Revert "[builtins] Disable COMPILER_RT_CRT_USE_EH_FRAME_REGISTRY by d… (#84580)

…efault (#83201)"

This reverts commit 062cfad. See issue
#84574.

Author: mysterymath

compiler-rt/lib/builtins/CMakeLists.txt

@@ -917,7 +917,7 @@ cmake_dependent_option(COMPILER_RT_BUILD_CRT "Build crtbegin.o/crtend.o" ON "COM
 if (COMPILER_RT_BUILD_CRT)
   add_compiler_rt_component(crt)
 
-  option(COMPILER_RT_CRT_USE_EH_FRAME_REGISTRY "Use eh_frame in crtbegin.o/crtend.o" OFF)
+  option(COMPILER_RT_CRT_USE_EH_FRAME_REGISTRY "Use eh_frame in crtbegin.o/crtend.o" ON)
 
   include(CheckSectionExists)
   check_section_exists(".init_array" COMPILER_RT_HAS_INITFINI_ARRAY

compiler-rt/test/builtins/Unit/ctor_dtor.c

@@ -9,13 +9,23 @@
 
 // Ensure the various startup functions are called in the proper order.
 
+// CHECK: __register_frame_info()
 /// ctor() is here if ld.so/libc supports DT_INIT/DT_FINI
 // CHECK:      main()
 /// dtor() is here if ld.so/libc supports DT_INIT/DT_FINI
+// CHECK:      __deregister_frame_info()
 
 struct object;
 static int counter;
 
+void __register_frame_info(const void *fi, struct object *obj) {
+  printf("__register_frame_info()\n");
+}
+
+void __deregister_frame_info(const void *fi) {
+  printf("__deregister_frame_info()\n");
+}
+
 void __attribute__((constructor)) ctor() {
   printf("ctor()\n");
   ++counter;