* elfread.c (elf_symfile_read): Don't call

dwarf2_build_frame_info.
	* dwarf2read.c (struct dwarf2_section_info) <readin>: New field.
	(struct dwarf2_per_objfile) <objfile>: New field.
	(dwarf2_has_info): Now idempotent.  Set objfile field.
	(dwarf2_read_section): Check and set readin field.  Call
	posix_madvise.
	(dwarf2_build_psymtabs): Don't read all sections.
	(read_type_comp_unit_head): Read types section.
	(create_debug_types_hash_table): Likewise.
	(init_cu_die_reader): Add asserts.
	(process_type_comp_unit): Add assert.
	(dwarf2_build_psymtabs_hard): Read info section.
	(load_partial_comp_unit): Add assert.
	(create_all_comp_units): Read info section.
	(load_full_comp_unit): Likewise.
	(dwarf2_ranges_read): Read ranges section.
	(dwarf2_record_block_ranges): Add assert.
	(dwarf2_read_abbrevs): Read abbrev section.
	(read_indirect_string): Read str section.
	(dwarf_decode_line_header): Read line section.
	(read_signatured_type_at_offset): Read types section.
	(dwarf_decode_macros): Read macinfo section.
	(dwarf2_symbol_mark_computed): Read loc section.
	* dwarf2-frame.c (dwarf2_frame_find_fde): Call
	dwarf2_build_frame_info.
	(dwarf2_build_frame_info): Unconditionally set
	dwarf2_frame_objfile_data on the objfile.
	* configure.ac: Check for posix_madvise.
	* config.in, configure: Rebuild.

gdb/configure

@@ -11234,7 +11234,7 @@ for ac_func in canonicalize_file_name realpath getrusage getuid \
 		getgid pipe poll pread64 sbrk setpgid setpgrp setsid \
 		sigaction sigprocmask sigsetmask socketpair syscall \
 		ttrace wborder setlocale iconvlist libiconvlist btowc \
-		setrlimit getrlimit
+		setrlimit getrlimit posix_madvise
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"