Fixes GCC build

CMakeLists.txt

@@ -32,9 +32,12 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
 endif ()
 
 if (CMAKE_BUILD_TYPE MATCHES Release)
-    # Include debug symbols in all linux builds
-    message("Including debug symbols")
-    add_compile_options(-g -gline-tables-only)
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+        # Include debug symbols in all linux builds
+        message("Including debug symbols")
+        add_compile_options(-g -gline-tables-only)
+    endif ()
+    # FIXME: Add debug symbols for GCC
 endif ()
 
 # Grab all cpp and hpp files in our source directories.