Linux fix

Author: timothyschoen

CMakeLists.txt

@@ -101,9 +101,12 @@ if (CMAKE_C_COMPILER_ID MATCHES "Clang")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror=return-type")
 endif()
 
-if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     add_compile_options(-ffunction-sections -fdata-sections)
-    add_link_options(-Wl,--dead_strip)
+    add_link_options(-Wl,-dead_strip)
+elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    add_compile_options(-ffunction-sections -fdata-sections)
+    add_link_options(-Wl,--gc-sections)
 elseif (MSVC)
     # MSVC equivalent for dead code stripping
     add_link_options(/OPT:REF /OPT:ICF)