Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -191,11 +191,7 @@ if(UNIX
             -pedantic
             -Wstrict-prototypes
             -Wmissing-prototypes
-            -Werror-implicit-function-declaration
-            $<$<CONFIG:Release>:-fomit-frame-pointer>
-            $<$<C_COMPILER_ID:Clang,AppleClang>:
-            -Wno-missing-field-initializers>
-            -flto)
+            -Werror-implicit-function-declaration)
   if(BUILD_FUZZER)
     target_compile_options(unarr PUBLIC "${sanitize_opts}")
     target_compile_definitions(
@@ -208,17 +204,6 @@ if(UNIX
 
   if(BUILD_FUZZER)
     set(linker_opts "${sanitize_opts}")
-  else()
-    if("${CMAKE_C_COMPILER_ID}" STREQUAL "AppleClang")
-      set(linker_opts "-Wl,-undefined,error")
-    else()
-      set(linker_opts "-Wl,--as-needed -Wl,--no-undefined")
-    endif()
-  endif()
-
-  # Clang linker needs -flto too when doing lto
-  if("${CMAKE_C_COMPILER_ID}" MATCHES "Clang")
-    set(linker_opts "${linker_opts} -flto")
   endif()
 
   set_target_properties(unarr PROPERTIES LINK_FLAGS "${linker_opts}")