This breaks constructors on pretty much every elf+newlib target, because newlib and gcc both use HAVE_INITFINI_ARRAY (and have for many years) but the tests don't match. GCC puts ctors in .ctors but libgcc is built without support for them (newlib's generated config headers define HAVE_INITFINI_ARRAY, which causes gcc's initini-array.h to set USE_INITFINI_ARRAY, which shuts off libgcc's ctor/dtor support), so they don't run.
> 2011-08-20 H.J. Lu <hongjiu...@intel.com> > > PR target/46770 > * config.gcc (tm_file): Add initfini-array.h if > .init_arrary/.fini_array are supported. > > * crtstuff.c: Don't generate .ctors nor .dtors sections if > USE_INITFINI_ARRAY is defined. > > * output.h (default_elf_init_array_asm_out_constructor): New. > (default_elf_fini_array_asm_out_destructor): Likewise. > * varasm.c (elf_init_array_section): Likewise. > (elf_fini_array_section): Likewise. > (get_elf_initfini_array_priority_section): Likewise. > (default_elf_init_array_asm_out_constructor): Likewise. > (default_elf_fini_array_asm_out_destructor): Likewise. > > * config/initfini-array.h: New.
