Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -105,27 +105,12 @@ endif()
 if(UNIX OR MINGW OR MSYS)
   target_compile_options(unarr PRIVATE -Wall -Wextra -pedantic
                     -Wstrict-prototypes -Wmissing-prototypes
-                    -Werror-implicit-function-declaration
-                    $<$<CONFIG:Release>:-fomit-frame-pointer>
-                    $<$<OR:$<C_COMPILER_ID:Clang>,$<C_COMPILER_ID:AppleClang>>:
-                    -Wno-missing-field-initializers>
-                    -flto)
+                    -Werror-implicit-function-declaration)
   target_compile_definitions(unarr PRIVATE -D_FILE_OFFSET_BITS=64)
 
   # Linker flags
 
-  # Clang linker needs -flto too when doing lto
-  if("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
-    set_target_properties(unarr PROPERTIES LINK_FLAGS
-                          "-Wl,--no-undefined -Wl,--as-needed -flto")
-  # Apple ld uses different syntax for undefined symbol check
-  elseif("${CMAKE_C_COMPILER_ID}" STREQUAL "AppleClang")
-    set_target_properties(unarr PROPERTIES LINK_FLAGS
-                          "-Wl,-undefined,error -flto")
-  else()
-    set_target_properties(unarr PROPERTIES LINK_FLAGS
-                          "-Wl,--no-undefined -Wl,--as-needed")
-  endif()
+
 endif()
 
 if(MSVC)