSTALL_PLUGIN_DIR}")
+    endif ()
+    target_compile_definitions (libcore PUBLIC
+        -DDENG_BASE_DIR="${baseDir}"
+        -DDENG_LIBRARY_DIR="${libDir}"
+    )
+endif ()
+
 deng_deploy_library (libcore DengCore)
 
 deng_cotire (libcore src/precompiled.h)