few improvements for UNIX build

CMakeLists.txt

@@ -7,6 +7,7 @@
 # global options:
 #   BRANDING        branding_default    The branding to use for Desurium.
 #                                       possible values: branding_default, branding_desura
+#   DEBUG           OFF                 will add debug symbols and other debugging stuff
 #
 # unix-only options:
 #   WITH_ARES       ON                  build CURL with ares support (c-ares REQUIRED)
@@ -21,8 +22,10 @@ set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules")
 set(CMAKE_PLATFORM_PATH "${CMAKE_SOURCE_DIR}/cmake/platform")
 set(CMAKE_EXTERNAL_BINARY_DIR "${CMAKE_BINARY_DIR}/external")
 
-if(NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_BUILD_TYPE)
-   set(CMAKE_BUILD_TYPE Debug)
+if(DEBUG)
+  set(CMAKE_BUILD_TYPE Debug)
+else()
+  set(CMAKE_BUILD_TYPE Release)
 endif()
 
 include(CheckOptions)

cmake/modules/CheckOptions.cmake

@@ -4,6 +4,7 @@
 
 set(BRANDING "branding_default"
     CACHE STRING "The branding to use for Desurium.")
+option(DEBUG "enable debug build" OFF)
 
 ###############################################################################
 # unix-only options

cmake/platform/unix/platform.cmake

@@ -9,14 +9,15 @@ add_definitions(-DBOOST_FILESYSTEM_VERSION=2 -D_LARGE_FILES
 # some compiler flags
 ###############################################################################
 
-if(CMAKE_BUILD_TYPE MATCHES "Debug")
+# TODO: if DEBUG is not defined, the binary will be copied
+#if(DEBUG)
     add_definitions(-DDEBUG)
-else()
-    add_definitions(-DNDEBUG)
-endif()
+#else()
+#    add_definitions(-DNDEBUG)
+#endif()
 
-add_compiler_flags(-fPIC -pipe -fvisibility=hidden -Wl,-Bsymbolic-functions -lpthread -g3)
-add_compiler_flags(DEBUG -rdynamic -fno-omit-frame-pointer)
+add_compiler_flags(-fPIC -pipe -fvisibility=hidden -Wl,-Bsymbolic-functions -lpthread -finline-functions)
+add_compiler_flags(DEBUG -rdynamic -fno-omit-frame-pointer -g3)
 add_compiler_flags(RELEASE -O2)
 
 add_compiler_flags(CXX -fpermissive)